Li-Deficient Materials-Decoration Restrains Oxygen Evolution Achieving Excellent Cycling Stability of Li-Rich Mn-Based Cathode

被引:12
作者
Ji, Xueqian [1 ,2 ]
Xu, Yuxing [1 ,3 ]
Xia, Qing [1 ,3 ]
Zhou, Yuncheng [1 ,2 ]
Song, Jiechen [1 ,2 ]
Feng, Hailan [1 ,3 ]
Wang, Pengfei [1 ,3 ]
Yang, Jun [1 ]
Tan, Qiangqiang [1 ,2 ]
机构
[1] Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
[3] Hebei Technol Innovat Ctr Adv Energy Mat, Langfang 065001, Peoples R China
基金
中国国家自然科学基金;
关键词
KEYWORDS; lithium-ion batteries; layered cathode; oxygen evolution; surface modi fi cation; excellent cyclability; ENHANCED ELECTROCHEMICAL PERFORMANCE; IN-SITU; STORAGE PERFORMANCE; REDOX ACTIVITY; ANIONIC REDOX; OXIDE; LI1.2MN0.54NI0.13CO0.13O2; NANOTUBES; ORIGIN; RAMAN;
D O I
10.1021/acsami.2c03073
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
With the increasing demand for high energy density and rapid charging performance, Li-rich materials have been the up and coming cathodes for next-generation lithium-ion batteries. However, because of oxygen evolution and structural instability, the commercialization of Li-rich materials is extremely retarded by their poor electrochemical performances. In this work, Li-deficient materials Li0.3NbO2 and (Nb0.62Li0.15)TiO3 are applied to functionalize the surface of Li1.2Mn0.54Ni0.13Co0.13O2, aiming to suppress oxygen evolution and increase structural stability in LIBs. In addition, a fast Li-ion transport channel is beneficial to enhance Li+ diffusion kinetics. The results demonstrate that the electrodes decorated with Li0.3NbO2 and (Nb0.62Li0.15)TiO3 materials exhibit more stable cycling stability after long-term cycling and outstanding rate capability.
引用
收藏
页码:30133 / 30143
页数:11
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