Affiliation:
1. State Key Laboratory for Reliability and Intelligence of Electrical Equipment Hebei Key Laboratory of Smart Sensing and Human-Robot Interaction Engineering Research Center of the Ministry of Education for Intelligent Rehabilitation Equipment and Detection Technologies School of Mechanical Engineering Hebei University of Technology No. 5340, Xiping Road, Beichen District Tianjin 300401 China
Abstract
AbstractZn‐ion battery (ZIB) has drawn huge attentions as a prospective energy storage system for the next generation, but dendrite and side reaction issues related to Zn have limited their potential applications. Here, a combined approach involving the modification of surface texture and the implementation of a passivation layer is proposed to tackle the problem. A zinc‐silane composite layer is coated on (002)‐preferred Zn (ZSi@Zn) by selective acid etching, concomitant with the hydrolysis of Mercaptosilane. The preferred (002) crystal plane, in conjunction with the zinc‐silane composite layer, leads in integrated interfacial transport and deposition control. As a result, the ZSi@Zn electrode has dramatically increased stability and uniform Zn deposition behavior. Remarkably, it exhibits a Coulombic efficiency of approximately 99.4 %, a long lifespan of around 3000 hours at the current density of 1 mA cm−2 with a capacity of 0.5 mAh cm−2. The excellent reversibility of zinc persists with current densities of 2, 5, and 10 mA cm−2. Furthermore, Zn‐MnO2 battery constructed with ZSi@Zn also delivers excellent performance, manifesting a capacity retention of 88.4 % after 4000 cycles.
Subject
Electrochemistry,Electrical and Electronic Engineering,Energy Engineering and Power Technology