材料科学
超级电容器
氮化钒
纳米点
电容
钒
纳米技术
氮化物
石墨氮化碳
碳纤维
光电子学
化学工程
冶金
复合材料
催化作用
图层(电子)
电极
复合数
有机化学
化学
物理化学
工程类
光催化
作者
Qingwei Li,Yi Chen,Jiabao Zhang,Weifeng Tian,Lei Wang,Zhiguo Ren,Xiaochuan Ren,Xingxing Li,Biao Gao,Xiang Peng,Paul K. Chu,Kaifu Huo
出处
期刊:Nano Energy
[Elsevier]
日期:2018-09-01
卷期号:51: 128-136
被引量:75
标识
DOI:10.1016/j.nanoen.2018.06.053
摘要
Abstract High volumetric capacitance electrode materials are highly desirable for miniaturized and portable capacitive storage devices. Herein, a spatially confined strategy to prepare 0D-in-2D pillared lamellar hybrid comprising vanadium nitride nanodots intercalated carbon nanosheets (VNNDs/CNSs) is proposed for promising capacitive material with high volumetric capacitance. The VNNDs/CNSs shows an ultrahigh volumetric capacitance of 1203.6 F cm−3 at 1.1 A cm−3 and rate capability of 703.1 F cm−3 at 210 A cm−3 surpassing those of carbon, transition metal oxides/nitrides. Even the 150 μm-thick film electrode comprising VNNDs/CNSs has a volumetric capacitance of 867.1 F cm−3. Moreover, the VNNDs/CNSs electrode exhibits extraordinary cycling stability with 90% capacitance retention after 10,000 cycles. The all-solid-state symmetric flexible supercapacitor based on VNNDs/CNSs electrodes boasts a high volumetric energy density/power density of 30.9 Wh L−1/64,500 W L−1 with 91% capacitance retention after 10000 cycles, rendering promising applications in high-performance flexible supercapacitors. The strategy provides an insight into the rational design of compact, robust and highly conductive electrode materials with high volumetric capacitances and long life.
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