Zongbin Hao, Xingchen He, Hongdou Li, Denis Trefilov, Yangyang Song, Yang Li, Xinxin Fu, Yu-Shuang Cui, Shaochun Tang, Haixiong Ge, Yan-Feng Chen
Pseudocapacitance holds great promise for energy density improvement of supercapacitors, but electrode materials show practical capacity far below theoretical values due to limited ion diffusion accessibility and/or low electron transferability. Herein, inducing two kinds of straight ion-movement channels and fast charge storage/delivery for enhanced reaction kinetics is proposed. Very thick electrodes consisting of vertically aligned and ordered arrays of NiCo2S4 nanoflake covered slender nickel columns (NCs) are achieved via a scalable route...
September 16, 2020: ACS Nano