Toward functional units constructing Mn-based oxide cathodes for rechargeable batteries

• 作者: Shiqi Liu Haijun Yu
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2021,（13）
• 所属期刊栏目: PERSPECTIVES
• 页码范围: 1260-1262
• 页数: 3页
• 语种: 英文

摘要

To satisfy the current global energy demand,the development and practical applications of designing and constructing high-energy cathodes for Li-ion batteries(LIBs)are necessitated[1].In particular,layered oxide cathode materials,especially lithium-manganese-based layered oxides(LMLOs),with excellent electro-chemical properties offer promising prospects.However,the introduction of a large content of Mn into the LMLO matrix remains a challenge[2].Functional units,which are intermediate structural units with specific functions introduced between the atomic/molecular and macroscopic scales,exhibiting specific architectures in rechargeable-battery materials can effectively boost electrochemical features.To date,numerous scientists have mobilized all the potential of the functional units and microstruc-ture architectures,and Mn has emerged as one of the most com-petitive components for energy storage systems.However,diverse obstacles are currently being encountered,involving the determination of obscure solutions to introduce functional units as well as insufficient techniques to distinguish them.Crystalline domain battery materials(CDBMs)with hierarchical structure adjustments are engineered by combining primary functional units at the short-range ordering scale,followed by the secondary inte-gration of these crystal domains under certain configurations into grains,and finally by optimizing the nanoengineered grains;CDBMs can stimulate new approaches for achieving optimized electrochemical performance,thereby highlighting great potentials and opportunities for the next generation of energy storage materials[3,4].