{"title":"Direct visualization and mechanistic insights into initial lithium plating in anode-free lithium metal batteries","authors":"Jin Su and Chun Huang","doi":"10.1039/D5EE01956G","DOIUrl":"10.1039/D5EE01956G","url":null,"abstract":"<p >Anode-free lithium metal batteries (AFBs), which use bare Cu current collectors, represent a promising energy storage technology that offers higher energy density than conventional lithium-ion batteries. Without a lithium metal anode, AFBs are easier to assemble and more cost-effective. However, they suffer from rapid capacity loss and short cycle life limiting their practical applications. A major challenge in their development lies in achieving an understanding of the cycling protocols and mechanisms needed to control the morphology and microstructure of the initial lithium anode growth on the Cu current collector (Cu-CC). In this study, we observed a significant pressure difference between the annular edge and center regions of the Cu-CC in coin cell type AFBs, which dramatically influenced the microstructural morphology of the initial lithium metal growth process. We demonstrated that lithium metal plated in the high-pressure annular edge region forms large, dense grains with a void-free internal structure and a smooth, flat surface, whereas in the low-pressure center region, lithium metal plating consists of small, loose, and tortuous grains with abundant voids and a rough surface. The pressure difference does not affect the solid electrolyte interphase (SEI) composition in these regions. This study provides a unified view on initial lithium metal plating on the bare Cu current collector in AFBs for achieving a uniform and dense lithium metal microstructure.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 19","pages":" 8815-8826"},"PeriodicalIF":30.8,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ee/d5ee01956g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144802761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Junyi Dai, Jiahao Li, Fangxin Ling, Yu Yao, Yanru Wang, Mingze Ma, Jian Feng, Jun Xia, Yinbo Zhu, Hai Yang, Xianhong Rui, Hengan Wu and Yan Yu
{"title":"Unraveling the degradation mechanism of sodium iron hexacyanoferrate cathodes in sodium ion batteries","authors":"Junyi Dai, Jiahao Li, Fangxin Ling, Yu Yao, Yanru Wang, Mingze Ma, Jian Feng, Jun Xia, Yinbo Zhu, Hai Yang, Xianhong Rui, Hengan Wu and Yan Yu","doi":"10.1039/D5EE02117K","DOIUrl":"10.1039/D5EE02117K","url":null,"abstract":"<p >Sodium iron hexacyanoferrates (Na<small><sub>2</sub></small>FeFe(CN)<small><sub>6</sub></small>) are considered among the most promising cathode materials for sodium ion batteries due to their high theoretical energy density and low cost. However, structural Fe(CN)<small><sub>6</sub></small><small><sup>4−</sup></small> vacancies seriously impair structure stability and deteriorate electrochemical performance. So far, the mechanisms by which Fe(CN)<small><sub>6</sub></small><small><sup>4−</sup></small> vacancies cause performance degradation and ultimately result in material failure have remained unclear, leading to persistent controversies in this field. Herein, we systematically investigate the degradation mechanisms induced by Fe(CN)<small><sub>6</sub></small><small><sup>4−</sup></small> vacancies from experimental and theoretical perspectives. A defective Na<small><sub>2</sub></small>FeFe(CN)<small><sub>6</sub></small> cathode exhibits more hysteretic low-spin iron reaction kinetics, especially during charge transfer and ion diffusion. Cryo-electron microscopy reveals that interfacial side reactions triggered by Fe(CN)<small><sub>6</sub></small><small><sup>4−</sup></small> vacancies during electrochemical cycling produce excessive Na<small><sub>2</sub></small>CO<small><sub>3</sub></small> and NaF byproducts, which deplete electrochemically active Na<small><sup>+</sup></small> within defective structures, causing electrochemical failure of high-spin Fe–N interactions and ultimately leading to poor structural stability. Importantly, pouch full cells (71% retention after 650 cycles) and all-solid-state batteries (82% retention after 500 cycles) fabricated from industrial-scale low-defect Na<small><sub>2</sub></small>FeFe(CN)<small><sub>6</sub></small> cathodes exhibit excellent cycling stability. This work offers valuable mechanistic insights into vacancy-induced degradation of Na<small><sub>2</sub></small>FeFe(CN)<small><sub>6</sub></small> cathodes and contributes to the advancement of practical sodium storage cathode materials.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 19","pages":" 8791-8802"},"PeriodicalIF":30.8,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144792512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hongjun Chen, Heejong Shin, Jianan Erick Huang, Hengzhou Liu, Rui Kai Miao, Rong Xia, Weiyan Ni, Jiaqi Yu, Yongxiang Liang, Bosi Peng, Yuanjun Chen, Guangcan Su, Ke Xie, Anita Ho-Baillie and Edward H. Sargent
