Investigation of Reversible Li Insertion into LiY(WO4)2

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• 作者：Asha Gupta ; Preetam Singh ; C. Buddie Mullins ; J. B. Goodenough
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：July 12, 2016
• 年：2016
• 卷：28
• 期：13
• 页码：4641-4645
• 全文大小：395K
• 年卷期：0
• ISSN：1520-5002

文摘

The layered structure of LiY(WO₄)₂ accommodates a reversible insertion of two Li per formula unit near 1.5 V versus Li⁺/Li⁰. At low charge/discharge rates, there is a voltage step on charge from 1.55 to 1.6 V at one Li extraction per formula unit, the efficiency of electrical energy storage is reasonable, and the specific capacity is 90 m Ah g^–1. At higher rates, less than one Li per formula unit is inserted reversibly. A solid-electrolyte interphase (SEI) is formed in the voltage range 1.2 < V < 1.4 V versus Li⁺/Li⁰ on the initial charge.