Considering that electrode materials for supercapacitors suffer poor cycling stability and low electrons transfer at high current density, combination with carbonaceous materialhas has been devoted to strengthen the conductivity and improve the specific power and specific energy. Herein, the Ni_0.85Se@C/rGO composite with tiny Ni_0.85Se nanosheeets anchoring on rGO and coated by amorphous carbon has been successfully synthesized via programmed temperature controlling. As combined with dual modified carbon, which not only can ensure the electric connection of all the tiny Ni_0.85Se nanosheets, but also provide confinement to inhibit disintegration, the Ni_0.85Se@C/rGO//AC supercapacitor device shows a thrilling specific energy of 45.6 Wh kg⁻¹ and 31.4 Wh kg⁻¹ at specific power of 463.5 W kg⁻¹ and 9.4 kW kg⁻¹, respectively.

考虑到用于超级电容器的电极材料具有差的循环稳定性和在高电流密度下的低电子传递，已经致力于与碳质材料的结合以增强电导率并提高比功率和比能量。在此，通过程序控制的温度已经成功地合成了Ni _0.85 Se @ C / rGO复合材料，该复合材料具有固定在rGO上并由无定形碳包覆的微小Ni _0.85 Se纳米片。与双重改性碳结合使用，不仅可以确保所有微小的Ni _0.85 Se纳米片的电连接，而且还可以提供限制作用以抑制崩解，Ni _0.85Se @ C / rGO // AC超级电容器装置在463.5 W kg ^-1和9.4 kW kg ^-1的比功率下分别显示出45.6 Wh kg ^-1和31.4 Wh kg ^-1的惊险比能。