{"title":"Electrolysis of ethylene to ethylene glycol paired with acidic CO2-to-CO conversion","authors":"Hongjun Chen, Heejong Shin, Jianan Erick Huang, Hengzhou Liu, Rui Kai Miao, Rong Xia, Weiyan Ni, Jiaqi Yu, Yongxiang Liang, Bosi Peng, Yuanjun Chen, Guangcan Su, Ke Xie, Anita Ho-Baillie and Edward H. Sargent","doi":"10.1039/D5EE02847G","DOIUrl":"10.1039/D5EE02847G","url":null,"abstract":"<p >Electrochemical conversion of CO<small><sub>2</sub></small> into CO, ethylene, and other valuable chemicals is a promising method for carbon capture and utilisation. However, when carried out in an alkaline or neutral media, (bi)carbonate formation leads to low atom efficiency in the electrocatalytic process. In contrast, acidic conditions enable >80% CO<small><sub>2</sub></small> utilization, but there is a need to lower full-cell voltage. In this work, we paired the acidic cathodic CO<small><sub>2</sub></small>-to-CO reaction with acidic anodic ethylene-to-ethylene glycol (C<small><sub>2</sub></small>H<small><sub>4</sub></small>-to-EG) conversion for the first time. For the selective oxidation of ethylene to EG, we employed a homogeneous redox mediator ruthenium–polyoxometalate (Ru–POM) with gold-modified electrodes for the first time to facilitate the redox cycle. This resulted in enhanced selectivity and stability, achieving a faradaic efficiency (FE) of 83% for EG. At the cathode, a porous nickel single-atom catalyst drives the conversion of CO<small><sub>2</sub></small> into CO in an acidic electrolyte with an FE of 97%. The paired system operates at a full-cell voltage of 3.1 V, compared to 3.3 V for a reference system using the oxygen evolution reaction. The demonstrated system offers a promising route for reducing carbon emissions with high atom efficiency.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 18","pages":" 8600-8607"},"PeriodicalIF":30.8,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ee/d5ee02847g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144787203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yiwei Xu, Xin He, Xianfeng Liang, Heng Huang, Jingen Wu, Dengfeng Ju, Jinghong Guo, Shuxiang Dong, Zhongqiang Hu and Ming Liu
{"title":"Multiple-coupling optimization strategy for significantly enhancing the output power density of a compact magneto-mechano-electric energy harvester","authors":"Yiwei Xu, Xin He, Xianfeng Liang, Heng Huang, Jingen Wu, Dengfeng Ju, Jinghong Guo, Shuxiang Dong, Zhongqiang Hu and Ming Liu","doi":"10.1039/D5EE01346A","DOIUrl":"10.1039/D5EE01346A","url":null,"abstract":"<p >A magneto-mechano-electric-energy harvester (MME-EH) is considered a promising candidate for powering the “Internet of Things” (IoT) devices by capturing power-frequency magnetic fields, which are ubiquitous in modern infrastructure. However, further reduction in size of conventional MME-EHs has encountered considerable challenges due to the insufficient MME coupling efficiency of cantilever structures with limited space. We report an optimization strategy for significantly enhancing the output power density of MME-EHs, realized by strengthening magneto-mechanical, mechanical, and electromechanical couplings by adjusting the relative position of the neutral axis and flexural rigidity of piezoelectric/elastic phases. Experimentally, the optimized MME-EH with a compact volume of 0.97 cm<small><sup>3</sup></small> achieved a record-high output power density of 0.73 mW cm<small><sup>−3</sup></small> Oe<small><sup>−2</sup></small> under a weak magnetic field of 1 Oe at 50 Hz, representing a 124% enhancement compared with that of previously reported MME-EHs. The underlying mechanisms were revealed theoretically by multi-field coupled behavior analysis based on a finite element analysis model and a two-degree-of-freedom equivalent spring-mass model. The power supply capability of the proposed MME-EH was demonstrated in a wireless sensor network (WSN) for smart grids, which paves the way for potential applications in self-powered large-scale WSNs.