Steric hindrance modulation of hexaazatribenzanthraquinone isomers for high-capacity and wide-temperature-range aqueous proton battery  

作　　者：Mingsheng Yang Yuxin Hao Bei Wang Yan Wang Liping Zheng Rui Li Huige Ma Xinyu Wang Xiaoming Jing Hongwei Li Mengxiao Li Zhihui Wang Yujie Dai Guangcun Shan Mingjun Hu Jun Luo Jun Yang 

机构地区：[1]School of Materials Science and Engineering,Beihang University,Beijing 100191,China [2]Beijing Institute of Nanoenergy&Nanosystems,Chinese Academy of Sciences,Beijing 101400,China [3]Center on Nanoenergy Research,School of Physical Science&Technology,Guangxi University,Nanning 530004,China [4]School of Chemistry and Chemical Engineering,Center on Nanoenergy Research,Guangxi University,Nanning 530004,China [5]School of Instrumentation Science and Opto-electronics Engineering,Beihang University,Beijing 100191,China [6]ShenSi Lab,Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Shenzhen 518110,China

出　　处：《National Science Review》2024年第4期265-276,共12页国家科学评论（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(22371010,21771017,51702009 and 51971157);the‘Hundred Talents Program’of the Chinese Academy of Sciences,the National Key R&D Program of China(2016YFE0204200);the Fundamental Research Funds for the Central Universities,Shenzhen Science and Technology Program(JCYJ20210324115412035,JCYJ2021-0324123202008,JCYJ20210324122803009 and ZDSYS20210813095534001);the Guangdong Basic and Applied Basic Research Foundation(2021A1515110880).

摘　　要：Organic materials with rich active sites are good candidates of high-capacity anodes in aqueous batteries,but commonly low utilization of active sites limits their capacity.Herein,two isomers,symmetric and asymmetric hexaazatribenzanthraquinone(s-HATBAQ and a-HATBAQ),with rich active sites have been synthesized in a controllable manner.It has been revealed for the first time that a sulfuric acid catalyst can facilitate the stereoselective formation of s-HATBAQ.Attributed to the reduced steric hindrance in favor of proton insertion as well as the amorphous structure conducive to electrochemical dynamics,s-HATBAQ exhibits 1.5 times larger specific capacity than a-HATBAQ.Consequently,the electrode of s-HATBAQ with 50%reduced graphene oxide(s-HATBAQ-50%rGO)delivers a record high specific capacity of 405 mAh g^(−1) in H2SO4 electrolyte.Moreover,the assembled MnO_(2)//s-HATBAQ-50%rGO aqueous proton full batteries show an exceptional cycling stability at 25℃ and can maintain∼92% capacity after 1000 cycles at 0.5 A g^(−1) at−80℃.This work demonstrates the controllable synthesis of isomers,showcases a wide-temperature-range prototype proton battery and highlights the significance of precise molecular structure modulation in organic energy storage.

关 键 词：STEREOISOMERS steric effect aqueous battery super cycling stability ultra-low temperature proton battery 

分 类 号：TM91[电气工程—电力电子与电力传动] O626[理学—有机化学]