锂电池百篇论文点评(2021.6.1-2021.7.31)

Reviews of selected 100 recent papers for lithium batteries(Jun.1,2021 to Jul.31,2021)

该文是一篇近两个月的锂电池文献评述,以“lithium”和“batter*”为关键词检索了Web of Science从2021年6月1日至2021年7月31日上线的锂电池研究论文,共有2739篇,选择其中100篇加以评论。正极材料方面主要研究了高镍三元、富锂正极以及尖晶石镍锰酸锂材料的包覆和掺杂改性。金属锂负极的研究包含金属锂的表面修饰、三维结构设计以及其沉积形态和均匀性。硅基复合负极材料的研究侧重于混合电极的结构设计,尤其是各类黏结剂的开发以缓解循环过程中Si的体积变化,维持电极完整性。固态电解质的研究主要是对现有固态电解质的进一步改性优化以及对新型固态电解质的探索,而其他电解液和添加剂的研究则主要包括不同电解质和溶剂对各类电池材料体系适配,以及对新的功能性添加剂的探索。固态电池方向更多地集中于界面问题的研究,锂硫电池则更多关注“穿梭”效应的改善。电池测试技术方面主要涉及金属锂沉积行为的三维表征以及快充条件下电极材料各性质的测量。理论计算工作涉及到界面处离子传输的研究,而界面反应部分涉及到SEI形成的分析。此外,集流体的改性以及电极预锂化研究工作也有多篇。

This bimonthly review paper highlights 100 recent published papers on lithium batteries.We searched the Web of Science and found 2739 papers online from Jun.1,2021 to Jul.31,2021.100 of them were selected to be highlighted.Layered oxide cathode including Ni-rich oxides,lithium-rich materials,and spinel materials are still under extensive investigations for the modification of doping and coating.Large efforts were devoted to design the three-dimensional electrode structure,surface modification,and plating inhomogeneity of lithium metal anode.For silicon-based anode materials,beside 3D structure design,the researches focused on the development of electrode binders,aiming at buffering the volume change during cycling.The researches of solid-state electrolytes mainly focused on optimizing pre-existing materials and developing new materials,whereas liquid electrolytes mainly focused on the optimal design of solvents and lithium salts for different battery systems and developing new additives.The works of solid-state battery involve mainly the modification of interfaces,and suppressing the"shuttle effect"is the main task for Li-S battery.3D lithium metal plating and electrode behavior under high current density were characterized by in-situ and ex-situ technologies.Theoretical calculation papers were related to ion transport and some interfacial reaction works were related to the SEI analysis.There are also a few papers related to the investigation of current collectors'modification and pre-lithiation techniques.