Superstable potassium metal batteries with a controllable internal electric field
作者机构：School of Physics and ElectronicsState Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082China School of Materials Science and Engineering and Key Laboratory of Nonferrous Metal Materials Science and EngineeringMinistry of EducationCentral South UniversityChangsha 410083China
出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)
年 卷 期：2023年第3卷第5期
页 面：813-821页
核心收录：
基 金：the National Nature Science Foundation of China(U20A20247 and 51922038)
主 题：Bionic structures K metal anodes Internal electric field Dendrite inhibition 3D scaffolds
摘 要：Stable potassium metal batteries(PMBs)are promising candidates for electrical energy storage due to their ability to reversibly store electrical energy at a low ***,dendritic growth and large volume changes hinder their practical ***,referring to the morphology and structure of a virus,a bionic virus-like-carbon microsphere(BVC)was designed as the anode host for a PMB.A BVC with a three-dimensional structure can not only control the electric field,which can suppress dendrite formation,but can also provide a larger space to accommodate the volume change during the cycle *** designed potassium(K)metal anode exhibits excellent cycle life and stability(during 1800 h of repeated plating/stripping of K at a current density of 0.1 mA cm−2,K-BVC can realize a very stable K metal anode with low voltage hysteresis).Stable cyclability and improved rate capability can be realized in a full cell using Prussian blue over 400 *** research provides a new idea for the development of stable K metal anodes and may pave the way for the practical application of next-generation metal batteries.
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