Interface Engineering via Constructing Enhanced Ligand Enables Highly Stable Li‐Rich Layered Oxide Cathode

• DOI: 10.1002/adfm.202314528
• Publication Date: 2024-03-21T10:41:10Z
• Authors: Tao Zeng; Maolin Yang; Fuchang Sun; Zhongyuan Huang; Wenguang Zhao; Ziwei Chen; Dongwen Zou; Jimin Qiu; Lu Wang; Rui Wang; Chaohong Zhang; Tingting Yang; Wenhai Ji; Juping Xu; Wen Yin; Rui Li; Hong Meng; Yinguo Xiao
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract High‐energy‐density and cost‐effective lithium‐rich oxides (LRO) are considered as the promising cathode materials for next‐generation lithium‐ion batteries . Nevertheless, elevated cut‐off voltage complex interface interactions have presented significant challenges that can lead to material degradation. Specifically, inevitable release of lattice oxygen highly reactive interface‐driven irreversible migration transition metal (TM) ions in LRO make construction a robust extremely important. Herein, an effective efficient coating approach is applied stabilize structure by introducing coordination bond between strong ligand polyurethane (PU) surface particles. This functional stabilizes crystal field stabilization energies acting spectrochemistry form with Mn 4+ Li 2 MnO 3 at high voltage. Consequently, TM greatly inhibited. Overall, LRO‐PU exhibits superior electrochemical cyclability retention 80.0% 1C after 300 cycles enhanced rate capability 80.9% 0.1C cycles, marking step toward commercial implementation.