Long-Lasting Nb2O5-Based Nanocomposite Materials for Li-Ion Storage

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• 作者：Min Yeong Song ; Na Rae Kim ; Hyeon Ji Yoon ; Se Youn Cho ; Hyoung-Joon Jin ; Young Soo Yun
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：January 25, 2017
• 年：2017
• 卷：9
• 期：3
• 页码：2267-2274
• 全文大小：681K
• ISSN：1944-8252

文摘

Advanced nanostructured hybrid materials can help us overcome the electrochemical performance limitations of current energy storage devices. In this study, three-dimensional porous carbon nanowebs (3D-CNWs) with numerous included orthorhombic Nb₂O₅ (T-Nb₂O₅) nanoparticles were fabricated using a microbe-derived nanostructure. The 3D-CNW/T-Nb₂O₅ nanocomposites showed an exceptionally stable long-term cycling performance over 70 000 cycles, a high reversible capacity of ∼125 mA h g^–1, and fast Li-ion storage kinetics in a coin-type two-electrode system using Li metal. In addition, energy storage devices based on the above nanocomposites achieved a high specific energy of ∼80 W h kg^–1 together with a high specific power of ∼5300 W kg^–1 and outstanding cycling performance with ∼80% capacitance retention after 35 000 cycles.