能源化学最新文献

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Electronic structure and spin state regulation of vanadium nitride via a sulfur doping strategy toward flexible zinc-air batteries 柔性锌-空气电池中硫掺杂氮化钒的电子结构和自旋态调控
IF 13.1 1区 化学
能源化学 Pub Date : 2023-11-03 DOI: 10.1016/j.jechem.2023.10.024
Daijie Deng , Honghui Zhang , Jianchun Wu , Xing Tang , Min Ling , Sihua Dong , Li Xu , Henan Li , Huaming Li
{"title":"Electronic structure and spin state regulation of vanadium nitride via a sulfur doping strategy toward flexible zinc-air batteries","authors":"Daijie Deng ,&nbsp;Honghui Zhang ,&nbsp;Jianchun Wu ,&nbsp;Xing Tang ,&nbsp;Min Ling ,&nbsp;Sihua Dong ,&nbsp;Li Xu ,&nbsp;Henan Li ,&nbsp;Huaming Li","doi":"10.1016/j.jechem.2023.10.024","DOIUrl":"10.1016/j.jechem.2023.10.024","url":null,"abstract":"<div><p>Owing to the distinctive structural characteristics, vanadium nitride (VN) is highly regarded as a catalyst for oxygen reduction reaction (ORR) in zinc-air batteries (ZABs). However, VN exhibits limited intrinsic ORR activity due to the weak adsorption ability to O-containing species. Here, the S-doped VN anchored on N, S-doped multi-dimensional carbon (S-VN/Co/NS-MC) was constructed using the solvothermal and in-situ doping methods. Incorporating sulfur atoms into VN species alters the electron spin state of vanadium in the S-VN/Co/NS-MC for regulating the adsorption energy of vanadium sites to oxygen molecules. The introduced sulfur atoms polarize the V 3<em>d<sub>z</sub></em><sup>2</sup> electrons, shifting spin-down electrons closer to the Fermi level in the S-VN/Co/NS-MC. Consequently, the introduction of sulfur atoms into VN species enhances the adsorption energy of vanadium sites for oxygen molecules. The *OOH dissociation transitions from being unspontaneous on the VN surface to a spontaneous state on the S-doped VN surface. Then, the ORR barrier on the S-VN/Co/NS-MC surface is reduced. The S-VN/Co/NS-MC demonstrates a higher half-wave potential and limiting current density compared to the VN/Co/N-MC. The S-VN/Co/NS-MC-based liquid ZABs display a power density of 195.7 mW cm<sup>−2</sup>, a specific capacity of 815.7 mA h g<sup>−1</sup>, and a cycling stability exceeding 250 h. The S-VN/Co/NS-MC-based flexible ZABs are successfully employed to charge both a smart watch and a mobile phone. This approach holds promise for advancing the commercial utilization of VN-based catalysts in ZABs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 239-249"},"PeriodicalIF":13.1,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135411317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Challenges and opportunities for battery health estimation: Bridging laboratory research and real-world applications 电池健康评估的挑战和机遇:连接实验室研究和实际应用
IF 13.1 1区 化学
能源化学 Pub Date : 2023-11-03 DOI: 10.1016/j.jechem.2023.10.032
Te Han , Jinpeng Tian , C.Y. Chung , Yi-Ming Wei
{"title":"Challenges and opportunities for battery health estimation: Bridging laboratory research and real-world applications","authors":"Te Han ,&nbsp;Jinpeng Tian ,&nbsp;C.Y. Chung ,&nbsp;Yi-Ming Wei","doi":"10.1016/j.jechem.2023.10.032","DOIUrl":"10.1016/j.jechem.2023.10.032","url":null,"abstract":"","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 434-436"},"PeriodicalIF":13.1,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135410124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interfacial built-in electric field and crosslinking pathways enabling WS2/Ti3C2Tx heterojunction with robust sodium storage at low temperature 界面内置电场和交联通路使WS2/Ti3C2Tx异质结在低温下具有强大的钠储存能力
IF 13.1 1区 化学
能源化学 Pub Date : 2023-11-02 DOI: 10.1016/j.jechem.2023.10.037
Jiabao Li , Shaocong Tang , Jingjing Hao , Quan Yuan , Tianyi Wang , Likun Pan , Jinliang Li , Shenbo Yang , Chengyin Wang
