Enhancing sulfur cathode process via a functionalized complex molecule
作者机构：Department of ChemistryCollege of Chemistry and Chemical EngineeringCollaborative Innovation Centre of Chemistry for Energy Materials(iChEM)and State Key Laboratory of Physical Chemistry of Solid SurfacesXiamen UniversityXiamen 361005China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第6期
页 面：8385-8393页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：supported by the National Natural Science Foundation of China(Nos.U1805254 21773192 22072117 and 22179112)
主 题：lithium-sulfur batteries organic molecule dual-function sulfur conversion shuttle effect
摘 要：Lithium-sulfur batteries are regarded as promising next-generation energy storage batteries for their ultra-high theoretical energy ***,the complex sulfur electrode process with sluggish sulfur conversion reactions is a critical issue for lithiumsulfur batteries,in which catalytic interfacial reactions and accelerated lithium-ion diffusion are the key *** previous work has shown that implanting functional molecules with multiple redox properties in the electrode can break through the conventional diffusion layer constraints and achieve forced *** this work,a functionalized complex molecule,methylene blue anthraquinone-2-sulfonate(MB-AQ),with multiple redox activities as well as abundant active sites,was synthesized and introduced into the sulfur *** addition to accelerating the transport of lithium ions by reversible inhaling and exhaling lithium ions,the MB-AQ can combine polysulfides by its active sites to accelerate sulfur conversion *** from two functions of accelerating ion diffusion and catalyzing interfacial reactions,MB-AQ/reduced graphene oxide(rGO)/S cathode can achieve high initial capacities of 884 and 674 mAh·g^(−1)with stable cycling of 700 and 1,000 times at 1 and 4 C,*** is worth mentioning that the capacity of 462 mAh·g^(−1)can be achieved even at a high current density of 6 *** work provides a new approach to enhancing the sulfur cathode process.
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