Trapping precursor-level functionalities in hierarchically porous carbons prepared by a pre-stabilization route for superior supercapacitors  

作　　者：Mulati Mansuer Ling Miao Yang Qin Ziyang Song Dazhang Zhu Hui Duan Yaokang Lv Liangchun Li Mingxian Liu Lihua Gan 

机构地区：[1]Shanghai Key Lab of Chemical Assessment and Sustainability,School of Chemical Science and Engineering,Tongji University,Shanghai 200092,China [2]College of Chemistry and Molecular Engineering,Zhengzhou University,Zhengzhou 450001,China [3]College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China

出　　处：《Chinese Chemical Letters》2023年第3期454-459,共6页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21875165,51772216,21905207 and 22172111);the Science and Technology Commission of Shanghai Municipality,China(Nos.20ZR1460300,19DZ2271500 and 22ZR1464100);Zhejiang Provincial Natural Science Foundation of China(No.LY19B010003);the Fundamental Research Funds for the Central Universities;the Large Equipment Test Foundation of Tongji University。

摘　　要：Versatile module design of precursor networks enables flexible functionalization of nano-carbon electrode materials to meet the adaptable energy-storage demand. Functionalized heterogeneous networks are more likely to decompose by swift temperature programming together with predesign module removal, so high functionality/network transfer from precursor to carbon is still a work in progress. A pre-stabilization route is proposed here to enhance the network strength at early pyrolysis and pin up precursor-level functionalities on the final carbon. Such strategy successfully fixes more electroactive N(4.28-8.86 wt%) into the resultant carbon microspheres compared with non-pretreated carbon(2.89wt%), as well as achieves broad ion-accessible platforms of 1575-2269 m^(2)/g with preset structural superiorities. As a result, a typical acidic device reveals an outstanding specific capacitance of 383 F/g at 10 mV/s. Taking advantage of a novel LiNO_(3)-PAM polymer electrolyte, the upgraded symmetric device displays the maximum specific capacitance of 229 F/g, along with a boosted energy density of 41.1 Wh/kg at 643.4 W/kg. This work opens up a feasible insight into realizing highly efficient precursor/electrode design toward superior system with outstanding energy/power feature and temperature applicability.

关 键 词：Carbon-based supercapacitors Quinone-amine network Pre-stabilization process Symmetric device Polymer electrolyte 

分 类 号：TM53[电气工程—电器] TQ127.11[化学工程—无机化工]