氢取代石墨炔共轭框架化合物在锂离子电容器中的应用  

Application of hydrogen-substituted graphyne conjugated framework compounds in lithium ion capacitors

作　　者：李瑞辉 何建江 王庆富 LI Ruihui;HE Jianjiang;WANG Qingfu(Qingdao University of Science and Technology,College of Polymer Science and Engineering,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042

出　　处：《化工科技》2024年第6期6-11,31,共7页Science & Technology in Chemical Industry

基　　金：山东省自然科学基金面上项目(ZR2023ME003)。

摘　　要：锂离子电容器在电化学能量存储方面显示出了独特的应用前景,但受限于电极材料缺乏活性存储位点以及离子扩散速率较慢,通常展现出低的能量密度或功率密度。本文通过构筑具有优异离子和电子传输能力的氢取代石墨炔共轭框架化合物,显著提高了电极的循环性能和倍率性能。通过调控共轭框架化合物负极和活性炭正极的质量配比,在m(共轭框架化合物负极)∶m(活性炭正极)=1∶3时,所制备的锂离子电容器性能较优,其在110 W/kg的功率密度下,能量密度可以达到221 W·h/kg。即使将功率密度提高到11000 W/kg,能量密度仍可以达到114 W·h/kg,展现了良好的应用潜力。Lithium-ion capacitors exhibit significant potential in electrochemical energy storage fields,yet their energy and power densities are always constrained by the scarcity of active storage sites and sluggish ion diffusion rates in electrode materials.In this study,we significantly enhance the cycling and rate performance of electrodes by constructing hydrogen substituted graphdiyne conjugated framework with convenient ion diffusion and electron transport pathway.By adjusting the mass ratio of the conjugated framework anode and activated carbon cathode to be 1∶3,the lithium-ion capacitor delivers superior electrochemical performance.Specifically,the energy density of such device reaches 221 W·h/kg at a power density of 110 W/kg.The energy density remains at 114 W·h/kg even under a remarkable power density of 11000 W/kg,indicating its great potential in practical applications.

关 键 词：锂离子电容器 共轭框架化合物 氢取代石墨炔 能量密度 功率密度 离子传输 

分 类 号：O639.2[理学—高分子化学]