Facile preparation of WO3 nano-fibers with super large aspect ratio for high performance supercapacitor
Facile preparation of WO3 nano-fibers with super large aspect ratio for high performance supercapacitor
复制标题
轻松制备用于高性能超级电容器的超大长径比WO3纳米纤维
DOI：
10.1016/j.jallcom.2018.09.085
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发表时间：
2019
影响因子：
6.2
通讯作者：
Liu Jingbo Louise
中科院分区：
文献类型：
--
作者：
Zheng Feng;Xi Cuiping;Xu Jiahe;Yu Yi;Yang Weiguang;Hu Pengfei;Li Yang;Zhen Qiang;Bashir Sajid;Liu Jingbo Louise
采用简单的水热法在铜导电集流器上合成了具有超大宽高比的wo3纳米纤维。制备的wo3纳米纤维由于其直接生长、高比表面积和一维（1D）管道结构，可以容纳大量的电解质离子，并为电子和电解质离子的快速迁移提供了途径。wo3纳米纤维具有优异的循环可逆性（1.0 A g−1时98%），良好的循环稳定性（5000次循环后93%），高比电容（1.0 A g−1时436 F g−1）和低电荷转移电阻（29 Ω）。将wo3纳米纤维组装成对称超级电容后，该对称超级电容器件的有效工作范围为0 ~ 1.8 V，能量密度为99.0 W h kg−1，功率密度为450 W kg−1。制备的wo3纳米纤维具有良好的电化学性能，是高储能系统和极具发展前景的超级电容器电极材料。
WO3nano-fibers with super large aspect ratio are synthesized on a Cu conductive current collector by using a simple hydrothermal method. The as-prepared WO3nano-fibers can accommodate a large number of electrolyte ions and provide a rapid route for the migration of electrons and electrolyte ions due to its direct growth, high specific surface area, and one dimensional (1D) pipeline structure. The WO3nano-fibers exhibit excellent cyclic reversibility (98% at 1.0 A g−1), good cycling stability (93% after 5000 cycles), high specific capacitance (436 F g−1at 1.0 A g−1) and low charge transfer resistance (29 Ω). After the WO3nano-fibers are assembled into a symmetric supercapacitor, the symmetric supercapacitor device has a wide effective operating range of 0–1.8 V and high energy density of 99.0 W h kg−1at the power density of 450 W kg−1. The good electrochemical performances of as-prepared WO3nano-fibers make it an attractive candidate for high energy storage systems and promising supercapacitor electrode material.