Liu Xiaoyun, Li Qian, Qin Yanli, Jiang Yueqiu
School of Science, Shenyang Ligong University Shenyang 110159 P. R. China
Department of Development and Planning, Shenyang Ligong University Shenyang 110159 P. R. China
RSC Adv. 2020 Jul 29;10(47):28324-28331. doi: 10.1039/d0ra05177b. eCollection 2020 Jul 27.
Heterogeneity can be used as a promising method to improve the electrochemical performance of electrode materials; thus, ZnCoO@PPy samples were prepared using a facile hydrothermal route and an electrochemical deposition process. The as-prepared products possess a specific capacitance of 605 C g at a current density of 1 A g. The asymmetric supercapacitor (ASC) possesses an energy density of 141.3 W h kg at a power density of 2700.5 W kg and capacity retention of 88.1% after 10 000 cycles, indicating its promising potential for energy devices. ZnCoO@PPy-50 exhibited an excellent OER performance and outstanding HER performance in alkaline media. As an advanced bifunctional electrocatalyst for overall water splitting, a voltage of 1.61 V at a current density of 50 mA cm outperforms the majority of noble-metal-free electrocatalysts.
异质性可作为一种很有前景的方法来改善电极材料的电化学性能；因此，采用简便的水热法和电化学沉积工艺制备了ZnCoO@PPy样品。所制备的产物在电流密度为1 A g时具有605 C g的比电容。不对称超级电容器（ASC）在功率密度为2700.5 W kg时的能量密度为141.3 W h kg，在10000次循环后的容量保持率为88.1%，表明其在能量装置方面具有广阔的应用潜力。ZnCoO@PPy-50在碱性介质中表现出优异的析氧反应（OER）性能和出色的析氢反应（HER）性能。作为一种用于全水分解的先进双功能电催化剂，在电流密度为50 mA cm时1.61 V的电压优于大多数无贵金属电催化剂。