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 17","pages":" 8339-8351"},"PeriodicalIF":30.8,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144787198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A dual-site additive mediated crystallization strategy for homogenized FA–Cs based perovskite solar cells","authors":"Qihang Sun, Tianyin Miao, Chenyue Wang, Yu Tian, Yusong Ding, Zhenhuang Su, Bingchen He, Meirong Fu, Ziheng Zhang, Liujiang Zhang, Qingli Cao, Zonghao Liu, Ziqiu Ren, Wei Chen, Xingyu Gao and Jianhua He","doi":"10.1039/D5EE02577J","DOIUrl":"10.1039/D5EE02577J","url":null,"abstract":"<p >Although the coordinatively stabilized lattice and the ease of solution processability render mixed A-site perovskites an ideal material for high-efficiency and stable perovskite photovoltaics, the spontaneous cation segregation between formamidinium (FA) and cesium (Cs) poses a critical threat to device performance. This study demonstrates that the divergent coordination capabilities among components, in conjunction with non-equilibrium crystallization kinetics, are the underlying causes of interfacial phase separation. Such a phenomenon leads to lattice mismatch and non-radiative recombination, which severely compromise the performance and operational stability of devices. To address this challenge, we developed a dual-site additive mediated crystallization strategy employing bifunctional molecular design, which enables film homogenization and minimizes interfacial loss. The resulting inverted devices demonstrate impressive efficiencies of 26.68% (0.057 cm<small><sup>2</sup></small> aperture area, certified: 26.51%) and 25.14% (1 cm<small><sup>2</sup></small> aperture area), highlighting exceptional scalability. Crucially, the dual-site cooperative modulation mechanism suppresses degradation pathways, allowing devices to retain >94% initial efficiency after operating for over 1100 hours at the maximum power point under 1 sun. Our findings provide transformative insights into solution chemistry design, crystallization control, and manufacturing scalability, establishing a robust and comprehensive framework for the commercialization of perovskite photovoltaics.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 18","pages":" 8645-8657"},"PeriodicalIF":30.8,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144787199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A hybrid plasma-electro-membrane triple intensified system over PdNPs/Fe–N–C for ammonium fertilizer synthesis","authors":"Cheng Wang, Chang Yu, Bingzhi Qian, Yongwen Ren, Rulong Ma, Yue Chu and Jieshan Qiu","doi":"10.1039/D5EE01513H","DOIUrl":"10.1039/D5EE01513H","url":null,"abstract":"<p >Upgrading nitrogen into ammonium fertilizer under environmental conditions presents a promising prospect for the application of distributed renewable energy. Herein, a hybrid plasma-electro-membrane triple intensified system is developed for the synthesis of ammonium fertilizers. Initially, the air undergoes transformation into NO<small><sub>2</sub></small><small><sup>−</sup></small> through the use of plasma. Then, Pd<small><sub>NPs</sub></small>/Fe–N–C, which is composed of palladium nanoparticles (Pd<small><sub>NPs</sub></small>) and iron single atoms (Fe–N–C), was employed as the catalyst for the NO<small><sub>2</sub></small><small><sup>−</sup></small> electroreduction reaction (NO<small><sub>2</sub></small><small><sup>−</sup></small>RR), exhibiting a remarkable NH<small><sub>3</sub></small> yield rate of 92.7 mg h<small><sup>−1</sup></small> mg<small><sub>cat</sub></small><small><sup>−1</sup></small>, corresponding to a faradaic efficiency (FE) of nearly 100%. Experimental and theoretical analyses showed that Fe–N–C is the active site for NO<small><sub>2</sub></small><small><sup>−</sup></small> reduction, and Pd<small><sub>NPs</sub></small> can dissociate water to produce adsorbed hydrogen for nitrogen intermediate reduction. The electron transfer between Pd<small><sub>NPs</sub></small> and the Fe–N–C makes the spin configuration of Fe change from a low to a medium spin state, thereby decreasing the energy barrier of the *NO hydrogenation process during the NO<small><sub>2</sub></small><small><sup>−</sup></small>RR. Finally, the NH<small><sub>3</sub></small>-containing electrolyte is passed through a membrane separation reactor optimized for mass transfer to achieve NH<small><sub>3</sub></small> recovery and ammonium fertilizer synthesis. The Pd<small><sub>NPs</sub></small>/Fe–N–C driven hybrid system achieves a high (NH<small><sub>4</sub></small>)<small><sub>2</sub></small>SO<small><sub>4</sub></small> yield of 685.8 mg h<small><sup>−1</sup></small>, which can also be applied to the synthesis of other ammonium fertilizers.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 19","pages":" 8849-8859"},"PeriodicalIF":30.8,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144787306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lin Zhang, Hongjing Shang, Hao Dong, Hongwei Gu and Fazhu Ding
