Molecular Engineering Design for High-Performance Aqueous Zinc-Organic Battery

作     者：Tianjiang Sun Weijia Zhang Qingshun Nian Zhanliang Tao Tianjiang Sun;Weijia Zhang;Qingshun Nian;Zhanliang Tao

作者机构：Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryHaihe Laboratory of Sustainable Chemical TransformationsRenewable Energy Conversion and Storage CenterNankai UniversityTianjin 300071People’s Republic of China CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringHefei National Laboratory for Physical Science at the MicroscaleUniversity of Science and Technology of China HefeiHefei 230026AnhuiPeople’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2023年第15卷第3期

页      面：98-111页

核心收录：

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(22279063 and 21835004) the National Key R&D Program of China(2016YFB0901500) Ministry of Education of China(B12015 and IRT13R30) the Haihe Laboratory of Sustainable Chemical Transformations for financial support。 

主　　题：Aqueous Zn-organic battery Small sulfur heterocyclic quinones Conjugated thioether skeleton Superlong cycling life H+-involved mechanism -60℃ 

摘      要：Novel small sulfur heterocyclic quinones(6a,16adihydrobenzo[b]naphtho[2′,3′:5,6][1,4]dithiino[2,3-i]thianthrene-5,7,9,14,16,18-hexaone(4S6Q)and benzo[b]naphtho[2′,3′:5,6][1,4]dithiino[2,3-i]thianthrene-5,9,14,18-tetraone(4S4Q))are developed by molecule structural design method and as cathode for aqueous zincorganic batteries.The conjugated thioether(–S–)bonds as connected units not only improve the conductivity of compounds but also inhibit their dissolution by both extendedπ-conjugated plane and constructed flexible molecular skeleton.Hence,the Zn//4S6Q and Zn//4S4Q batteries exhibit satisfactory electrochemical performance based on 3.5 mol L-1(M)Zn(ClO4)2electrolyte.For instance,the Zn//4S6Q battery obtains 240 and 208.6 mAh g^(-1)of discharge capacity at 150 mA g^(-1)and 30 A g^(-1),respectively.The excellent rate capability is ascribed to the fast reaction kinetics.This system displays a superlong life of 20,000 cycles with no capacity fading at 3 A g^(-1).Additionally,the H+-storage mechanism of the 4S6Q compound is demonstrated by ex situ analyses and density functional theory calculations.Impressively,the battery can normally work at-60℃benefiting from the anti-freezing electrolyte and maintain a high discharge capacity of 201.7 mAh g^(-1),which is 86.2%of discharge capacity at 25℃.The cutting-edge electrochemical performances of these novel compounds make them alternative electrode materials for Zn-organic batteries.