Operando analysis of electronic band structure in an all-solid-state thin-film battery.

Commun Chem

Research Center for All-Solid-State Battery, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.

Published: April 2022

Material characterization that informs research and development of batteries is generally based on well-established ex situ and in situ experimental methods that do not consider the band structure. This is because experimental extraction of structural information for liquid-electrolyte batteries is extremely challenging. However, this hole in the available experimental data negatively affects the development of new battery systems. Herein, we determined the entire band structure of a model thin-film solid-state battery with respect to an absolute potential using operando hard X-ray photoelectron spectroscopy by treating the battery as a semiconductor device. We confirmed drastic changes in the band structure during charging, such as interfacial band bending, and determined the electrolyte potential window and overpotential location at high voltage. This enabled us to identify possible interfacial side reactions, for example, the formation of the decomposition layer and the space charge layer. Notably, this information can only be obtained by evaluating the battery band structure during operation. The obtained insights deepen our understanding of battery reactions and provide a novel protocol for battery design.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9814885PMC
http://dx.doi.org/10.1038/s42004-022-00664-wDOI Listing

Publication Analysis

Top Keywords

band structure
20
battery
7
band
6
structure
5
operando analysis
4
analysis electronic
4
electronic band
4
structure all-solid-state
4
all-solid-state thin-film
4
thin-film battery
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!