Holey graphene interpenetrating networks for boosting high-capacitive Co3O4 electrodes via an electrophoretic deposition process
Holey graphene interpenetrating networks for boosting high-capacitive Co3O4 electrodes via an electrophoretic deposition process
复制标题
通过电泳沉积工艺增强高电容 Co3O4 电极的多孔石墨烯互穿网络
DOI：
10.1016/j.ceramint.2021.06.143
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发表时间：
2021
影响因子：
5.2
通讯作者：
Chen Xuyuan
中科院分区：
文献类型：
--
作者：
Yun Micun;Ma Yifei;Cai Zhuo;Ji Haomin;Han Jiemin;Wang Mei;Tong Zhaomin;Xiao Liantuan;Jia Suotang;Chen Xuyuan
采用水热法制备了Co3O4/多孔石墨烯复合材料(Co3O4/HG)，并用电泳法将其加工成电极。孔洞石墨烯(HG)包裹Co3O4形成三维骨架网络，从而提供高电导率，HG中的空穴可以进一步缩短电解液离子的扩散路径。因此，通过调整Co3O4与HG的质量比，Co3O4/HG复合材料的比容量提高到2714F/−1(电流密度为1A/−1)，是纯Co3O4的20倍。为了进一步探索Co3O4/HG的实际应用，制备了Co3O4/HG对称超级电容器。该超级电容器在1.2V的电压下工作稳定，能量密度提高到165Wh kg−1，在1A g−1时的高功率密度达到0.6kW/kg−1。
A composite of Co3O4/holey graphene (Co3O4/HG) was prepared via a facile hydrothermal route, and was then processed into an electrode by an electrophoretic deposition process. Holey graphene (HG) wrapped Co3O4to form a 3D skeleton network, thereby providing high electrical conductivity, and the holes in HG could further shorten the electrolyte ion diffusion pathway. Therefore, by adjusting the mass ratio of Co3O4to HG, the Co3O4/HG composite afforded an enhanced capacitance of 2714 F g−1(at a current density of 1 A g−1), which is 20 times higher than that of pure Co3O4. To further explore the practical applications of Co3O4/HG, a symmetric supercapacitor employing Co3O4/HG was fabricated. The supercapacitor functioned stably at potentials up to 1.2 V, with an enhanced energy density of 165 Wh kg−1and a high power density of 0.6 kW kg−1at 1 A g−1.