Journal
ACS APPLIED ENERGY MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c02130
Keywords
lithium-ion battery; Langmuir-Blodgett technique; silicon electrode; solid electrolyte interphase; electrolyte reactions
Funding
- Assistant Secretary for Energy Efficiency, Vehicle Technologies Office of the U.S. Department of Energy, under the Si Consortium Program
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
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This study demonstrates the applicability of small-molecule Langmuir-Blodgett films in electrode interface engineering for the development of lithium-ion batteries. The thin molecular films generated through the Langmuir-Blodgett technique were found to effectively regulate the electrochemical behavior of silicon electrodes in different electrolyte solutions.
Silicon-based anodes are widely expected to vastly improve the perform-ance of lithium-ion batteries (LIBs). However, the silicon anode interface is well-known to be unstable and reactive, leading to various electrolyte side reactions that would ultimately lower the battery performance. Consequently, it is critically important to rationally design the silicon anode to stabilize its interface. The Langmuir-Blodgett (LB) technique is a well-established, versatile, and powerful method for fabricating ultrathin films over solid substrates. Here, we utilize LB approach to generate thin films composed of small organic molecules over silicon electrodes as protective layers. Such molecular layers were found capable of mediating the electrochemical behavior of silicon electrodes in both aqueous and organic carbonate electrolytes. This study illustrates the applicability of small-molecule LB films in electrode interface engineering for LIB technology development.
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