Journal of Materials Chemistry A最新文献

Breaking the Symmetry of Sulfur Defect State via Atomic Substitution for Enhanced CO2 Photoreduction 通过原子置换打破硫缺陷态的对称性以增强二氧化碳光还原作用

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta06622g

Yingxin Ma, Haolan Tao, Xuyun Guo, Peinuo Yang, Dan Xing, Valeria Nicolosi, Yu Zhang, Cheng Lian, Bocheng Qiu

{"title":"Breaking the Symmetry of Sulfur Defect State via Atomic Substitution for Enhanced CO2 Photoreduction","authors":"Yingxin Ma, Haolan Tao, Xuyun Guo, Peinuo Yang, Dan Xing, Valeria Nicolosi, Yu Zhang, Cheng Lian, Bocheng Qiu","doi":"10.1039/d4ta06622g","DOIUrl":"https://doi.org/10.1039/d4ta06622g","url":null,"abstract":"Conventional sulfur vacancy, characterized by a symmetric coordination of metal cations (M1-SV-M1), typically serves as a catalytic site for CO2 chemisorption. However, the symmetric SV site, with a uniform charge distribution across adjacent metal sites, enables sluggish electron transfer kinetics for CO2 activation and dissociation, as well as a low defect-band center that renders photoexcited electrons less energetic. Herein, we introduced Cu dopant into SV-rich SnS2 nanosheets (Cu-SnS2-SV) to construct the asymmetric Cu-SV-Sn sites, which effectively steer CO2 photoreduction into CO with a production rate of 48.6 μmol g-1 h-1 in the absence of photosensitizer and scavenger, 18-fold higher than SnS2-SV with symmetric Sn-SV-Sn sites. The experimental investigations combined with theoretical simulations reveal that asymmetric Cu-SV-Sn structure, compared with symmetric Sn-SV-Sn structure, allows an upshift of the defect-band center, which significantly mitigates the energy loss associated with the electron relaxation from conduction band to defect band. Moreover, the advantages of the Cu-SV-Sn sites over the Sn-SV-Sn sites are demonstrated not only by the increased Sn-S covalency, which facilitates electron transfer from catalysts to adsorbates, but also by the improved ability to stabilize the COOH* intermediates, which lowers the activation energy barrier of the rate-determining step.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dendrite suppression by scalable acid treatment of zinc metal anodes for aqueous zinc-ion batteries 通过对锌-离子水电池用锌金属阳极进行可扩展的酸处理抑制枝晶的产生

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta04922e

Huanlin Lyu, Suihan Cui, Chao Huang, Qingdong Ruan, Xiaolin Zhang, Junmin Xu, Fangyu Xiong, Dan Li, Paul K. Chu

{"title":"Dendrite suppression by scalable acid treatment of zinc metal anodes for aqueous zinc-ion batteries","authors":"Huanlin Lyu, Suihan Cui, Chao Huang, Qingdong Ruan, Xiaolin Zhang, Junmin Xu, Fangyu Xiong, Dan Li, Paul K. Chu","doi":"10.1039/d4ta04922e","DOIUrl":"https://doi.org/10.1039/d4ta04922e","url":null,"abstract":"Aqueous zinc-ion batteries (ZIBs) are desirable energy storage devices because of their low cost, safety, abundant Zn reserve, and environmental friendliness. However, Zn dendrite growth remains the main reason limiting the life span of ZIBs. Herein, a quick, simple, and scalable hydrochloric acid (HCl) treatment is designed to suppress the formation of Zn dendrites on Zn metal anodes. Scanning electron microscopy and atomic force microscopy reveal that the initial surface structure of the Zn metal anode determines the subsequent plating/stripping behavior. By soaking the Zn foil in HCl for 5 s (HCl-5 Zn), microgrooves are formed on the surface, but longer immersion destroys the special structure. This special microgroove structure homogenizes the electric field on the surface of the Zn plate, giving rise to more uniform Zn deposition. Compared to the pristine and over-processed Zn electrodes, HCl-5 Zn shows less Zn nucleation and smaller plating overpotentials resulting in suppression of Zn dendrites. Furthermore, HCl-5 Zn tends to deposit on the (002) plane of Zn to improve the cycling stability of the cell compared to the (001) plane of Zn. The symmetrical cell composed of the HCl-5 Zn anode exhibits small voltage hysteresis and excellent cycling stability. The cycling characteristics and low voltage polarization are improved, as demonstrated by the assembled symmetrical and full batteries comprising the K0.5V2O5@CC cathode. Moreover, the strategy is suitable for flexible batteries with hydrogel as the electrolyte. The results reveal a simple strategy to minimize dendrite formation and provide insights into the commercial development of ZIBs.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frustrated lewis pair chemistry in 2D CeO₂ for efficient alkaline hydrogen evolution 二维 CeO₂中受挫路易斯对化学反应促进高效碱性氢进化