{"title":"Ultra-high-performance Ag2Se-based flexible thermoelectric generator","authors":"Lin Zhang, Hongjing Shang, Hao Dong, Hongwei Gu and Fazhu Ding","doi":"10.1039/D5EE03009A","DOIUrl":"10.1039/D5EE03009A","url":null,"abstract":"<p >While flexible thermoelectric materials hold promise for wearable electronics, the low performance of films and the inefficiency of devices fundamentally restrict their practical applications. Herein, we have presented a microstructure engineering strategy to fabricate high-performance Ag<small><sub>2</sub></small>Se films. <em>Via</em> regulation of the grain-growth process, Ag<small><sub>2</sub></small>Se grains with large sizes are obtained, in which the carrier mobility is significantly enhanced to up to ∼1300 cm<small><sup>2</sup></small> V<small><sup>−1</sup></small> s<small><sup>−1</sup></small> at room temperature due to the reduced electron scattering, and low-angle grain boundaries are developed, with the room-temperature lattice thermal conductivity decreasing to 0.26 W m<small><sup>−1</sup></small> K<small><sup>−1</sup></small> because of the increased mid-frequency phonon scattering, thus partially decoupling the electrical and thermal properties. Benefiting from this, a high <em>ZT</em> of 1.15 is achieved at 300 K. Using these films, a flexible and wearable thermoelectric generator incorporating 100 pairs of thermoelectric legs was successfully developed. In the generator, a sputtering Ag buffer layer was introduced to reduce the contact resistance and interfacial reaction. As a result, this thermoelectric generator exhibits an ultra-high normalized power density of ∼9.09 μW m<small><sup>−1</sup></small> K<small><sup>−2</sup></small>, which is also the current record-breaking value among thermoelectric film devices. The superior performance allows the thermoelectric generator to power various portable electronics, including LED lights, wristwatches, and, particularly, smartphones. This work establishes a generalizable framework for developing high-performance and manufacturable thermoelectric materials and devices, narrowing the gap between laboratory breakthroughs and industrial adoption in wearable energy harvesting.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 17","pages":" 8292-8302"},"PeriodicalIF":30.8,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144778652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interfacial phase regulation of flexible single-ion conducting block copolymer electrolytes ensuring ultra-stable lithium metal batteries","authors":"Yating Yu, Sida Chen, Hai-Peng Liang, Ziqi Zhao, Guangze Chu, Ziting Zhi, Xian-Ao Li, Cheng Li, Ruixin Li, Xin Liu, Minghua Chen, Youzhi Xu, Stefano Passerini and Zhen Chen","doi":"10.1039/D5EE02503F","DOIUrl":"10.1039/D5EE02503F","url":null,"abstract":"<p >Single-ion conducting copolymer electrolytes (SIPEs) have significant potential for next-generation lithium metal batteries (LMBs). However, the unsatisfactory ionic conductivity, limited mechanical strength, and lack of insights into the lithium-ion transport mechanism hinder their wide applications in LMBs. In this regard, we develop a novel SIPE through tethering lithium 3-hydroxypropanesulfonyl-trifluoromethanesulfonylimide onto a poly(vinylidene fluoride-<em>co</em>-trifluorochloroethylene)-based copolymer (PCL-SIPE). Molecular dynamics simulations reveal a unique transport pathway where fluorine atoms in the copolymer backbone interact with lithium-ions, serving as staging points for ion transport between adjacent sidechains. Compared with dual-ion conducting counterparts, PCL-SIPE exhibits significantly higher Young's modulus (28 <em>vs.</em> 17 GPa), tensile strength (20.65 <em>vs.</em> 5.65 MPa), and <em>t</em><small><sub>Li<small><sup>+</sup></small></sub></small> (0.94 <em>vs.</em> 0.39), achieving substantially prolonged lithium stripping-plating lifetime, <em>ca.</em>, >3200 <em>vs.</em> 323 h. This is predominantly ascribed to the as-formed favorable solid electrolyte interphase with ideal constitutions—ultra-high LiF content in combination with Li<small><sub>2</sub></small>O, dynamically regulating uniform Li<small><sup>+</sup></small> flux and stabilizing the electrode|electrolyte interface. Thereby, PCL-SIPE demonstrates superior compatibility with both LiFePO<small><sub>4</sub></small> (LFP) and LiNi<small><sub>0.8</sub></small>Co<small><sub>0.1</sub></small>Mn<small><sub>0.1</sub></small>O<small><sub>2</sub></small> cathodes in full-cells, and achieves impressive performance even under high-loading conditions (15 mg cm<small><sup>−2</sup></small>), low-temperature (−30 °C), in trilayer bipolar stacking pouch full-cells, achieving an energy density of 245.88 Wh kg<small><sup>−1</sup></small>. These render PCL-SIPE a strong candidate for next-generation high-performance LMBs.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 18","pages":" 8575-8587"},"PeriodicalIF":30.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ee/d5ee02503f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seong Eun Yang, Jungsoo Lee, Haiyang Li, Byungki Ryu and Jae Sung Son
