Magnetometry technique in energy storage science

doi:10.19799/j.cnki.2095-4239.2021.0713

Abstract

Abstract:

Understanding the structure-activity relationship of electrochemical energy storage system will greatly promote the discovery and regulation of new phenomena and new properties in electrode materials. However, no single technology can clarify all the problems of complex interface reactions in the electrochemical system. Only by observing from multiple perspectives can we see the buried interface and the evolution process under working conditions. Many energy storage materials are rich in transition metal elements, and their magnetic properties are closely related to lattice structure, electronic energy band and electrochemical performance. Therefore, magnetometry can reveal structural phase transition and local electron distribution changes of energy materials, analyze the mechanism of physical and chemical reactions, and guide material design. Focusing on magnetic characterization technology for energy storage, this paper firstly discusses the technical principle of magnetometry, and then summarizes the research progress of magnetometry in studying the structural characteristics of electrode materials and characterizing the reaction process, especially introduces the unique advantages of in-situ magnetometry in monitoring the magnetic changes in real time and illustrating the reaction mechanism. Comprehensive analysis shows that in-situ magnetometry technology can characterize the charge transfer in electrochemical reactions with high sensitivity and rapid response, which provides a new idea for revealing the electrochemical reactions at complex interfaces and has broad application prospects in energy storage science. This paper is helpful to understand the important value of magnetometry technique in the research of battery materials and further promote the development of magnetometry technique in the field of energy storage.

Key words: energy storage science, operando magnetometry, Li-ion battery, sodium-ion battery, magnetoelectrochemistry

CLC Number:

TM 911

Zhiqiang ZHAO, Hengjun LIU, Xixiang XU, Yuanyuan PAN, Qinghao LI, Hongsen LI, Han HU, Qiang LI. Magnetometry technique in energy storage science[J]. Energy Storage Science and Technology, 2022, 11(3): 818-833.

Figures/Tables 10

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