Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (9): 1-8.doi: 10.19964/j.issn.1006-4990.2023-0012

• Reviews and Special Topics •     Next Articles

Research and industrialization progress on coating and doping modification of lithium-rich manganese-based materials

CHEN Tiandong(), ZHAO Guangzhao, HAI Chunxi, DONG Shengde, HE Xin, XU Qi, FENG Hang, YUAN Shaoxiong, MA Luxiang(), ZHOU Yuan()   

  1. College of Materials and Chemistry & Chemical Engineering,ChengDu Universityof Technology,Chendu 610059,China
  • Received:2023-01-06 Online:2023-09-10 Published:2023-09-19
  • Contact: MA Luxiang, ZHOU Yuan E-mail:ctd15729600435@163.com;maluxiang@cdut.edu.cn;yzhou712@sina.com

Abstract:

With the prices of Li2CO3,nickel and cobalt rising,layered lithium-rich manganese-based materials have attracted the attention of the new energy industry with multiple advantages such as high specific capacity(≥250 mA·h/g),high voltage,low cost and high safety.Nevertheless,the material has a series of problems such as irreversible oxygen redox,transition metal migration and structural transformation,resulting in serious voltage and capacity decay and low initial coulombic efficiency.Therefore,there are few enterprises that can stably produce lithium-rich manganese based power batteries,which hinders its commercialization process.Doping and coating are common and effective strategies to improve the electrochemical performance of lithium-rich manganese-based materials.The current industrial development of lithium-rich manganese-based materials was analyzed while the modification strategies and modification mechanisms of lithium-rich manganese-based materials were described,and the future development direction of lithium-rich manganese-based materials was proposed,which mainly included the following points:1)comprehensively exploring the failure mechanism of lithium-rich manganese-based materials;2)exploring the failure mechanism of lithium-rich manganese-based materials with the help of advanced equipment;3)development and application of new materials and technologies.

Key words: lithium-rich manganese-based materials, coating, doping, industrialization, electrochemical performance

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