Evolution of Stabilized 1T‐MoS<sub>2</sub> by Atomic‐Interface Engineering of 2H‐MoS<sub>2</sub>/Fe−N<sub><i>x</i></sub> towards Enhanced Sodium Ion Storage
Huicong Xia, Lingxing Zan, Pengfei Yuan, Gan Qu, Hongliang Dong, Yifan Wei, Yue Yu, Zeyu Wei, Wenfu Yan, Jin‐Song Hu, Dehui Deng, Jianan Zhang
Abstract
Abstract Metallic conductive 1T phase molybdenum sulfide (MoS 2 ) has been identified as promising anode for sodium ion (Na + ) batteries, but its metastable feature makes it difficult to obtain and its restacking during the charge/discharge processing result in part capacity reversibility. Herein, a synergetic effect of atomic‐interface engineering is employed for constructing 2H‐MoS 2 layers assembled on single atomically dispersed Fe−N−C (SA Fe−N−C) anode material that boosts its reversible capacity. The work‐function‐driven‐electron transfer occurs from SA Fe−N−C to 2H‐MoS 2 via the Fe−S bonds, which enhances the adsorption of Na + by 2H‐MoS 2 , and lays the foundation for the sodiation process. A phase transfer from 2H to 1T/2H MoS 2 with the ferromagnetic spin‐polarization of SA Fe−N−C occurs during the sodiation/desodiation process, which significantly enhances the Na + storage kinetics, and thus the 1T/2H MoS 2 /SA Fe−N−C display a high electronic conductivity and a fast Na + diffusion rate.