包覆与掺杂对富锂锰基材料的改性研究及产业化进展

doi:10.19964/j.issn.1006-4990.2023-0012

摘要/Abstract

摘要：

随着碳酸锂价格一路飙升及镍、钴价格的高居不下，层状富锂锰基材料以高比容量（≥250 mA·h/g）、高电压、低成本、高安全等多重优势引起新能源行业的关注。然而该材料存在不可逆的氧化还原、过渡金属迁移及结构转变等一系列问题，导致电压和容量衰减严重、首次库伦效率低等问题，因此能稳定、量产富锂锰基动力电池的企业较少，阻碍了其商业化进程。掺杂、包覆是提高富锂锰基材料电化学性能的常见有效策略，通过阐述富锂锰基材料的改性策略以及改性机理的同时分析富锂锰基材料的产业发展现状，提出了富锂锰基材料未来的发展方向主要包括：1）全面探究富锂锰基材料的失效机制；2）借助先进设备探究富锂锰基材料的失效机制；3）新材料、新技术的开发与应用。

关键词: 富锂锰基材料, 包覆, 掺杂, 产业化, 电化学性能

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

中图分类号:

TQ137.12

陈天东, 赵光钊, 海春喜, 董生德, 贺欣, 许琪, 冯航, 袁少雄, 马路祥, 周园. 包覆与掺杂对富锂锰基材料的改性研究及产业化进展[J]. 无机盐工业, 2023, 55(9): 1-8.

CHEN Tiandong, ZHAO Guangzhao, HAI Chunxi, DONG Shengde, HE Xin, XU Qi, FENG Hang, YUAN Shaoxiong, MA Luxiang, ZHOU Yuan. Research and industrialization progress on coating and doping modification of lithium-rich manganese-based materials[J]. Inorganic Chemicals Industry, 2023, 55(9): 1-8.

图/表 5

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