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta06191h

Kaisi Liu, Tongtong Liu, Xinyi Wu, Jiao Dai, Qingjun Chen, Jun Wan, Lei Liu

{"title":"Frustrated lewis pair chemistry in 2D CeO₂ for efficient alkaline hydrogen evolution","authors":"Kaisi Liu, Tongtong Liu, Xinyi Wu, Jiao Dai, Qingjun Chen, Jun Wan, Lei Liu","doi":"10.1039/d4ta06191h","DOIUrl":"https://doi.org/10.1039/d4ta06191h","url":null,"abstract":"The alkaline hydrogen evolution reaction (HER) is pivotal for sustainable energy production but is hindered by sluggish kinetics due to the necessity of water dissociation to supply protons, which presents a high energy barrier. To overcome this challenge, a novel approach is proposed involving the introduction and tuning of oxygen vacancies on the surface of CeO2 to construct and control frustrated Lewis pairs (FLPs) with dual active sites for enhanced water dissociation. First-principles calculations reveal that increasing the number of oxygen vacancies significantly improves the quantity and activity of FLP sites for efficient water dissociation. Guided by these calculations, 2D CeO2 nanosheets with varying concentrations of oxygen vacancies were synthesized, showing that those with the highest vacancy content exhibit exceptional HER performance, with an overpotential of 132 mV and a Tafel slope of 73 mV·dec-1. These findings validate the theoretical model and underscore the potential of 2D CeO2 with FLP active sites as effective and stable HER catalysts. This study is anticipated to inform the development of advanced catalysts with FLP active sites for hydrogen evolution reactions in alkaline media.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Bi–Cu bimetallene array/carbonic anhydrase biohybrid for efficient and selective CO2 electroreduction at low concentration 用于低浓度下高效和选择性二氧化碳电还原的双铜双金属阵列/碳酸酐酶生物混合物

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta05445h

Minli Shu, Xuefang Zhu, Zhe Wang, Xue Xiao, Shuni Li, Yu Chen, Yucheng Jiang

{"title":"A Bi–Cu bimetallene array/carbonic anhydrase biohybrid for efficient and selective CO2 electroreduction at low concentration","authors":"Minli Shu, Xuefang Zhu, Zhe Wang, Xue Xiao, Shuni Li, Yu Chen, Yucheng Jiang","doi":"10.1039/d4ta05445h","DOIUrl":"https://doi.org/10.1039/d4ta05445h","url":null,"abstract":"The dramatic increase in CO2 emission has caused extreme weather events in recent years. Electrocatalytic CO2 reduction reaction (CO2RR) to useful fuels is an effective way of solving CO2 emission. However, serious hydrogen reaction evolution interference and low Faraday efficiency restrict its large-scale application, especially at low CO2 concentrations. This study presents a novel biohybrid comprising Bi–Cu bimetallenes (Bi–Cu BMLs) and carbonic anhydrase (CA) for efficient and selective electroreduction of CO2 to formic acid at low CO2 concentration. Ultra-thin Bi–Cu BMLs were synthesized via a facile galvanic replacement reaction, providing abundant sites for CA immobilization. The incorporation of Bi effectively suppresses the hydrogen evolution reaction and enhances the selectivity of the formic acid product, while the immobilized CA significantly increases the local CO2 concentration at the electrode surface due to its exceptional CO2 hydration activity and rapidly reversible equilibrium. As a result, the CA/Bi–Cu BML biohybrid system demonstrates remarkable performance, achieving 100% selectivity and 88.57% faradaic efficiency for formic acid production. Notably, the system maintains a high faradaic efficiency of 77.58% even at 5% CO2 concentration. Furthermore, the biohybrid catalyst exhibits excellent stability and reusability, underscoring its potential for practical applications in dilute CO2 streams.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DFT screening of dual-atom catalysts on carbon nanotubes for enhanced oxygen reduction reaction and oxygen evolution reaction: comparing dissociative and associative mechanisms 用于增强氧还原反应和氧进化反应的碳纳米管双原子催化剂的 DFT 筛选：比较离解机制和关联机制

