首页|导电共轭聚合物与碳布复合制备高能量密度和功率密度电极

导电共轭聚合物与碳布复合制备高能量密度和功率密度电极

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导电共轭聚合物复合改性制得兼具电容及电池特性电极材料是不牺牲功率密度前提下,开发高能量密度超级电容器的可取之法.本文工作通过吸电子基团强化分子间作用力,提高材料电荷传递性能,提升电极材料的循环稳定性的同时使其具有了较高能量密度和功率密度.采用原位化学氧化聚合法在CC表面聚合了以2,3-二氯-5,6-二氰基对苯醌为受体,3,3-二甲基联苯胺、3,3-二甲氧基联苯胺、3,3-二羟基联苯胺为给体的3种D-A型导电共轭聚合物.研究了 3种柔性复合电极的电容特性.共聚物给体端为3,3-二甲氧基联苯胺的P2/CC为活性成分的电极材料在小于70 mV·s-1范围内呈现快速电化学动力学特征且在0.5 A·g-1的电流密度下放电比电容达到686.27 F·g-1,充放电循环5000次后比电容的保持率为99.70％.复合电极在497.46 W·kg-1功率密度下也达到了 50.66 Wh·kg-1的高能量密度.柔性复合电极的制备为低成本研发具有高能量密度和功率密度新型电极材料以进一步提升超级电容器性能给予了有意义的参考.
High Energy Density and Power Density Electrodes Prepared by Conductive Conjugated Polymers and Carbon Cloth
It is a desirable method to develop high energy density supercapacitors without sacrificing power density to prepare electrode materials with both capacitance and battery characteristics by the modification of conductive conjugated polymers.In this study,the intermolecular force is strengthened by electron-withdrawing groups to improve the charge transfer performance of materials,improve the cyclic stability of electrode materials and make them have higher energy density and power density.We use liquid-phase treatment to treat CC and in situ oxidation polymerization to polymerize three D-A type conductive conjugated polymers on the surface of CC with 2,3-dichloro-5,6-dicyano-p-benzoquinone as the acceptor and 3,3-dimethylbenzidine,3,3-dimethoxybenzidine and 3,3-dihydroxybenzidine as the donors.We studied the capacitance characteristics of three flexible composite electrodes.The P2/CC electrode material with a donor end of 3,3-dimethoxybenzidine exhibits fast electrochemical kinetics characteristics in the range of less than 70 mV.s-1,its discharge specific capacitance reaches 686.27 F·g-1 at a current density of 0.5 A·g-1,and the retention rate of the specific capacitance after 5000 charge discharge cycles is 99.70％.The composite electrode also achieved an energy density of 50.66 Wh·kg-1 at an ultra-high power density of 497.46 W·kg-1.The organic-inorganic synergistic effect between conductive conjugated polymers and CC helps to improve the conductivity and stability of electrodes,and the pseudocapacitive charge storage behavior of conductive conjugated polymers enhances the discharge specific capacity.The preparation of flexible composite electrodes provides a favorable reference for the low-cost development of new electrode materials with high energy density and power density to further improve the performance of supercapacitors.

D-A type conductive polymerCarbon clothFlexible electrodesHigh energy densityHigh power density

何杉杉、何婷婷、周紫君、阿孜古丽·木尔赛力木

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新疆师范大学化学化工学院新疆储能与光电催化材料重点实验室 乌鲁木齐 830054

D-A型导电聚合物 碳布 柔性电极 高能量密度 高功率密度

"天山英才"领军人才项目新疆储能与电催化材料重点实验室校级招标课题重点项目新疆师范大学研究生科研创新项目新疆师范大学大学生创新训练计划

TSYCLJ2023011XJDX1709-2022-01XSY202301004X202210762101

2024

10.11777/j.issn1000-3304.2024.24007

高分子学报
中国科学院化学研究所 中国化学会

高分子学报

CSTPCD北大核心
影响因子：0.844
ISSN：1000-3304
年,卷(期)：2024.55(8)
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