Organopolysulfides as high-performance cathode materials for rechargeable aluminum-ion batteries
作者机构：Institute of Advanced Battery Materials and Devices Faculty of Materials and Manufacturing Beijing University of Technology Beijing 100124 China Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of Technology Beijing 100124 China College of Chemistry Zhengzhou University Zhengzhou 450001 China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第154卷第23期
页 面：159-165页
核心收录：
学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：financially supported by the National Natural Science Foundation of China(Grant Nos.22075007,92263206,and 21975006) the National Key R&D Program of China(Grant Nos.2022YFB2402600 and 2022YFB2404400) the Youth Beijing Schol-ars program(No.11000022T000000440694) Beijing Natural Sci-ence Foundation(Nos.KZ201910005002 and KZ202010005007)。
主 题：Aluminum-ion batteries Cathode materials Organopolysulfides High coulombic efficiency
摘 要：The development of aluminum-ion batteries(AIBs)is significantly confined by the limited high-performance cathode materials.Herein,organopolysulfides are investigated as active cathode materials to fabricate AIBs.A liquid-phase phenyl tetrasulfide(PTS)can deliver a capacity above 600 mAh g−1 after activation,with the maintenance of 253 mAh g−1 after 100 cycles.Owing to the different S locations,PTS shows several voltage plateaus and an average voltage of∼0.7 V vs.Al3+/Al with no decay upon cycling.More importantly,the liquid PTS can serve as a high-Coulombic-efficiency cathode(∼99.88%±0.57%after stabilization),enlighting the design of high-efficiency and low-resistance conversion-type cathode materials for AIBs.By experimental characterizations accompanied by theoretical calculations,it is found that PTS undergoes stepwise reaction procedures during discharge with final products of Al2S3 and AlCl2-coordinated phenyl sulfide,and partially reforms with elemental S and other organopolysulfides during charge.This study demonstrates new opportunities for the design of high-efficiency conversion-type cathode materials for advanced AIBs.
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