Stationary Full Li-Ion Batteries with Interlayer-Expanded V₆O₁₃ Cathodes and Lithiated Graphite Anodes

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• 作者：Na Xu ; Xiaoxuan Ma ; Mengfan Wang ; Tao Qian ; ^{tqian@suda.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jiaqi Liang ; Wanli Yang ; Ying Wang ; Jun Hu ; ^{jhu@suda.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Chenglin Yan ; ^{c.yan@suda.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{chenglinyan.nano@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Full batteries ; Ultra-stable cathodes ; V6O13 ; Interlayer expanded ; Ultrathin nanosheets
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 June 2016
• 年：2016
• 卷：203
• 期：Complete
• 页码：171-177
• 全文大小：1983 K

文摘

Here we report a Li-metal-free full battery, using interlayer-expanded V₆O₁₃ ultra-thin nanosheets and prelithiated graphite for cathodes and anodes, respectively. This full Li-ion battery exhibits a superior specific capacity of 233 mAh g⁻¹ at a current density of 100 mA g⁻¹ and 91% capacity retention after 500 cycles. Our first-principle calculations reveal that the interlayer-expansion is induced by the interaction between V₆O₁₃ and water which breaks interlayer V-O bonds and forms hydroxyls. The unique structure provides short lithium-ion diffusion path, excellent charge transport, abundant binding sites and volume flexibility for Li⁺ intercalation/deintercalation, thus leading to high capability (280 mAh g⁻¹) and cycling performance (capacity retain 96.1% at 2.4 A g⁻¹ for 1000 cycles). Using novel prelithiation process, the Li-metal-free full cells with high controllability and performance is expected to contribute significantly to the development of safe, green, and powerful energy storage devices.