材料科学
超级电容器
导电体
电极
氢氧化物
集电器
纳米技术
纳米线
复合材料
化学工程
电化学
电解质
工程类
物理化学
化学
作者
S. Chandra Sekhar,G. Nagaraju
出处
期刊:Nano Energy
[Elsevier]
日期:2017-06-01
卷期号:36: 58-67
被引量:273
标识
DOI:10.1016/j.nanoen.2017.04.019
摘要
Silver nanowires (Ag NWs) have attracted particular interest in the development of various electronic and energy storage devices due to their one-dimensional structure, good conductivity, fast charge transportation and direct contact to the current collector. Herein, we have successfully deposited the binder-free nickel-cobalt layered double hydroxide nanosheets on Ag NWs-fenced carbon cloth (NC LDH [email protected]@CC) by a facile electrochemical deposition method with a chronoamperometry voltage of −1.0 V for 120 s. The electrically conductive and superhydrophilic nature of the hybrid nanocomposite electrode led to relatively high areal capacitance (1133.3 mF cm−2 at 1 mA cm−2) and good cycling stability (80.47% after 2000 cycles) compared to the electrode prepared without Ag NWs. Using such hierarchical NC LDH [email protected]@CC as a positive electrode, we further fabricated a flexible asymmetric supercapacitor (ASC) with activated carbon coated CC as a negative electrode. The as-assembled ASC exhibited maximum operational potential window of 1.6 V, high areal capacitance of 230.2 mF cm−2 and excellent cycling stability of 88.1% with remarkable energy densities at all the charge-discharge conditions (78.8 μWh cm−2 at the power density of 785 μW cm−2 and 40 μWh cm−2 at the high power density of 12.1 mW cm−2, respectively)
科研通智能强力驱动
Strongly Powered by AbleSci AI