Enhanced high-temperature cycle life of LiFePO4-based Li-ion batteries by vinylene carbonate as electrolyte additive
Journal
Electrochemical and Solid-State Letters
Journal Volume
9
Journal Issue
12
Pages
537-541
Date Issued
2006
Author(s)
Abstract
Addition of vinylene carbonate (VC) in electrolyte solution has been found to greatly improve the high-temperature cycling performance of -based Li-ion batteries. It has been established that the VC additive remarkably suppresses Fe dissolution from cathode and hence, subsequent Fe deposition on the anode side. Furthermore, the VC additive also significantly reduces formation of solid-electrolyte interface layers on both cathodes and mesocarbon microbead (MCMB) anodes. With VC addition, a 18650-type /MCMB cell has been shown to retain capacity after 980 cycles at under charge–discharge rates. This is in contrast with more than 25% capacity loss after merely 100 cycles when no VC is added.
SDGs
Type
journal article