Yu Xianbo, Sun Jie, Zhao Wenna, Zhao Shihang, Chen Hongmei, Tao Kai, Hu Yaoping, Han Lei
State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University Ningbo 315211 China
Key Laboratory for Molecular Design and Nutrition Engineering of Ningbo, Ningbo Institute of Technology, Zhejiang University Ningbo Zhejiang 315100 China
RSC Adv. 2020 Apr 6;10(24):14107-14112. doi: 10.1039/d0ra01470b.
Bismuth oxide (BiO) with high specific capacity has emerged as a promising negative electrode material for supercapacitors (SCs). Herein, we propose a facile metal-organic framework (MOF) derived strategy to prepare BiO microrods with a carbon coat (BiO@C). They exhibit ultrahigh specific capacity (1378 C g at 0.5 A g) and excellent cycling stability (93% retention at 4000 cycles) when acting as negative electrode material for advanced asymmetric SCs. The assembled BiO@C//CoNi-LDH asymmetric supercapacitor device exhibits a high energy density of 49 W h kg at a power density of 807 W kg. The current Bi-MOF-derived strategy would provide valuable insights to prepare Bi-based inorganic nanomaterials for high-performance energy storage technologies and beyond.
具有高比容量的氧化铋（BiO）已成为一种很有前景的超级电容器（SCs）负极材料。在此，我们提出一种简便的金属有机框架（MOF）衍生策略来制备具有碳涂层的BiO微棒（BiO@C）。当用作先进非对称SCs的负极材料时，它们表现出超高的比容量（在0.5 A g下为1378 C g）和出色的循环稳定性（在4000次循环后保留93%）。组装的BiO@C//CoNi-LDH非对称超级电容器装置在功率密度为807 W kg时表现出49 W h kg的高能量密度。当前这种源自Bi-MOF的策略将为制备用于高性能储能技术及其他领域的铋基无机纳米材料提供有价值的见解。
