Electronically coupled layered double hydroxide/MXene quantum dot metallic hybrids for high-performance flexible zinc–air batteries

作     者：Xiaotong Han Nannan Li Peixun Xiong Min Gyu Jung Yingbo Kang Qingyun Dou Qing Liu Jin Yong Lee Ho Seok Park 

作者机构：School of Chemical EngineeringSungkyunkwan University(SKKU)SuwonRepublic of Korea Department of ChemistryInstitute of Basic ScienceSungkyunkwan UniversitySuwonRepublic of Korea Department of Health Sciences and TechnologySamsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwonRepublic of Korea 

出 版 物：《InfoMat》 (信息材料（英文）)

年 卷 期：2021年第3卷第10期

页      面：1134-1144页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：Ministry of Education,Grant/Award Number:NRF-2019R1A6A1A10073079 National Research Foundation of Korea,Grant/Award Numbers:2020M2D8A2070866,2020R1A3B2079803 

主　　题：2D quantum dots flexible battery metallic hybrids oxygen electrochemistry Zn-air battery 

摘      要：Precise control of the local electronic structure and properties of electrocatalysts is important for enhancing the multifunctionality and durability of electrocatalysts and for correlating the structure/chemistry with the catalytic ***,we report electronically coupled metallic hybrids of NiFe layered double hydroxide nanosheet/Ti3C2 MXene quantum dots deposited on a nitrogen-doped graphene surface(LDH/MQD/NG)for high-performance flexible Zn-air batteries(ZABs).As verified from the Mott-Schottky and Nyquist plots,as well as spectroscopic,electrochemical,and computational analyses,the electronic and chemical coupling of LDH/MQD/NG modulates the local electronic and surface structure of the active LDH to provide metallic conductivity and abundant active sites,leading to significantly improved bifunctional activity and electrocatalytic *** rechargeable ZABs with LDH/MQD/NG hybrids are superior to the previous LDH-based ZABs,demonstrating a high power density(113.8 mW cm^(-2))and excellent cycle stability(150 h at 5 mA cm^(-2)).Moreover,the corresponding quasi solid-state ZABs are completely flexible and practical,affording a high power density of 57.6 mW cm^(-2)even in the bent state,and in real-life operation of tandem cells for powering various electronic devices.