{"title":"Interfacial built-in electric field and crosslinking pathways enabling WS2/Ti3C2Tx heterojunction with robust sodium storage at low temperature","authors":"Jiabao Li ,&nbsp;Shaocong Tang ,&nbsp;Jingjing Hao ,&nbsp;Quan Yuan ,&nbsp;Tianyi Wang ,&nbsp;Likun Pan ,&nbsp;Jinliang Li ,&nbsp;Shenbo Yang ,&nbsp;Chengyin Wang","doi":"10.1016/j.jechem.2023.10.037","DOIUrl":"10.1016/j.jechem.2023.10.037","url":null,"abstract":"<div><p>Developing efficient energy storage for sodium-ion batteries (SIBs) by creating high-performance heterojunctions and understanding their interfacial interaction at the atomic/molecular level holds promise but is also challenging. Besides, sluggish reaction kinetics at low temperatures restrict the operation of SIBs in cold climates. Herein, cross-linking nanoarchitectonics of WS<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<em><sub>x</sub></em> heterojunction, featuring built-in electric field (BIEF), have been developed, employing as a model to reveal the positive effect of heterojunction design and BIEF for modifying the reaction kinetics and electrochemical activity. Particularly, the theoretical analysis manifests the discrepancy in work functions leads to the electronic flow from the electron-rich Ti<sub>3</sub>C<sub>2</sub>T<em><sub>x</sub></em> to layered WS<sub>2</sub>, spontaneously forming the BIEF and “ion reservoir” at the heterogeneous interface. Besides, the generation of cross-linking pathways further promotes the transportation of electrons/ions, which guarantees rapid diffusion kinetics and excellent structure coupling. Consequently, superior sodium storage performance is obtained for the WS<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<em><sub>x</sub></em> heterojunction, with only 0.2% decay per cycle at 5.0 A g<sup>−1</sup> (25 °C) up to 1000 cycles and a high capacity of 293.5 mA h g<sup>−1</sup> (0.1 A g<sup>−1</sup> after 100 cycles) even at −20 °C. Importantly, the spontaneously formed BIEF, accompanied by “ion reservoir”, in heterojunction provides deep understandings of the correlation between structure fabricated and performance obtained.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 635-645"},"PeriodicalIF":13.1,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135410225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Arbitrary skin metallization by pencil-writing inspired solid-ink rubbing for advanced energy storage and harvesting 铅笔书写的任意皮肤金属化激发了固体墨水摩擦的灵感,用于先进的能量储存和收集
1区 化学
能源化学 Pub Date : 2023-10-31 DOI: 10.1016/j.jechem.2023.10.030
Yonghan Zhou, Zhongfeng Ji, Wenrui Cai, Xuewei He, Ruiying Bao, Xuewei Fu, Wei Yang, Yu Wang
{"title":"Arbitrary skin metallization by pencil-writing inspired solid-ink rubbing for advanced energy storage and harvesting","authors":"Yonghan Zhou,&nbsp;Zhongfeng Ji,&nbsp;Wenrui Cai,&nbsp;Xuewei He,&nbsp;Ruiying Bao,&nbsp;Xuewei Fu,&nbsp;Wei Yang,&nbsp;Yu Wang","doi":"10.1016/j.jechem.2023.10.030","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.10.030","url":null,"abstract":"<div><p>The development of a durable metallic coating on diverse substrates is both intriguing and challenging, particularly in the research of metal-conductive materials for applications such as batteries, soft electronics, and beyond. Herein, by learning from the pencil-writing process, a facile solid-ink rubbing technology (SIR-tech) is invented to address the above challenge. The solid-ink is exampled by rational combination of liquid metal and graphite particles. By harnessing the synergistic effects between rubbing and adhesion, controllable metallic skin is successfully formed onto metals, woods, ceramics, and plastics without limitation in size and shape. Moreover, outperforming pure liquid-metal coating, the composite metallic skin by SIR-tech is very robust due to the self-lamination of graphite nanoplate exfoliated by liquid-metal rubbing. The critical factors controlling the structures-properties of the composite metallic skin have been systematically investigated as well. For applications, the SIR-tech is demonstrated to fabricate high-performance composite current collectors for next-generation batteries without traditional metal foils. Meanwhile, advanced skin-electrodes are further demonstrated for stable triboelectricity generation even under temperature fluctuation from −196 to 120 °C. This facile and highly-flexible SIR-tech may work as a powerful platform for the studies on functional coatings by liquid metals and beyond.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 592-602"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92212742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flame-retardant ammonium polyphosphate/MXene decorated carbon foam materials as polysulfide traps for fire-safe and stable lithium-sulfur batteries 阻燃聚磷酸铵/MXene装饰碳泡沫材料作为防火稳定锂硫电池的聚硫捕集器
IF 13.1 1区 化学
能源化学 Pub Date : 2023-10-31 DOI: 10.1016/j.jechem.2023.10.029
Yang Li , Yong-Cheng Zhu , Sowjanya Vallem , Man Li , Seunghyun Song , Tao Chen , Long-Cheng Tang , Joonho Bae
