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富锂正极材料被认为是高比能锂离子电池的潜在正极材料之一,其能够提供约300m A?h/g的可逆容量,相比于目前商业化正极材料具有明显优势。然而初始Coulombic效率低、电压衰减、容量衰减等阻碍了其实际应用。本综述针对2类富锂材料包括富锂锰基材料和富锂阳离子无序材料,详细介绍其晶体结构、阳离子氧化还原机制、阴离子氧化还原机制,重点讨论其存在的问题及来源,系统总结其材料改性策略,为富锂正极材料的研究提供理论指导和技术支持。
Abstract：Lithium-rich cathode materials are regarded as one of the most promising candidates for high energy lithium-ion batteries delivering reversible capacity of 300 mA?h/g, which are better than the commercial cathode materials. However, some drawbacks of lithium-rich cathode materials(i.e., low initial Coulombic efficiency, voltage decay and capacity decay) affect the practical application. In this review, we represented recent studies on two types lithium-rich cathode materials, i.e. lithium-rich Mn-based cathode materials and lithium-rich cation disordered cathode materials, introduced the crystal structure, cation redox and anion redox mechanisms of these lithium-rich cathode materials in detail, discussed the drawbacks of the materials and some sources of these drawbacks, and summarized the performance improvement, thus providing the theoretical guidance and technical support for future research of lithium-rich cathode materials.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20210645
中图分类号:TM912;TQ131.11
引用信息:
[1]刘日鑫,张振杰,李浩宇,等.高比能锂离子电池富锂正极材料研究进展[J].硅酸盐学报,2022,50(01):70-83.DOI:10.14062/j.issn.0454-5648.20210645.
基金信息:
深圳市优秀科技创新人才培养项目(RCYX20200714114524165); 国家自然科学基金面上项目(22075132)
2021-08-04
2021
2021-12-09
2021
1
2022-01-05
2022-01-05
2022-01-05