Electrochemical Intercalation/De-Intercalation of Lithium Ions at Graphite Negative Electrode in TMP-Based Electrolyte Solution
Electrochemical Intercalation/De-Intercalation of Lithium Ions at Graphite Negative Electrode in TMP-Based Electrolyte Solution
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DOI：
10.1149/2.002301jes
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发表时间：
2012
影响因子：
3.9
通讯作者：
S. Takeuchi;S. Yano;T. Fukutsuka;K. Miyazaki;T. Abe
中科院分区：
文献类型：
--
作者：
S. Takeuchi;S. Yano;T. Fukutsuka;K. Miyazaki;T. Abe
提出了一种制备锂离子电池不可燃电解质的新方法。研究了钙盐的加入对石墨负极在含40 vol.%磷酸三甲酯（TMP）的碳酸乙烯基电解质中电化学行为的影响。当电解质中不含钙盐时，锂离子与TMP共插层后石墨发生脱落。相反，当电解质中加入一定量的钙盐时，可以观察到可逆的锂离子插/脱插行为。通过考虑钙离子和锂离子的刘易斯酸度以及溶剂的供体数，讨论了钙盐加入量与锂离子插层行为的关系。
A new approach for the non-flammable electrolytes of lithium-ion batteries is proposed. Effect of calcium salt addition on electrochemical behaviors of a graphite negative electrode in ethylene carbonate (EC)-based electrolyte containing 40 vol.% trimethyl phosphate (TMP) were studied. Co-intercalation of Li+ with TMP followed by exfoliation of graphite took place when the electrolyte does not contain calcium salt. On the contrary, reversible lithium-ion intercalation/de-intercalation behaviors were observed when the certain amount of calcium salt was added to the electrolyte. Correlation between calcium salt addition and lithium-ion intercalation behavior is discussed by considering the Lewis acidity of calcium-and lithium-ions and donor numbers of solvents.