TY  - JOUR
AU  - Wang, Rui
AU  - Chen, Xin
AU  - Huang, Zhongyuan
AU  - Yang, Jinlong
AU  - Liu, Fusheng
AU  - Chu, Mihai
AU  - Liu, Tongchao
AU  - Wang, Chaoqi
AU  - Zhu, Weiming
AU  - Li, Shuankui
AU  - Li, Shunning
AU  - Zheng, Jiaxin
AU  - Chen, Jie
AU  - He, Lunhua
AU  - Jin, Lei
AU  - Pan, Feng
AU  - Xiao, Yinguo
TI  - Twin boundary defect engineering improves lithium-ion diffusion for fast-charging spinel cathode materials
JO  - Nature Communications
VL  - 12
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Nature Publishing Group UK
M1  - FZJ-2021-02516
SP  - 3085
PY  - 2021
AB  - Defect engineering on electrode materials is considered an effective approach to improve the electrochemical performance of batteries since the presence of a variety of defects with different dimensions may promote ion diffusion and provide extra storage sites. However, manipulating defects and obtaining an in-depth understanding of their role in electrode materials remain challenging. Here, we deliberately introduce a considerable number of twin boundaries into spinel cathodes by adjusting the synthesis conditions. Through high-resolution scanning transmission electron microscopy and neutron diffraction, the detailed structures of the twin boundary defects are clarified, and the formation of twin boundary defects is attributed to agminated lithium atoms occupying the Mn sites around the twin boundary. In combination with electrochemical experiments and first-principles calculations, we demonstrate that the presence of twin boundaries in the spinel cathode enables fast lithium-ion diffusion, leading to excellent fast charging performance, namely, 75% and 58% capacity retention at 5 C and 10 C, respectively. These findings demonstrate a simple and effective approach for fabricating fast-charging cathodes through the use of defect engineering.
LB  - PUB:(DE-HGF)16
C6  - 34035292
UR  - <Go to ISI:>//WOS:000658773300008
DO  - DOI:10.1038/s41467-021-23375-7
UR  - https://juser.fz-juelich.de/record/893036
ER  -