Qiao Fan, , , Kai Zhang, , , Yufei Liu, , , Chong Chen, , , Lanlan Wei, , , Yucheng Yin, , , Tingting Luo, , , Shigui Peng, , , Min He*, , and , Jie Yu*,
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引用次数: 0
摘要
本研究展示了一种分子工程策略，通过精确控制两亲嵌段共聚物PSS-b- papeg（聚（苯乙烯磺酸酯）-嵌段聚（烯丙氧基聚乙二醇））的结构来优化PEDOT:PSS的电容性能。通过控制聚合合成了5种PSS:PAPEG比例分别为2:1,1.5:1,1:1,1:1.5和1:2的共聚物，并将其整合到PEDOT（聚（3,4-乙烯二氧噻吩））基体中。电化学测试表明，由于微相分离双连续网络和多孔结构的协同作用，1:1比例的复合材料在1 a /g时的最大比电容为32.1 F/g。多尺度表征（XPS、SEM、TEM、AFM、BET和接触角测量）表明，1:1的比例形成了最佳的导电途径、界面掺杂和离子扩散通道。本研究确立了块比工程是平衡导电聚合物基超级电容器电极材料的电导率和离子路径的有效方法，为高性能储能材料提供了理论基础。
Engineering PSS-b-PAPEG (Poly(styrenesulfonate)-block-Poly(Allyloxy Polyethylene Glycol)) Block Copolymers for Bicontinuous PEDOT (Poly(3,4-Ethylenedioxythiophene)):PSS Networks: Unlocking Maximum Capacitance via Optimal Block Ratio Tuning
This work demonstrates a molecular engineering strategy to optimize the capacitive performance of PEDOT:PSS by precisely controlling the structure of the amphiphilic block copolymer PSS-b-PAPEG (poly(styrenesulfonate)-block-poly(allyloxy polyethylene glycol)). Five copolymers with PSS:PAPEG ratios of 2:1, 1.5:1, 1:1, 1:1.5, and 1:2 were synthesized via controlled polymerization and integrated into a PEDOT (poly(3,4-ethylenedioxythiophene)) matrix. Electrochemical testing revealed that the 1:1 ratio composite exhibited a maximum specific capacitance of 32.1 F/g at 1 A/g, attributed to the synergistic effects of microphase-separated dual continuous networks and porous structures. Multiscale characterization (XPS, SEM, TEM, AFM, BET, and contact angle measurements) revealed that the 1:1 ratio forms optimal conductive pathways, interfacial doping, and ionic diffusion channels. This study establishes that block ratio engineering is an effective method for balancing conductivity and ionic pathways in conductive polymer-based supercapacitor electrode materials, providing a theoretical basis for high-performance energy storage materials.
期刊介绍：
ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.
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