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta03519d

Xiangyi Zhou, Mohsen Tamtaji, Weijun Zhou, William A. Goddard III, GuanHua Chen

{"title":"DFT screening of dual-atom catalysts on carbon nanotubes for enhanced oxygen reduction reaction and oxygen evolution reaction: comparing dissociative and associative mechanisms","authors":"Xiangyi Zhou, Mohsen Tamtaji, Weijun Zhou, William A. Goddard III, GuanHua Chen","doi":"10.1039/d4ta03519d","DOIUrl":"https://doi.org/10.1039/d4ta03519d","url":null,"abstract":"Dual-atom catalysts (DACs) are promising for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). However, two vital factors, namely curvature effects and dissociative mechanisms, are often overlooked in DAC studies, which may miss the possibility of finding the most promising candidates. To provide a mechanistic understanding of the role of these two essential factors in effective electrocatalyst design, we explore systematically the catalytic potential of MM′N6-DACs supported on graphene and single-walled carbon nanotubes (CNTs) with two diameters within both dissociative and associative mechanisms where M and M′ represent Fe, Co, Ni, Cu, Ru, Rh, Pd, or Pt metals. More than ten DACs have shown high activity with overpotential lower than that of common commercial catalysts, notably non-precious CoCuN6-DACs exhibiting extremely low ORR overpotential of 0.09 VRHE and low OER overpotential of 0.10 VRHE, and bifunctional ORR and OER overpotential of 0.22 VRHE. We find that CNT substrates strengthen the adsorption of intermediates on CoCuN6-DACs compared to graphene substrates, due to increased electronic density of states of metal atoms near the Fermi level. The dissociative mechanism circumvents the constraints of scaling relationship in the associative mechanism, so that several DACs favoring the dissociative mechanism exhibit substantially improved activity, with lower overpotential than the theoretical minimum of the associative mechanism. These results not only shed light on designing high-performance catalysts for the ORR and OER but also deepen the theoretical understanding of the catalytic mechanism and curvature effects on DACs.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrolyte Strategies to Minimize Surface Reactivity for Improved Reversibility of H2 – H3 Phase Transition 尽量降低表面反应性以提高 H2 - H3 相变可逆性的电解质策略

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta05216a

J. Brandon Adamo, Arumugam Manthiram

{"title":"Electrolyte Strategies to Minimize Surface Reactivity for Improved Reversibility of H2 – H3 Phase Transition","authors":"J. Brandon Adamo, Arumugam Manthiram","doi":"10.1039/d4ta05216a","DOIUrl":"https://doi.org/10.1039/d4ta05216a","url":null,"abstract":"High-nickel layered oxide cathodes are promising candidates for application in next-generation lithium-ion batteries. However, they are plagued by high surface reactivity with electrolytes and poor reversibility of the high voltage H2 – H3 phase transition. While electrolytes generally impact cathode surface reactivity, herein we demonstrate that the use of advanced electrolytes can greatly improve the reversibility of the bulk H2 – H3 phase transition due to a reduction in surface reactivity and resultant surface reconstruction. We compare the ability of several common electrolyte enhancement strategies to improve the reversibility of the H2 – H3 phase transition with a LiNiO2 cathode. We find that while all strategies tested in this study improve the reversibility of the phase transition, a combination of fluorinated solvents and an LiPO2F2 additive yields the best results in galvanostatic cycling. We quantitatively measure the capacity loss in the H2 – H3 phase transition region with second derivative analysis and show that the degree of capacity fade is different in different phase transition regions. With galvanostatic intermittent titration technique and galvanostatic electrochemical impedance spectroscopy, we find that advanced electrolytes can reduce the resistance growth with cycling when passing through the H2 – H3 phase transition. With cyclic step chronoamperometry, we examine the evolution of the high-rate performance of the phase transition in each electrolyte and find that a combination of surface stabilization and conductivity are needed to optimize high-rate performance.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boosting Efficiency of Electrocatalytic Water Splitting via In-Situ Grown Transition Metal Sulfides: A Review 通过原位生长过渡金属硫化物提高电催化水分离效率：综述

