期刊
RARE METALS
卷 41, 期 5, 页码 1456-1476出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-021-01896-w
关键词
Li- and Mn-rich cathode material; Two-phase composite model; Phase transition; Spinel/layered hetero-structure
资金
- Natural Science Foundation of Fujian Province of China [2019J06003, 2020J05014]
- National Natural Science Foundation of China [51931006, 51871188]
- National Key R&D Program of China [2016YFA0202602]
- Guangdong Basic and Applied Basic Research Foundation [2021A1515010139, 2019A1515011070]
- Science and Technology Planning Projects of Fujian Province, China [2020H0005]
- Fundamental Research Funds for the Central Universities of China [20720200068, 20720190013]
- Double-First Class'' Foundation of Materials Intelligent Manufacturing Discipline of Xiamen University
In this article, the structure controversy and phase transition mechanisms of Li- and Mn-rich cathode materials are summarized. The causes of initiating or accelerating phase transition are summarized into three main driving forces, and the applications of phase transition behavior in improving the electrochemical performance are discussed.
Li- and Mn-rich (LMR) cathode materials have received tremendous attention due to the highly reversible specific capacity (> 250 mAh.g(-1)). In the analysis of its crystal structure, the two-phase composite model gains increasing acceptance, and the phase transition behaviors in LMR cathode materials have been extensively studied. Herein, the structure controversy of LMR cathode materials, and the mechanisms of phase transition are summarized. Particularly, the causes of initiating or accelerating the phase transition of LMR cathode materials have been summarized into three main driving forces, i.e., the electrochemical driving force, the component driving force and the thermodynamic driving force. Additionally, the applications of phase transition behavior in improving the electrochemical performance of LMR cathode materials, including the construction of spinel surface coating and spinel/layered hetero-structure are discussed.
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