Li Tiansheng, Zhao Zhifeng, Su Zhanhua, Sun Rui, Li Xiaofeng, Shang Yongchen
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, 150025, China.
College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000, China.
Dalton Trans. 2022 Nov 1;51(42):16111-16118. doi: 10.1039/d2dt02532a.
Although the preparation of transition metal sulfides/oxides electrodes has been relatively perfected, it is still challenging to fabricate multi-component transition metal sulfides/oxides core-shell structure electrodes with excellent electrochemical performance. Herein, CoMoO/MoO@CuCoNi-S grown on nickel foam (NF) is first synthesized facile hydrothermal and electrodeposition methods. The CoMoO/MoO@CuCoNi-S electrode presents an exceptional specific capacitance (2600.0 F g at 1 A g) and 68.3% of its initial capacitance at 10 A g. Moreover, a CoMoO/MoO@CuCoNi-S//active carbon (AC) device is assembled for determining its electrochemical application. It reveals a high energy density of 42.1 W h kg at a power density of 800.2 W kg, an extended voltage window of 1.6 V and excellent stability with 96.9% retention after 5000 cycles at 2 A g. This work offers a reference case for the development of multi-component transition metal sulfides/oxides core-shell structure composites for energy storage.
尽管过渡金属硫化物/氧化物电极的制备已经相对完善，但制备具有优异电化学性能的多组分过渡金属硫化物/氧化物核壳结构电极仍然具有挑战性。在此，通过简便的水热和电沉积方法首次合成了生长在泡沫镍（NF）上的CoMoO/MoO@CuCoNi-S。CoMoO/MoO@CuCoNi-S电极具有出色的比电容（在1 A g时为2600.0 F g），在10 A g时其初始电容保留率为68.3%。此外，组装了CoMoO/MoO@CuCoNi-S//活性炭（AC）器件以确定其电化学应用。在800.2 W kg的功率密度下，它显示出42.1 W h kg的高能量密度，1.6 V的扩展电压窗口以及在2 A g下5000次循环后96.9%的保留率的出色稳定性。这项工作为开发用于能量存储的多组分过渡金属硫化物/氧化物核壳结构复合材料提供了一个参考案例。
