Crystal-Collapse-Induced Synthesis of High-Capacitance LaCoO_(x)/Co-Doped Carbon-Based Supercapacitors  

作　　者：Zhihao Deng Yuanbo Wang Wu Shao Jingwen He Jie Sheng Ronghao Cen Yufei Fu Wenjun Wu 

机构地区：[1]Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Shanghai Key Laboratory of Functional Materials Chemistry,Feringa Nobel Prize Scientist Joint Research Center,Institute of Fine Chemicals,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai200237,China

出　　处：《Transactions of Tianjin University》2025年第1期29-41,共13页天津大学学报(英文版)

基　　金：supported financially by National Natural Science Foundation of China(NSFC)(Nos.22478115,22075083);the Programme of Introducing Talents of Discipline to Universities(No.B16017).

摘　　要：The development of high-performance,reproducible carbon(C)-based supercapacitors remains a significant challenge because of limited specific capacitance.Herein,we present a novel strategy for fabricating LaCoO_(x) and cobalt(Co)-doped nanoporous C(LaCoO_(x)/Co@ZNC)through the carbonization of Co/Zn-zeolitic imidazolate framework(ZIF)crystals derived from a PVP-Co/Zn/La precursor.The unique ZIF structure effectively disrupted the graphitic C framework,preserved the Co active sites,and enhanced the electrical conductivity.The synergistic interaction between pyridinic nitrogen and Co ions further promoted redox reactions.In addition,the formation of a hierarchical pore structure through zinc sublimation facili-tated electrolyte diffusion.The resulting LaCoO_(x)/Co@ZNC exhibited exceptional electrochemical performance,delivering a remarkable specific capacitance of 2,789 F/g at 1 A/g and outstanding cycling stability with 92%capacitance retention after 3,750 cycles.Our findings provide the basis for a promising approach to advancing C-based energy storage technologies.

关 键 词：SUPERCAPACITOR High capacitance Carbon electrode Doping Crystal-collapse 

分 类 号：X70[环境科学与工程—环境工程]