TY  - JOUR
AU  - Kim, Un-Hyuck
AU  - Park, Geon-Tae
AU  - Son, Byoung-Ki
AU  - Nam, Gyeong Won
AU  - Liu, Jun
AU  - Kuo, Liang-Yin
AU  - Kaghazchi, Payam
AU  - Yoon, Chong S.
AU  - Sun, Yang-Kook
TI  - Heuristic solution for achieving long-term cycle stability for Ni-rich layered cathodes at full depth of discharge
JO  - Nature energy
VL  - 5
SN  - 2058-7546
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2020-03879
SP  - 860
PY  - 2020
AB  - The demand for energy sources with high energy densities continues to push the limits of Ni-rich layered oxides, which are currently the most promising cathode materials in automobile batteries. Although most current research is focused on extending battery life using Ni-rich layered cathodes, long-term cycling stability using a full cell is yet to be demonstrated. Here, we introduce Li[Ni0.90Co0.09Ta0.01]O2, which exhibits 90% capacity retention after 2,000 cycles at full depth of discharge (DOD) and a cathode energy density >850 Wh kg−1. In contrast, the currently most sought-after Li[Ni0.90Co0.09Al0.01]O2 cathode loses ~40% of its initial capacity within 500 cycles at full DOD. Cycling stability is achieved by radially aligned primary particles with [003] crystallographic texture that effectively dissipate the internal strain occurring in the deeply charged state, while the substitution of Ni3+ with higher valence ions induces ordered occupation of Ni ions in the Li slab and stabilizes the delithiated structure.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000571739400005
DO  - DOI:10.1038/s41560-020-00693-6
UR  - https://juser.fz-juelich.de/record/885498
ER  -