{"title":"Flame-retardant ammonium polyphosphate/MXene decorated carbon foam materials as polysulfide traps for fire-safe and stable lithium-sulfur batteries","authors":"Yang Li ,&nbsp;Yong-Cheng Zhu ,&nbsp;Sowjanya Vallem ,&nbsp;Man Li ,&nbsp;Seunghyun Song ,&nbsp;Tao Chen ,&nbsp;Long-Cheng Tang ,&nbsp;Joonho Bae","doi":"10.1016/j.jechem.2023.10.029","DOIUrl":"10.1016/j.jechem.2023.10.029","url":null,"abstract":"<div><p>Lithium-sulfur (Li-S) batteries are one of the most promising modern-day energy supply systems because of their high theoretical energy density and low cost. However, the development of high-energy density Li-S batteries with high loading of flammable sulfur faces the challenges of electrochemical performance degradation owing to the shuttle effect and safety issues related to fire or explosion accidents. In this work, we report a three-dimensional (3D) conductive nitrogen-doped carbon foam supported electrostatic self-assembled MXene-ammonium polyphosphate (NCF-MXene-APP) layer as a heat-resistant, thermally-insulated, flame-retardant, and freestanding host for Li-S batteries with a facile and cost-effective synthesis method. Consequently, through the use of NCF-MXene-APP hosts that strongly anchor polysulfides, the Li-S batteries demonstrate outstanding electrochemical properties, including a high initial discharge capacity of 1191.6 mA h g<sup>−1</sup>, excellent rate capacity of 755.0 mA h g<sup>−1</sup> at 1 C, and long-term cycling stability with an extremely low-capacity decay rate of 0.12% per cycle at 2 C. More importantly, these batteries can continue to operate reliably under high temperature or flame attack conditions. Thus, this study provides valuable insights into the design of safe high-performance Li-S batteries.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 313-323"},"PeriodicalIF":13.1,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136127368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Emerging perovskite materials for supercapacitors: Structure, synthesis, modification, advanced characterization, theoretical calculation and electrochemical performance 新型超级电容器用钙钛矿材料:结构、合成、改性、高级表征、理论计算和电化学性能
1区 化学
能源化学 Pub Date : 2023-10-31 DOI: 10.1016/j.jechem.2023.10.028
Yuehua Qian, Qingqing Ruan, Mengda Xue, Lingyun Chen
{"title":"Emerging perovskite materials for supercapacitors: Structure, synthesis, modification, advanced characterization, theoretical calculation and electrochemical performance","authors":"Yuehua Qian,&nbsp;Qingqing Ruan,&nbsp;Mengda Xue,&nbsp;Lingyun Chen","doi":"10.1016/j.jechem.2023.10.028","DOIUrl":"https://doi.org/10.1016/j.jechem.2023.10.028","url":null,"abstract":"<div><p>As a new generation electrode materials for energy storage, perovskites have attracted wide attention because of their unique crystal structure, reversible active sites, rich oxygen vacancies, and good stability. In this review, the design and engineering progress of perovskite materials for supercapacitors (SCs) in recent years is summarized. Specifically, the review will focus on four types of perovskites, perovskite oxides, halide perovskites, fluoride perovskites, and multi-perovskites, within the context of their intrinsic structure and corresponding electrochemical performance. A series of experimental variables, such as synthesis, crystal structure, and electrochemical reaction mechanism, will be carefully analyzed by combining various advanced characterization techniques and theoretical calculations. The applications of these materials as electrodes are then featured for various SCs. Finally, we look forward to the prospects and challenges of perovskite-type SCs electrodes, as well as the future research direction.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 41-70"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134688584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of safety valve types on the gas venting behavior and thermal runaway hazard severity of large-format prismatic lithium iron phosphate batteries 安全阀类型对大型柱形磷酸铁锂电池排气行为及热失控危险程度的影响
IF 13.1 1区 化学
能源化学 Pub Date : 2023-10-29 DOI: 10.1016/j.jechem.2023.09.052
Zhuangzhuang Jia , Yuanyuan Min , Peng Qin , Wenxin Mei , Xiangdong Meng , Kaiqiang Jin , Jinhua Sun , Qingsong Wang
{"title":"Effect of safety valve types on the gas venting behavior and thermal runaway hazard severity of large-format prismatic lithium iron phosphate batteries","authors":"Zhuangzhuang Jia ,&nbsp;Yuanyuan Min ,&nbsp;Peng Qin ,&nbsp;Wenxin Mei ,&nbsp;Xiangdong Meng ,&nbsp;Kaiqiang Jin ,&nbsp;Jinhua Sun ,&nbsp;Qingsong Wang","doi":"10.1016/j.jechem.2023.09.052","DOIUrl":"10.1016/j.jechem.2023.09.052","url":null,"abstract":"<div><p>The safety valve is an important component to ensure the safe operation of lithium-ion batteries (LIBs). However, the effect of safety valve type on the thermal runaway (TR) and gas venting behavior of LIBs, as well as the TR hazard severity of LIBs, are not known. In this paper, the TR and gas venting behavior of three 100 A h lithium iron phosphate (LFP) batteries with different safety valves are investigated under overheating. Compared to previous studies, the main contribution of this work is in studying and evaluating the effect of gas venting behavior and TR hazard severity of LFP batteries with three safety valve types. Two significant results are obtained: (I) the safety valve type dominates over gas venting pressure of battery during safety venting, the maximum gas venting pressure of LFP batteries with a round safety valve is 3320 Pa, which is one order of magnitude higher than other batteries with oval or cavity safety valve; (II) the LFP battery with oval safety valve has the lowest TR hazard as shown by the TR hazard assessment model based on gray-fuzzy analytic hierarchy process. This study reveals the effect of safety valve type on TR and gas venting, providing a clear direction for the safety valve design.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 195-207"},"PeriodicalIF":13.1,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136153962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanism of internal thermal runaway propagation in blade batteries 叶片电池内部热失控传播机理
IF 13.1 1区 化学
能源化学 Pub Date : 2023-10-29 DOI: 10.1016/j.jechem.2023.09.050
Xuning Feng, Fangshu Zhang, Wensheng Huang, Yong Peng, Chengshan Xu, Minggao Ouyang
{"title":"Mechanism of internal thermal runaway propagation in blade batteries","authors":"Xuning Feng,&nbsp;Fangshu Zhang,&nbsp;Wensheng Huang,&nbsp;Yong Peng,&nbsp;Chengshan Xu,&nbsp;Minggao Ouyang","doi":"10.1016/j.jechem.2023.09.050","DOIUrl":"10.1016/j.jechem.2023.09.050","url":null,"abstract":"<div><p>Blade batteries are extensively used in electric vehicles, but unavoidable thermal runaway is an inherent threat to their safe use. This study experimentally investigated the mechanism underlying thermal runaway propagation within a blade battery by using a nail to trigger thermal runaway and thermocouples to track its propagation inside a cell. The results showed that the internal thermal runaway could propagate for up to 272 s, which is comparable to that of a traditional battery module. The velocity of the thermal runaway propagation fluctuated between 1 and 8 mm s<sup>−1</sup>, depending on both the electrolyte content and high-temperature gas diffusion. In the early stages of thermal runaway, the electrolyte participated in the reaction, which intensified the thermal runaway and accelerated its propagation. As the battery temperature increased, the electrolyte evaporated, which attenuated the acceleration effect. Gas diffusion affected thermal runaway propagation through both heat transfer and mass transfer. The experimental results indicated that gas diffusion accelerated the velocity of thermal runaway propagation by 36.84%. We used a 1D mathematical model and confirmed that convective heat transfer induced by gas diffusion increased the velocity of thermal runaway propagation by 5.46%–17.06%. Finally, the temperature rate curve was analyzed, and a three-stage mechanism for internal thermal runaway propagation was proposed. In Stage I, convective heat transfer from electrolyte evaporation locally increased the temperature to 100 °C. In Stage II, solid heat transfer locally increases the temperature to trigger thermal runaway. In Stage III, thermal runaway sharply increases the local temperature. The proposed mechanism sheds light on the internal thermal runaway propagation of blade batteries and offers valuable insights into safety considerations for future design.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 184-194"},"PeriodicalIF":13.1,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136152572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Coupling Sb2WO6 microflowers and conductive polypyrrole for efficient potassium storage by enhanced conductivity and K+ diffusivity Sb2WO6微花与导电聚吡咯偶联可通过提高电导率和K+扩散率实现高效钾储存
IF 13.1 1区 化学
