Reviving the rock-salt phases in Ni-rich layered cathodes by mechano-electrochemistry in all-solid-state batteries
ZHANG, Xuedong
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
SU, Yong
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
WAGEMAKER, Marnix
Section Storage of Electrochemical Energy, Department of Radiation Science and Technology, Faculty of Applied Sciences
Section Storage of Electrochemical Energy, Department of Radiation Science and Technology, Faculty of Applied Sciences
HUANG, Jianyu
Clean Nano Energy Center
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
< Reduce
Clean Nano Energy Center
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education
Language
en
Article de revue
This item was published in
Nano Energy. 2023, vol. 105, p. 108016 (10 p.)
Elsevier
English Abstract
The rock-salt phase (RSP) formed on the surface of Ni-rich layered cathodes in liquid-electrolyte lithium-ion batteries is conceived to be electrochemically "dead". Here we show massive RSP forms in the interior of ...Read more >
The rock-salt phase (RSP) formed on the surface of Ni-rich layered cathodes in liquid-electrolyte lithium-ion batteries is conceived to be electrochemically "dead". Here we show massive RSP forms in the interior of LiNixMnyCo(1−x-y)O2 (NMC) crystals in sulfide based all solid state batteries (ASSBs), but the RSP remains electrochemically active even after long cycles. The RSP and the layered structure constitute a two-phase mixture, a material architecture that is distinctly different from the RSP in liquid electrolytes. The tensioned layered phase affords an effective percolation channel into which lithium is squeezed out of the RSPs by compressive stress, rendering the RSPs electrochemically active. Consequently, the ASSBs with predominant RSP in the NMC cathode deliver remarkable long cycle life of 4000 cycles at high areal capacity of 4.3 mAh/cm2. Our study unveils distinct mechano-electrochemistry of RSPs in ASSBs that can be harnessed to enable high energy density and durable ASSBs.Read less <
Origin
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