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Impact of Surface Structure on SEI for Carbon Materials in Alkali Ion Batteries: A Review by Xvtong Zhao; Ying Chen; Hao Sun; Tao Yuan; Yinyan Gong; Xinjuan Liu; Taiqiang Chen is a Engineering article available to read on EtoBox.

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Due to their low cost, suitable working potential and high stability, carbon materials have become an irreplaceable anode material for alkali ion batteries, such as lithium ion batteries, sodium ion batteries and potassium ion batteries. During the initial charge, electrolyte is reduced to form a solid electrolyte interphase (SEI) on the carbon anode surface, which is an electron insulator but a good ion conductor. Thus, a stable surface passivation is obtained, preventing the decomposition of electrolyte in the following cycles. It has been widely accepted that SEI is essential for the long-term performance of batteries, such as calendar life and cycle life. Additionally, the initial coulombic efficiency, rate capability as well as safety of the batteries are dramatically influenced by the SEI. Extensive research efforts have been made to develop advanced SEI on carbon materials via optimization of electrolytes, including solutes, solvents and additives, etc. However, SEI is produced via the catalytic decomposition of electrolyte by the surface of electrode materials. The surface structure of the carbon material is another important aspect that determines the structure and propert

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Author

Xvtong Zhao; Ying Chen; Hao Sun; Tao Yuan; Yinyan Gong; Xinjuan Liu; Taiqiang Chen

Publisher

MDPI AG

Published

2023

Language

EN

Field

Engineering (Physical Sciences)