Conducting polythiophene-wrapped Li₄Ti₅O₁₂ spinel anode material for ultralong cycle-life Li-ion batteries

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• 作者：Dong Xu ; ^{dongxu_professor@yahoo.com} ; Peifeng Wang ; Rui Yang
• 关键词：Energy storage and conversion ; Li4Ti5O12 anode ; Polythiophene polymer ; Nanocomposites ; Electrical properties
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 April 2017
• 年：2017
• 卷：43
• 期：5
• 页码：4712-4715
• 全文大小：799 K
• 卷排序：43

文摘

In this work, we report a novel strategy to develop a high performance Li4Ti5O12 anode for use in Li-ion batteries. Conducting polythiophene was successfully coated on the surface of Li4Ti5O12 via an in-situ oxidative polymerization method to improve its electron conductivity. Benefiting from this designed core-shell structure, the polythiophene-wrapped Li4Ti5O12 anode (Li4Ti5O12/PTh) presents excellent rate performance with a reversible discharge capacity of 151.9 mAh g−1 at 10 C and remarkable ultralong cycle-life stability accompanied by a high capacity of 140.3 mAh g−1 at 10 C over 500 cycles. Results suggest the core-shell Li4Ti5O12/PTh composite to be a promising anode material for Li-ion batteries.