物理化学学报2026，Vol.42Issue(3)：159-172,14.DOI:10.1016/j.actphy.2025.100200
掺铬富锂锰基材料作为高性能全固态锂电池正极
Cr-doped lithium-rich manganese-based materials as a cathode for high-performance all-solid-state lithium batteries
摘要
Abstract
With prospects for high energy density and safety,all-solid-state lithium-ion batteries(ASSLBs)with lithium-rich manganese-based materials(LRMs)are exploited as next-generation energy storage systems.However,the severe interfacial degradations with halide solid electrolytes(SEs)caused by the irreversible oxygen release remain to be urgently solved.In this work,we synthesized Cr-substituted LRMs with high capacity and stability.The reversible redox of Cr3+/Cr6+contributes to an enhanced capacity,accompanied by the reversible migration of Cr6+ions between octahedral and tetrahedral sites,effectively maintaining the structural stability of LRMs.Meanwhile,the strong Cr-O bond can stabilize the lattice oxygen,establish a stable cathode/electrolyte interface,and alleviate the voltage decay.Therefore,the ASSBs with LRMs-Cr0.1 cathode and halide electrolyte show an excellent cycling stability with 0.065%capacity decay per cycle for 500 cycles at 0.5C.Notably,the LRMs-Cr0.1//Li21Si5@Si/C full cell exhibits outstanding long-term cyclability over 1000 cycles with nearly 100%capacity retention at 0.3C,corresponding to an energy density of 413.11 Wh kg-1.This work provides guidance for developing high energy-density solid-state batteries.关键词
全固态电池/富锂锰基材料/阴离子氧氧化还原/铬掺杂/Li21Si5@Si/C阳极Key words
All-solid-state battery/Lithium-rich manganese-based material/Anion oxygen redox/Chromium substitution/Li21Si5@Si/C anode分类
化学化工引用本文复制引用
高珂珂,许浩哲,刘兴坤,孙春文..掺铬富锂锰基材料作为高性能全固态锂电池正极[J].物理化学学报,2026,42(3):159-172,14.基金项目
The authors acknowledge the financial support of the National Natural Science Foundation of China(No.52472271)and the National Key R&D Program of China(No.2023YFE0115800). （No.52472271）
