Analysis of interface characteristics and characterization techniques for lithium battery solid-state development
HAN Ce
SHEN Shaopeng
SUN Hongrui
Abstract：Solid-state batteries(SSBs),known for their excellent safety and high energy density,have emerged as a key development direction for next-generation traction battery technology.However,the solid-solid interfaces,which serve as critical pathways for ion transport within the battery,face significant challenges such as point contact,low ion transport efficiency,interface reactions,and poor mechanical stability.This article reviews the characteristics of solid-solid interfaces in SSBs and evaluates the application of advanced characterization techniques,including electrochemical analysis,disassembly analysis,non-destructive testing,and online sensing technologies.By analyzing the processes of interface degradation,the synergistic mechanism of contact cracking and by-product reaction cracking is revealed.In response to the requirements for the integration of SSBs into vehicles,the future development of interface engineering is explored.Strategies such as composite electrolyte design and the development of functional additives are proposed as interface modification approaches,offering insights into new directions for interface science research.
Keywords：solid-state batteriessolid-solid interfacestesting technology
Publication Date：2025-06-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 184-194 )