Xu Jiani, Xu Chaoting, Zhao Yanhong, Wu Jianghong, Hu Junqing
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China.
College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen, China.
Front Chem. 2019 Dec 13;7:831. doi: 10.3389/fchem.2019.00831. eCollection 2019.
Hollow CoO@MnO cubic nanomaterials are synthesized by ZIF-67@Mn-ZIF sacrificial precursor through a facile thermal treatment. As a kind of supercapacitor electrode material, it demonstrates high performances, such as specific capacitance of 413 F g at the current density of 0.5 A g; as the current densities raised from 0.5 to 10 A g (20 times increasing), there is still ~41% retention of its initial capacitance. These satisfactory electrochemical properties should be put down to the hollow and porous structure and the relative higher BET surface area, which supplies more reactive sites for charge and discharge processes.
通过ZIF-67@Mn-ZIF牺牲前驱体经简便热处理合成了中空CoO@MnO立方纳米材料。作为一种超级电容器电极材料，它展现出高性能，比如在电流密度为0.5 A g时比电容为413 F g；当电流密度从0.5 A g提高到10 A g（增加20倍）时，其初始电容仍保留约41%。这些令人满意的电化学性能应归因于中空多孔结构以及相对较高的BET表面积，这为充放电过程提供了更多的反应位点。
