A method for measuring the microscopic stress distribution of metal solid-state batteries

Abstract

The invention discloses a method for measuring the microscopic stress distribution of a metal solid-state battery, which solves the lack of efficient and reliable methods for measuring the stress distribution of the battery, and provides a powerful tool for breaking through the technical bottleneck of the development of all-solid-state batteries. The main points of the technical scheme are as follows: : Prepare a solid-state battery with lithium metal attached to the surface of the solid-state electrolyte and cycle the battery; place the sample on the adjustment table of the Raman spectrometer and adjust the sample surface to the focal plane; Carry out two-dimensional scanning; according to the scanning results, derive the spectral data collected by scanning; process the spectral data to obtain the corresponding stress value and physical coordinates, and obtain the surface microscopic stress distribution state diagram after visual processing. The method for microscopic stress distribution of solid-state batteries can obtain the microscopic stress distribution state of solid-state electrolytes, and is efficient, simple and reliable.

Description

technical field [0001] The invention relates to a technology for stress distribution of solid-state batteries, in particular to a method for measuring the microscopic stress distribution of metal solid-state batteries. Background technique [0002] The 2019 Nobel Prize in Chemistry awarded three meritorious contributions to the creation of lithium-ion battery technology is the best affirmation of the achievements of lithium-ion batteries in the past. However, the era of intelligent electrification has put forward higher requirements for lithium-ion battery technology. Lithium-ion battery is the basic unit for storing energy, and its core part is composed of positive and negative electrodes and electrolyte. In practical applications, energy density and safety are its two most important properties. However, traditional liquid lithium-ion batteries have great safety hazards due to the use of flammable liquid electrolytes. On the contrary, solid-state electrolytes have stable...

AI Technical Summary

Problems solved by technology

This problem of short battery cycle life due to the growth of lithium dendrites directly hinders the large-scale application of all-solid-state batteries. Therefore, it is extremely important to fully understand the growth mechanism of lithium dendrites in solid-state electrolytes to solve the problem.

Among the several important factors known to affect the microstructure of lithium dendrites, the microscopic current density, microscopic temperature, and electronic conductivity of the solid electrolyte have relatively complete and reasonable scientific methods that can be directly measured, but for the solid electrolyte Stress distribution measurement still lacks efficient and reliable methods, hindering the development of all-solid-state batteries

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