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta06197g

haowei jia, Linghui Meng, Yile Lu, Tianyue Liang, Yu Yuan, Yifan Hu, Zekun Dong, Yingze Zhou, Peiyuan Guan, lu zhou, Chao Liu, Mengyao Li, Tao Wan, Bing‐Jie Ni, Zhaojun Han, Dewei Chu

{"title":"Boosting Efficiency of Electrocatalytic Water Splitting via In-Situ Grown Transition Metal Sulfides: A Review","authors":"haowei jia, Linghui Meng, Yile Lu, Tianyue Liang, Yu Yuan, Yifan Hu, Zekun Dong, Yingze Zhou, Peiyuan Guan, lu zhou, Chao Liu, Mengyao Li, Tao Wan, Bing‐Jie Ni, Zhaojun Han, Dewei Chu","doi":"10.1039/d4ta06197g","DOIUrl":"https://doi.org/10.1039/d4ta06197g","url":null,"abstract":"The grown needs for sustainable and efficient energy sources have heightened interest in electrocatalytic water splitting (EWS), a promising method for hydrogen production as a clean and renewable energy carrier. EWS, which splits water molecules into hydrogen and oxygen, faces efficiency challenges due to the slow kinetics of the oxygen evolution reaction (OER) at the anode and the hydrogen evolution reaction (HER) at the cathode. Developing effective electrocatalysts is essential to overcoming these limitations. Among the various electrocatalysts studied, transition metal sulfides (TMSs) have garnered significant attention due to their low cost and abundant active sites. Despite the superior electrochemical performance of TMSs compared to other materials, their inherent low conductivity and sluggish reaction kinetics remain major challenges. Recent advancements have focused on the in-situ growth of TMSs on conductive substrates to enhance electron transfer and overall catalytic performance, eliminating the need for polymer binders and improving electrode stability. This review provides an in-depth analysis of the key aspects involved in the synthesis of in-situ grown TMSs electrodes, including the selection of TMSs active materials, various substrates, and preparation strategies. The review then offers a comprehensive overview of different types of in-situ grown TMSs electrodes, with a focus on the most extensively researched materials: molybdenum sulfides, cobalt sulfides, nickel sulfides, and their composites. Finally, the limitations and future perspectives are discussed, highlighting potential directions for advancing the development of in-situ grown TMSs catalysts.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking Zn Storage Performance of Ammonium Vanadate Nanoflowers as High-Capacity Cathodes for Aqueous Zinc-ion Batteries via Potassium Ion and Ethylene Glycol Co-Intercalation Engineering 通过钾离子和乙二醇共钙化工程释放作为锌离子水电池高容量阴极的纳米钒酸铵的锌储存性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta04112g

Ji Chen, Xiaoyue Zhang, Yangjie Li, Xiaoying Li, Xiaoqin Zhang, Yuxiang Chen, Qiaoji Zheng, Xingqiao Wu, Heng Zhang, Xin Tan, Dunmin Lin

