Review—The Lithiation/Delithiation Behavior of Si-Based Electrodes: A Connection between Electrochemistry and Mechanics. Issue 1 (14th January 2021)

• Record Type: Journal Article
• Authors: Kim, Minkyu; Yang, Zhenzhen; Bloom, Ira
• Is Part Of: Journal of the Electrochemical Society. Volume 168:Issue 1(2021)
• Publication Date: 2021-01-14
• Subjects: - Electrochemistry of Si-based anodes -- - Mechanics of Si-based anodes -- - Connection between electrochemistry and mechanics of Si-based anodes; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/abd56f
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Silicon is a promising alternative anode material to graphite because of its high gravimetric and volumetric energy densities. However, severe capacity fading is observed in Si electrodes, and it is a result of mechanical changes of Si, such as volume changes, stress or fracture. Furthermore, these mechanical behaviors are strongly coupled with the electrochemistry of the Li–Si alloying reaction in Si-based electrodes, including both thermodynamics and kinetics. Therefore, the electrochemical properties of Si-based electrodes are strongly dependent on the control of the mechanics of Si during lithiation/delithiation. Thus, it is very important to understand the correlation between electrochemistry and mechanics. Here, we review lithiation/delithiation behaviors of various types of Si-based electrodes, applying a fundamental understanding of electrochemistry and mechanics and the correlation between them.