{"title":"A reversed strategy for designing high-performance anode material from traditional NaxV2O5 cathode","authors":"Jing Yao, Meichun He, Pengju Li, Chao Zhu, Dongmei Zhang, Cunyuan Pei, Bing Sun, Shibing Ni","doi":"10.1039/d4ta05683c","DOIUrl":null,"url":null,"abstract":"NaxV2O5 is one type of representative cathode material for Li-/Na-ion batteries owing to its relatively high potential vs. Li/Na. Herein, a novel NaxV2O5 anode was successfully designed and synthesized via a reversed strategy, i.e., tuning the Na content in NaxV2O5 cathode. Orthorhombic α'-NaxV2O5 (x≈0.67) is firstly demonstrated to be a new high-performance anode for lithium-ion batteries (LIBs). Benefiting from its layered structure and the reasonably intercalated Na+, the as-synthesized α'-NaxV2O5 displays a high reversible capacity (535.8 mAh g−1 at 0.2 A g−1), excellent rate capability and ultra-long cycle life (91.2% capacity retention after 10000 cycles). Furthermore, the exceptional performance of the α'-NaxV2O5 anode is showcased in an all-vanadium-based full cell. Importantly, the ex-situ XRD and XPS demonstrated that LizNaxV2O5 is the main and stable active material during cycling, and the lithium-ion storage process is mainly determined by pseudocapacitive behavior. This work brings new insights into the field of vanadate-based anode materials for LIBs.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta05683c","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
NaxV2O5 is one type of representative cathode material for Li-/Na-ion batteries owing to its relatively high potential vs. Li/Na. Herein, a novel NaxV2O5 anode was successfully designed and synthesized via a reversed strategy, i.e., tuning the Na content in NaxV2O5 cathode. Orthorhombic α'-NaxV2O5 (x≈0.67) is firstly demonstrated to be a new high-performance anode for lithium-ion batteries (LIBs). Benefiting from its layered structure and the reasonably intercalated Na+, the as-synthesized α'-NaxV2O5 displays a high reversible capacity (535.8 mAh g−1 at 0.2 A g−1), excellent rate capability and ultra-long cycle life (91.2% capacity retention after 10000 cycles). Furthermore, the exceptional performance of the α'-NaxV2O5 anode is showcased in an all-vanadium-based full cell. Importantly, the ex-situ XRD and XPS demonstrated that LizNaxV2O5 is the main and stable active material during cycling, and the lithium-ion storage process is mainly determined by pseudocapacitive behavior. This work brings new insights into the field of vanadate-based anode materials for LIBs.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.