Center for Advanced Materials Research, Zhongyuan University of Technology , Zhengzhou 450007, China.
College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China.
ACS Appl Mater Interfaces. 2017 Nov 22;9(46):40655-40670. doi: 10.1021/acsami.7b12392. Epub 2017 Nov 7.
Portable electronics and electric or hybrid electric vehicles are developing in the trend of fast charge and long electric mileage, which ask us to design a novel electrode with sufficient electronic and ionic transport channels at the same time. Herein, we fabricate a uniform hollow-urchin-like NiCo(CO)(OH)·0.11HO electrode material through an easy self-generated and resacrificial template method. The one-dimensional chain-like crystal structure unit containing the metallic bonding and the intercalated OH and HO endow this electrode material with abundant electronic and ionic transport channels. The hollow-urchin-like structure built by nanorods contributes to the large electrode-electrolyte contact area ensuring the supply of ions at high current. CNTs are employed to transport electrons between electrode material and current collector. The as-assembled NC-CNT-2//AC supercapacitor device exhibits a high specific capacitance of 108.3 F g at 20 A g, a capacitance retention ratio of 96.2% from 0.2 to 20 A g, and long cycle life. Comprehensive investigations unambiguously highlight that the unique hollow-urchin-like NiCo(CO)(OH)·0.11HO electrode material would be the right candidate for advanced next-generation supercapacitors.
便携式电子设备和电动或混合动力汽车的发展趋势是快速充电和长续航里程，这要求我们设计一种新型电极，同时具备充足的电子和离子传输通道。在此，我们通过一种简单的自生成和再牺牲模板方法制备了均匀的空心海胆状 NiCo(CO)(OH)·0.11HO 电极材料。一维链状晶体结构单元包含金属键和插层的 OH 和 HO，赋予了这种电极材料丰富的电子和离子传输通道。纳米棒构建的空心海胆状结构有助于增加电极-电解质的接触面积，确保在高电流下供应离子。CNTs 用于在电极材料和集流器之间传输电子。组装的 NC-CNT-2//AC 超级电容器器件在 20 A g 下表现出 108.3 F g 的高比电容，在 0.2 到 20 A g 之间具有 96.2%的电容保持率和长循环寿命。综合研究明确地突出了这种独特的空心海胆状 NiCo(CO)(OH)·0.11HO 电极材料将是先进的下一代超级电容器的理想候选材料。
