Electrochemical Supercapacitors from Diamond
Electrochemical Supercapacitors from Diamond
复制标题
DOI：
10.1021/acs.jpcc.5b04719
复制
发表时间：
2015-08
影响因子：
3.7
通讯作者：
Siyu Yu;N. Yang;Zhuang Hao;Jan Meyer;S. Mandal;O. Williams;Inga Lilge;H. Schönherr;Xin Jiang
中科院分区：
文献类型：
--
作者：
Siyu Yu;N. Yang;Zhuang Hao;Jan Meyer;S. Mandal;O. Williams;Inga Lilge;H. Schönherr;Xin Jiang
掺硼金刚石已被用作电极材料来构建双电层电容器（EDLC），并作为电极支撑来形成假电容器。在1.0 M的NaSO4溶液中，金刚石EDLC的电容在3.6 ~ 7.0 μF cm-2之间，与其他碳材料的EDLC相当。在100 mV s-1的扫描速率下，在1000次充放电过程中，电容仅下降5%，表明这种EDLC的稳定性高，寿命长。为了提高金刚石edlc的电容，在金刚石表面涂覆MnO2膜，构建假超级电容器。在0.2 M的MnSO4溶液中，以0.9 V vs Ag/AgCl恒定电位沉积MnO2薄膜。单位面积上沉积的MnO2的质量称为面积密度，由沉积电荷计算得出，并通过沉积时间来控制。采用SEM、XPS、拉曼光谱等技术对MnO2薄膜进行了表征。在1.0 M的NaSO4溶液中，电容…
Boron-doped diamond has been utilized as an electrode material to construct an electric double layer capacitor (EDLC) as well as an electrode support to form a pseudocapacitor. In 1.0 M NaSO4 solution, the capacitance of diamond EDLC is in the range of 3.6–7.0 μF cm–2, comparable with those of EDLCs based on other carbon materials. During a charge/discharge process for 1000 cycles at a scan rate of 100 mV s–1, the capacitance only decreases 5%, indicating high stability and a long lifetime of such an EDLC. To improve the capacitance of diamond EDLCs, diamond was coated with a MnO2 film to construct a pseudosupercapacitor. The MnO2 films were electrodeposited at a constant potential of 0.9 V vs Ag/AgCl in 0.2 M MnSO4 solution. The mass of MnO2 deposited per unit area, called the area density, calculated from the deposition charge, was controlled via the deposition time. The MnO2 films were characterized using various techniques like SEM, XPS, Raman spectroscopy, etc. In 1.0 M NaSO4 solution, the capacitanc...