具有更高电荷传输性能的Ni(OH)/M-MMT纳米复合材料作为高容量超级电容器的设计

Xu G M, Wang M, Bao H L, Fang P F, Zeng Y H, Du L, Wang X L

School of Mechanical Engineering, Liaoning Technical University, Fuxin, China.

School of Materials Science and Engineering, Liaoning Technical University, Fuxin, China.

Front Chem. 2022 May 26;10:916860. doi: 10.3389/fchem.2022.916860. eCollection 2022.

Nano-petal nickel hydroxide was prepared on multilayered modified montmorillonite (M-MMT) using one-step hydrothermal method for the first time. This nano-petal multilayered nanostructure dominated the ion diffusion path to be shorted and the higher charge transport ability, which caused the higher specific capacitance. The results showed that in the three-electrode system, the specific capacitance of the nanocomposite with 4% M-MMT reached 1068 F/g at 1 A/g and the capacity retention rate was 70.2% after 1,000 cycles at 10 A/g, which was much higher than that of pure Ni(OH) (824 F/g at 1 A/g), indicating that the Ni(OH)/M-MMT nanocomposite would be a new type of environmentally friendly energy storage supercapacitor.

首次采用一步水热法在多层改性蒙脱石（M-MMT）上制备了纳米花瓣状氢氧化镍。这种纳米花瓣状多层纳米结构使离子扩散路径缩短，电荷传输能力增强，从而导致比电容更高。结果表明，在三电极体系中，含4% M-MMT的纳米复合材料在1 A/g时的比电容达到1068 F/g，在10 A/g下循环1000次后的容量保持率为70.2%，远高于纯Ni(OH)（1 A/g时为824 F/g），表明Ni(OH)/M-MMT纳米复合材料将是一种新型的环保储能超级电容器。