Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (3): 795-817.doi: 10.19799/j.cnki.2095-4239.2021.0712

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Progresses in visualization and quantitative analysis of the electrode process in rechargeable batteries

Siqi LYU1(), Na LI1, Haosen CHEN1, Shuqiang JIAO1,2, Weili SONG1()   

  1. 1.Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
    2.State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2021-12-28 Revised:2022-01-18 Online:2022-03-05 Published:2022-03-11
  • Contact: Weili SONG E-mail:siqi_Lv@163.com;weilis@bit.edu.cn

Abstract:

In China, the goals of "peak carbon dioxide emissions" and "carbon neutrality" were proposed in December 2020. As a result, industrial and energy structures must be optimized and improved battery technology, developed. The electrode could represent the working mechanism and the corresponding evolution of electrochemical systems during battery operation. The inhomogeneity of the electrode process in a single battery becomes increasingly obvious as the energy density and size of batteries rise. However, in terms of space and time, the challenges apply to multi-scale, multi-level, multi-process, multi-step, and multi-field coupling issues in electrochemical batteries. In this review, we will focus on the electrode process of batteries with different active ions as well as related processes such as liquid mass transfer, surface charge electron transfer, and solid phase diffusion. The influences of voltage, overpotential, diffusion coefficient, and geometric parameters on battery design have been analyzed in typical examples of high energy-density batteries, high-power-density batteries, and long-life cycle batteries. Furthermore, the impact of the electrode process inhomogeneity mechanism on battery performance has been discussed. We examine the electrode processes of lithium-ion batteries and Al batteries using various types of in-situ characterization technologies from different manufacturers based on visualization and quantitative analysis. The findings may be used to better understand the electrode process, which can help with material design and structure optimization. The existing scientific and technical challenges are also analyzed by establishing the relationship between the electrode process and battery performance. Existing scientific and technical issues are also analyzed, promising a platform for rational design and manufacture of high-performance batteries.

Key words: secondary battery, kinetic process, multiscale, in situ characterization technique

CLC Number: