A nest-like hierarchical porous V₂O₅ as a high-performance cathode material for Li-ion batteries

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• 作者：Chongyao Xie^a ; Chuanjun Cheng^a ; ^b ; Jingang Yang^a ; ^c ; Junke Hou^a ; ^b ; Dingyu Liu^a ; ^b ; Sangui Liu^a ; ^b ; Jin Han^a ; ^b ; Yan Zhang^a ; ^b ; Maowen Xu^a ; ^b ; ^{xumaowen@swu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Vanadium pentoxide ; Hierarchical porous structure ; Lithium-ion batteries ; Specific capacity
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 November 2016
• 年：2016
• 卷：42
• 期：15
• 页码：16956-16960
• 全文大小：1613 K

文摘

In this article, V₂O₅ with a novel nest-like hierarchical porous structure has been synthesized by a facile solvothermal method and investigated as cathode material for lithium-ion batteries. The nest-like V₂O₅ with a diameter of about 1.5 µm, was composed of interconnected nanosheets with a highly porous structure. Without other modification, the as-prepared V₂O₅ electrode exhibited superior capacity. An initial discharge capacity of 330 mAh g⁻¹ (at a current density of 100 mA g⁻¹) could be delivered and a stable discharge capacity of 240 mAh g⁻¹ after 50 cycles is maintained. The excellent performance was attributed to the hierarchical porous structure that could buffer against the local volume change and shorten the lithium-ions diffusion distance.