材料科学
电解质
阳极
法拉第效率
化学工程
锂(药物)
阴极
金属
电池(电)
金属锂
枝晶(数学)
电极
冶金
化学
物理化学
医学
功率(物理)
物理
量子力学
工程类
内分泌学
几何学
数学
作者
Fulu Chu,Shiyuan Liu,Zengqiang Guan,Rongyu Deng,Lin Mei,Feixiang Wu
标识
DOI:10.1002/adma.202305470
摘要
Abstract Li metal anodes are extensively studied owing to their unparalleled advantages in achieving high energy density. However, safety issues originating from dendritic Li growth are always a huge hindrance for applications in Li metal batteries (LMBs). In this study, a functional additive, 4,6‐dimethyl‐2‐mercaptopyrimidine (DMP), which is a typical leveler in the copper electroplating industry, is selected to suppress Li dendrite formation. Various Li‐metal‐based batteries are systematically investigated and they show stable performances, such as excellent cycling stability above 800 h at 3 mA cm −2 in Li||Li cells and 400 cycles with high coulombic efficiencies (CEs >98%) at 1 mA cm −2 in Li||Cu cells. Furthermore, a comprehensive verification of the protective mechanism induced by the DMP leveling agent shows that the leveler updated the Li + solvation structure and occupied the inner Helmholtz plane of the Li anode. The planar DMP molecular layer absorbed on the surface of the Li metal can suppress side reactions and modify the Li deposition behavior via steric hindrance, inducing homogeneous Li deposition. Interestingly, the DMP leveler does not participate in the formation of the solid electrolyte interphase. This study can stimulate further ideas on non‐depleting but effective levelers as electrolyte additives for high‐performance LMBs.
科研通智能强力驱动
Strongly Powered by AbleSci AI