{"title":"Design principles for 3D thermoelectric materials in power generators","authors":"Seong Eun Yang, Jungsoo Lee, Haiyang Li, Byungki Ryu and Jae Sung Son","doi":"10.1039/D5EE03225C","DOIUrl":"10.1039/D5EE03225C","url":null,"abstract":"<p >Thermoelectric power generation, which converts waste heat into electricity, represents a promising approach toward sustainable energy harvesting. While geometric regulation of thermoelectric materials has shown significant potential for enhancing device performance, existing theoretical and computational approaches typically rely on simplified, case-specific designs under constrained conditions. This limitation primarily stems from theoretical challenges in comprehensively understanding thermoelectric transport in three-dimensional (3D) materials in varied thermal environments. Here, we develop an analytical theoretical framework to rigorously examines power generation in 3D thermoelectric materials across diverse thermal boundary conditions. Based on this framework, we propose a universal geometric design principle to optimize 3D materials for maximum power generation and introduce a universal figure of merit that comprehensively integrates material properties, geometry, and boundary conditions. Experimental validation using optimized 3D-printed (Bi,Sb)<small><sub>2</sub></small>Te<small><sub>3</sub></small> legs demonstrates significant enhancements in performance. This study establishes a robust theoretical foundation and practical design strategy, advancing thermoelectric energy harvesting beyond traditional material–property-based optimizations.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 18","pages":" 8537-8548"},"PeriodicalIF":30.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ee/d5ee03225c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kwon-Hyung Lee, Hyeongseok Shim, Sang Hyun Lee, Hyeong-Jong Kim, Chanhyun Park, Jingyu Choi, Seok-Ju Lee, Young-Kuk Hong, Jihong Lyu, Jin Chul Kim, Sijeong Park, Hyungyeon Cha, Wooyoung Jin, Jinsoo Kim, Sinho Choi, Sang-Young Lee, Sung-Kyun Jung, Michael De Volder, Tae-Hee Kim and Gyujin Song
{"title":"Dual-fibrous PTFE structure enabling uniform and thick dry electrodes for high-energy-density and long-lasting batteries","authors":"Kwon-Hyung Lee, Hyeongseok Shim, Sang Hyun Lee, Hyeong-Jong Kim, Chanhyun Park, Jingyu Choi, Seok-Ju Lee, Young-Kuk Hong, Jihong Lyu, Jin Chul Kim, Sijeong Park, Hyungyeon Cha, Wooyoung Jin, Jinsoo Kim, Sinho Choi, Sang-Young Lee, Sung-Kyun Jung, Michael De Volder, Tae-Hee Kim and Gyujin Song","doi":"10.1039/D5EE03240G","DOIUrl":"10.1039/D5EE03240G","url":null,"abstract":"<p >Dry-processed electrodes based on poly(tetrafluoroethylene) (PTFE) binder have emerged as a promising technology for sustainable, low-cost and high-areal-capacity electrode manufacturing. However, understanding its fibrillation behaviour becomes a key engineering factor to achieve mechanically robust electrodes with high electrochemical performance. Herein, we present a dual-fibrous dry electrode (DDE) fabricated <em>via</em> a multi-step grinding and kneading process. Compared to conventional single-type fibrous structures, the proposed DDE exhibits a more uniform material distribution, enabling better electronic conductivity and reaction homogeneity, which in turn results in better cycling stability. Additionally, the PTFE rope in the DDE demonstrates excellent mechanical integrity and edge uniformity—critical attributes for roll-to-roll manufacturing. Overall, our DDE achieves a high areal capacity of 10.1 mAh cm<small><sup>−2</sup></small> with stable cycle retention. Furthermore, a 1.2 Ah-class stacked pouch full cell incorporating the DDE delivers a high energy density of 349 Wh kg<small><sub>cell</sub></small><small><sup>−1</sup></small>/800 Wh L<small><sub>cell</sub></small><small><sup>−1</sup></small> when paired with a lithium metal anode, and exhibits 80.2% capacity retention after 600 cycles when paired with a graphite anode, demonstrating superior performance compared to previously reported dry electrodes.</p>","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":" 18","pages":" 8446-8461"},"PeriodicalIF":30.8,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ee/d5ee03240g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}