@article{Jiang2020, 
author = {Guangshen Jiang and Xiaosa Xu and Haojie Han and Changzhen Qu and Hlib Repich and Fei Xu and Hongqiang Wang},
title = {Edge-enriched MoS2 for kinetics-enhanced potassium storage},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {10},
pages = {2763-2769},
keywords = {molybdenum disulfide, kinetics, enriched edges, potassium-ion batteries},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2925-3},
doi = {10.1007/s12274-020-2925-3},
abstract = {Potassium-ion batteries (PIBs) hold great promise as alternatives to lithium ion batteries in post-lithium age, while face challenges of slow reaction kinetics induced by the inherent characteristics of large-size K+. We herein show that creating sufficient exposed edges in MoS2 via constructing ordered mesoporous architecture greatly favors for improved kinetics as well as increased reactive sites for K storage. The engineered MoS2 with edge-enriched planes (EE-MoS2) is featured by three-dimensional bicontinuous frameworks with ordered mesopores of ~ 5.0 nm surrounded by thin wall of ~ 9.0 nm. Importantly, EE-MoS2 permits exposure of enormous edge planes at pore walls, renders its intrinsic layer spacing more accessible for K+ and accelerates conversion kinetics, thus realizing enhanced capacity and high rate capability. Impressively, EE-MoS2 displays a high reversible charge capacity of 506 mAh·g-1 at 0.05 A·g-1, superior cycling capacities of 321 mAh·g-1 at 1.0 A·g-1 after 200 cycles and a capacity of 250 mAh·g-1 at 2.0 A·g-1, outperforming edge-deficient MoS2 with nonporous bulk structure. This work enlightens the nanoarchitecture design with abundant edges for improving electrochemical properties and provides a paradigm for exploring high-performance PIBs.}
}