Recently, Professor Mu Shichun’s team and Professor Wu Jinsong 's team from the State Key Laboratory of Advanced Technology For Materials Synthesis and Processing had made important progress in the research of high-performance fast-charging positive electrode material for lithium metal batteries. The relevant findings have been published in Nature Communications under the title of “Entropy-increased LiMn2O4-based positive electrodes for fast charging lithium metal batteries”. State Key Laboratory of Advanced Technology For Materials Synthesis and Processing of WUT was the first completion unit. Prof. Mu Shichun and Prof. Wu Jinsong were the co-corresponding authors. Zeng Weihao, a doctoral student, was the primary author.
The paper proposes an efficient entropy regulation strategy by introducing five low valence cations (Cu, Fe, Mg, Ni, Zn) into the LiMn2O4 system to optimize entropy value. According to experiment data, the new material can maintain about 80% of its initial discharge capacity after 1000 cycles at 1.48 Ag-¹ (equivalent to 6A, or 600mAh) and 25°C, indicating that the battery equipped with this material could achieve fast charging within 4 to 5 minutes, greatly reducing the charging time. The research findings provide an important solution to address the growing performance needs of energy storage batteries.
Figure 1. Lattice Contraction and Strengthening of Mn-O Bonds in Entropy-Increased LiMn2O4-based Cathode Material
Figure 2. Electrochemical Reaction in EI-LMO and LMO
Weihao Zeng, Fanjie Xia, Juan Wang, Jinlong Yang, Haoyang Peng, Wei Shu, Quan Li, Hong Wang, Guan Wang, Shichun Mu*, Jinsong Wu*. Entropy-increased LiMn2O4-based positive electrodes for fast charging lithium metal batteries. Nature Communication, 2024, 15, 7371.
Paperl link: https://doi.org/10.1038/s41467-024-51168-1
Written by: Zeng Weihao, Huang Linglin
Rewritten by: Fan Yiwen
Edited by: Wang Jingjing, Li Tiantian
Source: State Key Laboratory of Advanced Technology For Materials Synthesis and Processing
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