法拉第效率
阴极
原子轨道
过渡金属
电化学
锰
氧化还原
材料科学
锂(药物)
化学
纳米技术
电极
无机化学
物理
电子
催化作用
物理化学
冶金
有机化学
量子力学
医学
内分泌学
作者
Tao Zeng,Ziqin Jiao,Xiaoyu Gao,Maolin Yang,Xiaohu Wang,Wenguang Zhao,Wei Tang,Mihai Chu,Ze He,Jinqi Li,Zhongyuan Huang,Guojie Chen,Ziwei Chen,Rui Wang,Liming Wang,Junrong Zhang,Lunhua He,Yuguang Pu,Yinguo Xiao
出处
期刊:Angewandte Chemie
[Wiley]
日期:2025-05-06
卷期号:64 (28): e202501777-e202501777
被引量:31
标识
DOI:10.1002/anie.202501777
摘要
Abstract Li‐rich manganese‐based oxides (LRMO) are promising cathode materials for next‐generation lithium‐ion batteries due to their high‐capacity and low‐cost merits. However, the low initial coulombic efficiency (ICE) and irreversible oxygen release of LRMO severely hinder their commercialization processes. Here, we employ glyoxal treatment to modulate the hybridization between transition metal (TM) 3 d and oxygen (O) 2 p orbitals in LRMO. This approach is found to reduce the Co/Mn t 2g ‐O 2 p hybridization in LRMO while simultaneously activating the Co 2+ /Co 3+ redox below the Fermi level. Our findings demonstrate that tuning TM 3 d ‐O 2 p orbital hybridization can be a viable approach to improve the ICE of LMRO. Specifically, the ICE of LRMO can be elevated from 85.3% to 102.5%, and a high specific capacity of 291.2 mAh g −1 can be achieved at 0.1 C. Moreover, the treated LRMO cathodes exhibit significantly enhanced capacity retention.
科研通智能强力驱动
Strongly Powered by AbleSci AI