Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1294262 | Journal of Power Sources | 2009 | 4 Pages |
Abstract
A new fire-retardant—dimethyl(2-methoxyethoxy)methylphosphonate (DMMEMP) has been synthesized and evaluated as a high safe electrolyte solvent for lithium-ion batteries. This report summarizes the physical and electrochemical properties of the new compound. It is found that, this nonflammable phosphonate has a moderate viscosity, a high dielectric constant and a good thermal stability. It can provide a wide electrochemical stability window of 0–5.5 V (vs. Li+/Li), a high conductivity of 2.0 mS cm−1 at 20 °C with 1 M LiTFSI. The electrochemical performance investigated with the Li/LiFePO4 half-cells shows a good capacity of 148.1 mAh g−1 and a coulombic efficiency close to 100% at the 10th cycle.
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Authors
Lei Wu, Zhiping Song, Lishan Liu, Xiangfeng Guo, Lingbo Kong, Hui Zhan, Yunhong Zhou, Zaoying Li,