Key Laboratory of Artificial Structure and Quantum Control, Ministry of Education, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
Nanotechnology. 2017 Mar 10;28(10):105604. doi: 10.1088/1361-6528/aa583b. Epub 2017 Jan 10.
High-performance supercapacitors are very desirable for many portable electronic devices, electric vehicles and high-power electronic devices. Herein, a facile and binder-free synthesis method, galvanic displacement of the precursor followed by heat treatment, is used to fabricate ultrathin CoO nanosheet arrays on nickel foam substrate. When used as a supercapacitor electrode the prepared CoO on nickel foam exhibits a maximum specific capacitance of 1095 F g at a current density of 1 A g and good cycling stability of 71% retention after 2000 cycling tests. This excellent electrochemical performance can be ascribed to the high specific surface area of each CoO nanosheet that comprises numerous nanoparticles.
用于许多便携式电子设备、电动汽车和高功率电子设备的高性能超级电容器是非常理想的。在此，采用了一种简便且无粘结剂的合成方法，即前驱体的电置换随后进行热处理，在泡沫镍基底上制备了超薄 CoO 纳米片阵列。将制备的 CoO 泡沫镍用作超级电容器电极时，在 1 A g 的电流密度下具有 1095 F g 的最大比电容，经过 2000 次循环测试后，保留率为 71%，具有良好的循环稳定性。这种优异的电化学性能可归因于组成众多纳米颗粒的每个 CoO 纳米片的高比表面积。
