Research progress of alloy materials' application in lithium metal anode

Abstract

Lithiumis are considered as an ideal anode material for the next generation high energy density secondary batteries owing to its extremely low reduction potential and high specific capacity. However, its commercial application in lithium metal batteries is hindered by the problems of lithium dendritic growth, volume expansion effect and interface instability. To solve this problems, effective strategies including alloy anode, interface protection, structured anode design and solid electrolyte have been developed. Alloy materials play an important role in above strategies with its superior specific capacity, high Li+ conductivity and good lithium affinity. The electrochemical properties of alloy were reviewed and the recent research development of alloy materials' application in lithium metal anode was futher discussed. Last, the main existing problems of alloy materials' application in lithium metal anode were summarized and it was pointed out that the basic theoretical research should be strengthened.

Keywords

• alloy anode
• interface protection
• structured anode design
• solid electrolyte
• lithium metal anode