Polypyrrole as an ultrafast organic cathode for dual-ion batteries  

作　　者：Tao Sun Qi-Qi Sun Yue Yu Xin-Bo Zhang 

机构地区：[1]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022,PR China [2]National&Local United Engineering Laboratory for Power Batteries,Faculty of Chemistry,Northeast Normal University,Changchun,Jilin,130024,PR China

出　　处：《eScience》2021年第2期186-193,共8页电化学与能源科学（英文）

基　　金：This work was financially supported by National Key R&D Program of China(2017YFA0206700);National Natural Science Foundation of China(21725103);K.C.Wong Education Foundation(GJTD-2018-09);Jilin Province Science and Technology Development Plan Funding Project(20200201079JC);Jilin Province Capital Construction Funds Project(2020C026-1).

摘　　要：Organic electrode materials based on the chemical bond cleavage/recombination working principle usually produce unimpressive reaction kinetics and stability.In this work,polypyrrole(PPy)is investigated as an ultrafast(87%retention at 20 A g^(-1))and stable(83%retention across 3000 cycles)cathode material in PPy|graphite dualion batteries.The fast intrinsic reaction kinetics,coupled with a capacitance-dominated mechanism,enable PPy to bypass the sluggish chemical bond rearrangement process.Electrochemically induced secondary doping improves the ordered aggregation of polymer chains and thus has a profound impact on anion diffusion and electrical conductivity.The excellent rate capability presented here changes our understanding of organic electrode materials and could prove useful for designing ultrafast rechargeable electrochemical devices.

关 键 词：POLYPYRROLE Organic electrode Conductive polymers Dual-ion batteries 

分 类 号：O64[理学—物理化学]