Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (3): 818-833.doi: 10.19799/j.cnki.2095-4239.2021.0713

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Magnetometry technique in energy storage science

Zhiqiang ZHAO1,2(), Hengjun LIU1,2, Xixiang XU1,2, Yuanyuan PAN1,2, Qinghao LI1, Hongsen LI1, Han HU3, Qiang LI1,2()   

  1. 1.College of Physics, Qingdao University, Qingdao 266071, Shandong, China
    2.Weihai Innovation Research Institute, Qingdao University, Weihai 264299, Shandong, China
    3.College of Chemical Engineering, China University of Petroleum(East China), Qingdao 266580, Shandong, China
  • Received:2021-12-28 Revised:2022-01-14 Online:2022-03-05 Published:2022-03-11
  • Contact: Qiang LI E-mail:2021020313@qdu.edu.cn;liqiang@qdu.edu.cn

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

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