Zhang Xin, Liu Xubo, Zeng Sha, Fang Jianhui, Men Chuanling, Zhang Xiaohua, Li Qingwen
Department of Chemistry, College of Sciences, Shanghai University, Shanghai, 200444, China.
Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Nanoscale Res Lett. 2017 Dec;12(1):165. doi: 10.1186/s11671-017-1953-8. Epub 2017 Mar 4.
A novel two-dimensional (2D) nanomaterial, namely sulfonated graphenal polymer (SGP), is used to tune the hydrothermal growth of CoO nanoparticles. SGP provides abundant nucleation sites to grow CoO nanoparticles and effectively reduces the particle size and dimension. As a result, with considering the improved size uniformity of CoO and the tight wrapping of SGP around CoO as well, the CoO/SGP hybrid electrode exhibits a high specific electrochemical capacitance of 234.28 F/g at a current density of 0.2 A/g, 237% higher than that of the pure CoO electrode. By using the hybrid as the anode of an all-solid-state asymmetric supercapacitor, the capacitance can be well maintained up to 93% after 5000 cycles even at 2 A/g.
一种新型二维（2D）纳米材料，即磺化石墨烯聚合物（SGP），被用于调控CoO纳米颗粒的水热生长。SGP提供了丰富的成核位点以生长CoO纳米颗粒，并有效减小了颗粒尺寸和维度。因此，考虑到CoO尺寸均匀性的提高以及SGP对CoO的紧密包裹，CoO/SGP复合电极在0.2 A/g的电流密度下表现出234.28 F/g的高比电化学电容，比纯CoO电极高237%。通过使用该复合材料作为全固态不对称超级电容器的阳极，即使在2 A/g的电流密度下经过5000次循环后，电容仍能良好地保持在93%。
