Yingcong Liu, Xing Zhou, Dongwei He, Xiaowei Liu, Chao Yang, Dawei Xu, Meilong Wang, Ruitao Sun, Bin Zhang, Jingjing Xie, Jin Han, Wen Chen, Ya You
{"title":"NaTiOx-modified high-nickel layered oxide cathode for stable sodium-ion batteries","authors":"Yingcong Liu, Xing Zhou, Dongwei He, Xiaowei Liu, Chao Yang, Dawei Xu, Meilong Wang, Ruitao Sun, Bin Zhang, Jingjing Xie, Jin Han, Wen Chen, Ya You","doi":"10.1002/cey2.627","DOIUrl":null,"url":null,"abstract":"<p>The O3-type layered cathode with high Ni content has attracted much attention because of its high capacity and simple synthesis process. However, surface side reaction and O3–P3 phase transitions would occur during Na<sup>+</sup> insertion/extraction, resulting in unsatisfying electrochemical performance. Herein, O3-Na[Ni<sub>0.6</sub>Co<sub>0.2</sub>Mn<sub>0.2</sub>]O<sub>2</sub> (NNCM622) cathode is modified by a NaTiO<sub><i>x</i></sub> coating layer in a wet chemistry method, which reduces the parasitic reaction and facilitates Na<sup>+</sup> migration. Simultaneously, the partially doped Ti improves structural stability by restraining the irreversible multiple-phase transition. As a result, the modified NNCM622 cathode obtains a high specific capacity of 143.4 mAh g<sup>−1</sup> and an improved capacity retention of 69% after 300 cycles. Our work offers new prospects for stabilizing the NNCM622 cathode with a feasible coating strategy.</p>","PeriodicalId":33706,"journal":{"name":"Carbon Energy","volume":"7 1","pages":""},"PeriodicalIF":19.5000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cey2.627","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon Energy","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cey2.627","RegionNum":1,"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
The O3-type layered cathode with high Ni content has attracted much attention because of its high capacity and simple synthesis process. However, surface side reaction and O3–P3 phase transitions would occur during Na+ insertion/extraction, resulting in unsatisfying electrochemical performance. Herein, O3-Na[Ni0.6Co0.2Mn0.2]O2 (NNCM622) cathode is modified by a NaTiOx coating layer in a wet chemistry method, which reduces the parasitic reaction and facilitates Na+ migration. Simultaneously, the partially doped Ti improves structural stability by restraining the irreversible multiple-phase transition. As a result, the modified NNCM622 cathode obtains a high specific capacity of 143.4 mAh g−1 and an improved capacity retention of 69% after 300 cycles. Our work offers new prospects for stabilizing the NNCM622 cathode with a feasible coating strategy.
高镍含量的o3型层状阴极因其高容量和简单的合成工艺而备受关注。但在Na+的插入/提取过程中会发生表面副反应和O3-P3相变，导致电化学性能不理想。本文采用湿化学方法对O3-Na[Ni0.6Co0.2Mn0.2]O2 （NNCM622）阴极进行了NaTiOx涂层修饰，减少了寄生反应，促进了Na+的迁移。同时，部分掺杂的Ti通过抑制不可逆多相转变提高了结构的稳定性。结果表明，改性后的NNCM622阴极具有143.4 mAh g−1的高比容量，300次循环后的容量保持率提高了69%。我们的工作为稳定NNCM622阴极提供了一个可行的涂层策略。
期刊介绍：
Carbon Energy is an international journal that focuses on cutting-edge energy technology involving carbon utilization and carbon emission control. It provides a platform for researchers to communicate their findings and critical opinions and aims to bring together the communities of advanced material and energy. The journal covers a broad range of energy technologies, including energy storage, photocatalysis, electrocatalysis, photoelectrocatalysis, and thermocatalysis. It covers all forms of energy, from conventional electric and thermal energy to those that catalyze chemical and biological transformations. Additionally, Carbon Energy promotes new technologies for controlling carbon emissions and the green production of carbon materials. The journal welcomes innovative interdisciplinary research with wide impact. It is indexed in various databases, including Advanced Technologies & Aerospace Collection/Database, Biological Science Collection/Database, CAS, DOAJ, Environmental Science Collection/Database, Web of Science and Technology Collection.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