能源化学 Pub Date : 2023-10-27 DOI: 10.1016/j.jechem.2023.10.018
Ruiqi Tian , Hehe Zhang , Zeyu Yuan , Yuehua Man , Jianlu Sun , Jianchun Bao , Ming-Sheng Wang , Xiaosi Zhou
{"title":"Coupling Sb2WO6 microflowers and conductive polypyrrole for efficient potassium storage by enhanced conductivity and K+ diffusivity","authors":"Ruiqi Tian ,&nbsp;Hehe Zhang ,&nbsp;Zeyu Yuan ,&nbsp;Yuehua Man ,&nbsp;Jianlu Sun ,&nbsp;Jianchun Bao ,&nbsp;Ming-Sheng Wang ,&nbsp;Xiaosi Zhou","doi":"10.1016/j.jechem.2023.10.018","DOIUrl":"10.1016/j.jechem.2023.10.018","url":null,"abstract":"<div><p>Although metal oxide compounds are considered as desirable anode materials for potassium-ion batteries (PIBs) due to their high theoretical capacity, the large volume variation remains a key issue in realizing metal oxide anodes with long cycle life and excellent rate property. In this study, polypyrrole-encapsulated Sb<sub>2</sub>WO<sub>6</sub> (denoted Sb<sub>2</sub>WO<sub>6</sub>@PPy) microflowers are synthesized by a one-step hydrothermal method followed by in-situ polymerization and coating by pyrrole. Leveraging the nanosheet-stacked Sb<sub>2</sub>WO<sub>6</sub> microflower structure, the improved electronic conductivity, and the architectural protection offered by the PPy coating, Sb<sub>2</sub>WO<sub>6</sub>@PPy exhibits boosted potassium storage properties, thereby demonstrating an outstanding rate property of 110.3 mA h g<sup>−1</sup> at 5 A g<sup>−1</sup> and delivering a long-period cycling stability with a reversible capacity of 197.2 mA h g<sup>−1</sup> after 500 cycles at 1 A g<sup>−1</sup>. In addition, the conversion and alloying processes of Sb<sub>2</sub>WO<sub>6</sub>@PPy in PIBs with the generation of intermediates, K<sub>2</sub>WO<sub>4</sub> and K<sub>3</sub>Sb, is determined by X-ray photoelectron spectroscopy, transmission electron microscopy, and ex-situ X-ray diffraction during potassiation/depotassiation. Density functional theory calculations demonstrate that the robust coupling between PPy and Sb<sub>2</sub>WO<sub>6</sub> endues it with a much stronger total density of states and a built-in electric field, thereby increasing the electronic conductivity, and thus effectively reduces the K<sup>+</sup> diffusion barrier.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 250-258"},"PeriodicalIF":13.1,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136092962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lithium-ion and solvent co-intercalation enhancing the energy density of fluorinated graphene cathode 锂离子与溶剂共插层提高了氟化石墨烯阴极的能量密度
IF 13.1 1区 化学
能源化学 Pub Date : 2023-10-26 DOI: 10.1016/j.jechem.2023.10.019
Hao Wang , Jie Jiang , Pengyu Chen , Zhenrui Wu , Xiaobin Niu , Chuying Ouyang , Jian Liu , Liping Wang
{"title":"Lithium-ion and solvent co-intercalation enhancing the energy density of fluorinated graphene cathode","authors":"Hao Wang ,&nbsp;Jie Jiang ,&nbsp;Pengyu Chen ,&nbsp;Zhenrui Wu ,&nbsp;Xiaobin Niu ,&nbsp;Chuying Ouyang ,&nbsp;Jian Liu ,&nbsp;Liping Wang","doi":"10.1016/j.jechem.2023.10.019","DOIUrl":"10.1016/j.jechem.2023.10.019","url":null,"abstract":"<div><p>Fluorinated carbons CF<em><sub>x</sub></em> hold the highest theoretical energy density (e.g., 2180 W h kg<sup>−1</sup> when <em>x</em> = 1) among all cathode materials of lithium primary batteries. However, the low conductivity and severe polarization limit it to achieve its theory. In this study, we design a new electrolyte, namely 1 M LiBF<sub>4</sub> DMSO:DOL (1:9 vol.), achieving a high energy density in Li/CF<em><sub>x</sub></em> primary cells. The DMSO with a small molecular size and high donor number successfully solvates Li<sup>+</sup> into a defined Li<sup>+</sup>-solvation structure. Such solvated Li<sup>+</sup> can intercalate into the large-spacing carbon layers and achieve an improved capacity. Consequently, when discharged to 1.0 V, the CF<sub>1.12</sub> cathode demonstrates a specific capacity of 1944 mA h g<sup>−1</sup> with a specific energy density of 3793 W h kg<sup>−1</sup>. This strategy demonstrates that designing the electrolyte is powerful in improving the electrochemical performance of CF<em><sub>x</sub></em> cathode.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"89 ","pages":"Pages 208-215"},"PeriodicalIF":13.1,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136093595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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