首页|In-situ coating and surface partial protonation co-promoting performance of single-crystal nickel-rich cathode in all-solid-state batteries

In-situ coating and surface partial protonation co-promoting performance of single-crystal nickel-rich cathode in all-solid-state batteries

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The poor electrochemical performance of all-solid-state batteries(ASSBs),which is assemblied by Ni-rich cathode and poly(ethylene oxide)(PEO)-based electrolytes,can be attributed to unstable cathodic inter-face and poor crystal structure stability of Ni-rich cathode.Several coating strategies are previously employed to enhance the stability of the cathodic interface and crystal structure for Ni-rich cathode.However,these methods can hardly achieve simplicity and high efficiency simultaneously.In this work,polyacrylic acid(PAA)replaced traditional PVDF as a binder for cathode,which can achieve a uniform PAA-Li(LixPAA(0＜x ≤ 1))coating layer on the surface of single-crystal LiNi0.83Co0.12Mn0.05O2(SC-NCM83)due to H+/Li+exchange reaction during the initial charging-discharging process.The formation of PAA-Li coating layer on cathode can promote interfacial Li+transport and enhance the stability of the cathodic interface.Furthermore,the partially-protonated surface of SC-NCM83 casued by H+/Li+exchange reaction can restrict Ni ions transport to enhance the crystal structure stability.The proposed SC-NCM83-PAA exhibits superior cycling performance with a retention of 92％compared with that(57.3％)of SC-NCM83-polyvinylidene difluoride(PVDF)after 200 cycles.This work provides a practical strategy to construct high-performance cathodes for ASSBs.

Single-crystal LiNi0.83Co0.12Mn0.05O2In-situ coatingPAA-Li,Partial protonation

Maoyi Yi、Jie Li、Mengran Wang、Xinming Fan、Bo Hong、Zhian Zhang、Aonan Wang、Yanqing Lai

展开 >

School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China

Engineering Research Centre of Advanced Battery Materials,The Ministry of Education,Changsha 410083,Hunan,China

Hunan Province Key Laboratory of Nonferrous Value-Added Metallurgy,Central South University,Changsha 410083,Hunan,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Innovation Program of Hunan ProvinceChangsha Municipal Natural Science Foundation

52034011522043282023RC305kq2202085

2024

10.1016/j.jechem.2023.09.046

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
  • 45