Investigation of Physical and Electrochemical Properties of β-TaxNb1–xPO5 as an Electrode Material for Lithium Batteries

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• 作者：Matthew Y. Lu ; Fadwa Badway ; Joshua R. Kim ; Glenn G. Amatucci
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：May 10, 2016
• 年：2016
• 卷：28
• 期：9
• 页码：2949-2961
• 全文大小：947K
• 年卷期：0
• ISSN：1520-5002

文摘

The effect of intrinsic phase transitions and substitutions on the structural and electrochemical properties of monoclinic β-NbPO₅ as an electrode material for lithium or lithium-ion batteries is explored for the first time. Isolation of lower voltage phase transitions of the pure β-NbPO₅ was found to be highly effective in improving the long-term cycling stability of the material. An analogous impact to cycling stability was identified through the use of effective solid solutions based on cations such as Ta⁵⁺. Resulting materials exhibited excellent cycling stability, exceptionally low first cycle irreversible loss, and excellent 20C rate capability without the need for carbonaceous nanocomposites.