Xie Tian, Xu Jinxiao, Wang Jie, Ma Chuanli, Su Linghao, Dong Fengying, Gong Liangyu
College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, China.
Front Chem. 2020 Feb 27;8:62. doi: 10.3389/fchem.2020.00062. eCollection 2020.
A facile hydrothermal approach was adopted to the direct synthesis of bimetallic sulfide (CuCoS) on carbon cloth (CC) without binders for the supercapacitor's electrodes. A possible formation mechanism was proposed. The prepared bimetallic electrode exhibited a high specific capacitance (Csp) of 1,312 F·g at 1 A·g, and an excellent capacitance retention of 94% at 5 A·g over 5,000 cycles. In addition, the asymmetric supercapacitor (CuCoS/CC//AC/CC) exhibited energy density (42.9 wh·kg at 0.8 kW·kg) and outstanding cycle performance (80% initial capacity retention after 5,000 cycles at 10 A·g). It should be noted that the electrochemical performance of a supercapacitor device is quite stable at different bending angles. Two charged devices in series can light 28 red-colored LEDs (2.0 V) for 5 min. All of this serves to indicate the potentially high application value of CuCoS.
采用一种简便的水热法在无粘结剂的碳布（CC）上直接合成用于超级电容器电极的双金属硫化物（CuCoS）。提出了一种可能的形成机理。制备的双金属电极在1 A·g时表现出1312 F·g的高比电容（Csp），在5 A·g下5000次循环后电容保持率高达94%。此外，非对称超级电容器（CuCoS/CC//AC/CC）在0.8 kW·kg时能量密度为42.9 wh·kg，在10 A·g下5000次循环后具有出色的循环性能（初始容量保持率为80%）。值得注意的是，超级电容器装置在不同弯曲角度下的电化学性能相当稳定。两个串联的充电装置可以点亮28个红色LED（2.0 V）达5分钟。所有这些都表明CuCoS具有潜在的高应用价值。