{"title":"Unlocking Zn Storage Performance of Ammonium Vanadate Nanoflowers as High-Capacity Cathodes for Aqueous Zinc-ion Batteries via Potassium Ion and Ethylene Glycol Co-Intercalation Engineering","authors":"Ji Chen, Xiaoyue Zhang, Yangjie Li, Xiaoying Li, Xiaoqin Zhang, Yuxiang Chen, Qiaoji Zheng, Xingqiao Wu, Heng Zhang, Xin Tan, Dunmin Lin","doi":"10.1039/d4ta04112g","DOIUrl":"https://doi.org/10.1039/d4ta04112g","url":null,"abstract":"Ammonium vanadate (NH4V4O10) is a highly promising cathode for aqueous zinc ion batteries (AZIBs) due to its tunable layered structure and high specific capacity; however, limited active sites, poor kinetics and irreversible structural collapse during cycling suppress its wide application. Herein, the engineering of the co-intercalation of K+ and ethylene glycol molecules is proposed to unlock Zn storage performance of the NH4V4O10. It is found that the co-intercalation of K+ and ethylene glycol enlarges the interlayer spacing to 11.5 Å, induces a high level of oxygen vacancies and enhances the strength of ionic bonding in the NH4V4O10, ensuring large Zn2+ diffusion channels, efficient redox reactivity and strong layered-structure stability. Meanwhile, K+ ions and ethylene glycol also weaken the crystallinity of NH4V4O10 and induce the transformation of microscopic morphology from strips to nanoflowers self-assembled from ultrathin nanosheets, promoting the transfer of electrons and ions and complete penetration of the electrolyte during electrochemical reactions. In addition, the band gap is significantly reduced by 0.2 eV after the co-intercalation of K+ and ethylene glycol, improving the electronic conductivity and decreasing the diffusion barrier of Zn2+. As expected, K+ and ethylene glycol co-intercalated NH4V4O10 exhibit excellent Zn storage properties, delivering an ultrahigh capacity of 614.1 mAh g-1 at 0.5 A g-1, and presenting an outstanding rate performance of 472.9 mAh g-1 and a high retention of 89% after 2000 cycles at 10 A g-1. This work provides a useful reference for unlocking the Zn storage performance of layered V-based cathodes for AZIBs by synergistically modulating interlayer spacing, oxygen defects and microscopic morphology of the materials.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic H2S/CO2 Selectivity in an Exceptionally Sterically Hindered Amine Membrane 特殊固有阻碍胺膜的动力学 H2S/CO2 选择性

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta04997g

Shraavya Rao, Xuepeng Deng, Changlong Zou, Babul Prasad, Yang Han, Li-Chiang Lin, W.S. Winston Ho

引用次数: 0

Improved high-voltage cycling stability of single-crystalline LiNi0.8Co0.1Mn0.1O2 cathode by tantalum doping 通过掺杂钽提高单晶镍钴锰酸锂正极的高压循环稳定性

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-09-27 DOI: 10.1039/d4ta04307c

Bokai Cao, Hai-Tao Fang, De Li, Yong Chen

{"title":"Improved high-voltage cycling stability of single-crystalline LiNi0.8Co0.1Mn0.1O2 cathode by tantalum doping","authors":"Bokai Cao, Hai-Tao Fang, De Li, Yong Chen","doi":"10.1039/d4ta04307c","DOIUrl":"https://doi.org/10.1039/d4ta04307c","url":null,"abstract":"The utilization of nickel-rich single-crystalline LiNi1−x−yCoxMnyO2 cathodes at elevated voltages encounters hindrances stemming from crack formation within micron-sized particles. While reducing particle dimensions offers a potential strategy to mitigate stress-induced cracking, it simultaneously exacerbates surface side reactions. Ta doping is presented to address these challenges, a Ta-doped single-crystalline LiNi0.8Co0.1Mn0.1O2 (Ta-SC) is engineered, integrating advantages of grain refinement and surface stability. Ta doping inhibits the growth of single crystals during sintering and suppresses the irreversible surface phase transition during cycling. Unlike the undoped SC cathode, which is susceptible to intragranular cracking, the Ta-SC cathode demonstrates excellent structural integrity upon high voltage cycling. This preservation of structural integrity in the Ta-SC cathode is attributed to homogeneous H2–H3 phase transition favoured by reduced kinetic barriers and short distance for Li+ diffusion. Benefitting from the structural stability, the Ta-SC cathode provides superior cycling stability. It maintains a coin cell capacity of 180.7 mA h g−1 and retains an energy density of 679.8 W h kg−1 after 200 cycles in the 2.8–4.8 V range at 1 C. This work highlights the potential of Ta doping as a general approach to improve the durability and electrochemical performance of layered cathode materials.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142324883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0