Facile synthesis of Co₃V₂O₈ nanoparticle arrays on Ni foam as binder-free electrode with improved lithium storage properties

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• 作者：Yang Li^a ; Ling-Bin Kong^a ; ^b ; ^{konglb@lut.cn" class="auth_mail" title="E-mail the corresponding author} ; Mao-Cheng Liu^a ; ^b ; Wei-Bin Zhang^a ; Long Kang^a ; ^b
• 关键词：Transition metal oxides ; Composite ; Electrode ; Lithium storage
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1166-1173
• 全文大小：1696 K

文摘

The Co₃V₂O₈ nanoparticle arrays on Ni foam were synthesized by a simple one-step procedure using a low-temperature hydrothermal method. This architecture consisted of ultrafine Co₃V₂O₈ nanoparticles with a mean size of 30–60 nm, which covered homogeneously onto the porous Ni foam, forming a uniform film-like morphology. The Co₃V₂O₈ nanoparticles not only provided sufficient electro-active interactions for Li-storages reaction, but also had good mechanical contact with the Ni foam, hence improving reaction kinetics and enhancing electrode integrity. When used as a new sort of binder-free anode for Li-ion batteries (LIBs), this unique electrode delivered high initial discharge capacity of 1586.9 mA h g⁻¹ at 200 mA g⁻¹ and retained at 1289 mA h g⁻¹ after 100 cycles, and the discharge capacity maintained at 1004.4 mA h g⁻¹ after 800 cycles at 500 mA g⁻¹. Even when the current was 10 A g⁻¹, discharge capacity of 471.4 mA h g⁻¹ could be achieved. In addition, the charge/discharge mechanism of Co₃V₂O₈ based on conversion and intercalation reaction routes were verified by ex-situ XRD diffraction. Therefore, the Co₃V₂O₈ nanoparticle arrays on Ni foam might open a new insight for transition metal oxides as electrode materials for LIBs.