Xu Xun, Chang Songyang, Hong Zhuozheng, Zeng Ye, Zhang Hao, Li Ping, Zheng Shizheng, Wang Zhoucheng, Duo Shuwang
Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China.
School of Materials and Mechanical & Electrical Engineering, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China.
Nanotechnology. 2021 Nov 12;33(5). doi: 10.1088/1361-6528/ac3356.
Owing to their favorable chemical stabilities and electronic conductivities, transition metal nitrides (TMNs) have been targeted as the potential electrode materials for the supercapacitors. Herein, 3D CrN@nitrogen-doped carbon nanosheet arrays (NCs) were successfully deposited on carbon paper (CP) by reactive magnetron sputtering method. The CrN@NCs@CP electrode exhibited satisfactory electrochemical properties: initially, the electrode showed a 132.1 mF cmspecific capacitance at 1.0 mA cmcurrent density; subsequently, the electrode demonstrated a 95.9% capacitance retention after 20 000 galvanostatic charge-discharge cycles at 5.0 mA cmcurrent density. The specific capacitance of the CrN@NCs@CP electrode was significantly higher than that of the CrN@CP electrode (4.1 mF cmat 1.0 mA cm). Furthermore, the symmetric supercapacitor that incorporated two CrN@NCs@CP electrodes demonstrated 5.28Wh cm(2.7 Wh kg) energy density at 0.41 mW cmpower density. These findings exemplify the suitability of the 3D composite electrodes of TMNs for energy storage application.
由于具有良好的化学稳定性和电子导电性，过渡金属氮化物（TMNs）已成为超级电容器潜在的电极材料。在此，通过反应磁控溅射法成功地在碳纸（CP）上沉积了三维CrN@氮掺杂碳纳米片阵列（NCs）。CrN@NCs@CP电极表现出令人满意的电化学性能：最初，该电极在1.0 mA cm电流密度下的比电容为132.1 mF cm；随后，在5.0 mA cm电流密度下进行20000次恒电流充放电循环后，该电极的电容保持率为95.9%。CrN@NCs@CP电极的比电容显著高于CrN@CP电极（在1.0 mA cm下为4.1 mF cm）。此外，采用两个CrN@NCs@CP电极的对称超级电容器在0.41 mW cm功率密度下的能量密度为5.28 Wh cm（2.7 Wh kg）。这些发现例证了TMNs三维复合电极在能量存储应用中的适用性。
