Preparation of nano-networks of MnO2 shell/Ni current collector core for high-performance supercapacitor electrodes
Preparation of nano-networks of MnO2 shell/Ni current collector core for high-performance supercapacitor electrodes
复制标题
高性能超级电容器电极用MnO2壳/Ni集流体核纳米网络的制备
DOI：
10.1039/c1jm13894d
复制
发表时间：
2012-01-14
影响因子：
--
通讯作者：
He, Deyan
中科院分区：
文献类型：
--
作者：
Liu, Dequan;Wang, Qi;He, Deyan
采用静电纺丝技术制备了一种新型结构的镍集流体。一个可充电的MnO 2涂层电沉积到NCC上，并将所得的MnO 2壳/NCC核的纳米网络用作超级电容器电极。优异的电化学性能在高充电/放电速率下显示。循环伏安法测量表明，即使在200 mV s-1的扫描速率下，电流也是稳定的。在电流密度为20 A g-1时，通过恒电流测试获得214 F g-1的电容，这比MnO 2涂覆的Ni泡沫高得多。
A novel architecture of nickel current collector (NCC) is fabricated cost-effectively by electrospinning. An ultrathin MnO2 coating is electrodeposited on to the NCC and the resultant nano-networks of MnO2 shell/NCC core are used as supercapacitor electrodes. Excellent electrochemical performance is revealed at a high charge/discharge rate. The cyclic voltammetry measurements show that the current is stable even at a scan rate as fast as 200 mV s−1. A capacitance of 214 F g−1 is obtained by galvanostatic testing at a current density as large as 20 A g−1, which is much higher than that of MnO2 coated Ni foam.