Hollow tubular conjugated organic polymer for lithium batteries  

作　　者：Weijia Zhang Shibing Zheng Tao Ma Tianjiang Sun Zhanliang Tao 

机构地区：[1]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Centre,College of Chemistry,Nankai University,Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300071,China

出　　处：《Nano Research》2023年第2期2474-2479,共6页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51771094 and 21835004);the National Key Research and Development(R&D)Program of China(No.2016YFB0901500);the Ministry of Education of China(No.B12015);Tianjin Natural Science Foundation(No.18JCZDJC31500).

摘　　要：Polymerization is a valid strategy to solve the dissolution issue of organic electrode materials in aprotic electrolytes.However,conventional polymers usually with amorphous structures and morphology’s influence on electrochemistry have rarely been studied.Herein,a hollow tubular poly phenyl pyrene-4,5,9,10-tetraone(T-PPh-PTO)organic cathode material was designed and synthesized based on the concentration-gradient of the precursor(PTO-Br2)and asymmetrical internal diffusion during the reaction.The unique hollow structure endowed T-PPh-PTO with a short Li+diffusion path accompanied by a high diffusion Li+coefficient(D≈10−8 cm^(2)·s^(−1)).Thus,T-PPh-PTO presented a capacitance-dominated redox pseudocapacitance action with an outstanding rate performance(173 mAh·g^(−1)at 2 A·g^(−1))and high cycle stability(capacity retention ratio is 91.7%after 2,000 cycles).Our study leads to further developments in designing unique organic structures for energy storage.

关 键 词：conjugated organic polymer hollow tubular structure lithium batteries ionic migration 

分 类 号：TM912[电气工程—电力电子与电力传动]