Effect of Aggregation Structure on Capacitive Energy Storage in Conducting Polymer Films

Chemphyschem. 2024 Apr 12:e202400103. doi: 10.1002/cphc.202400103. Online ahead of print.ABSTRACTConducting polymers (CPs), a significant class of electrochemical capacitor electrode materials, exhibit exceptional capacitive energy storage performance in aqueous electrolytes. Current research primarily concentrates on enhancing the electrical conductivity and capacitive performance of CPs via molecular design and structural control. However, the absence of a comprehensive understanding of the impact of molecular chain spatial order on ion/electron transport and capacitive performance impedes the development and optimization of advanced electrode materials. Here, a solvent treatment strategy is employed to modulate the molecular chain spatial order of PEDOT:PSS films. The results of electrochemical performance tests and Grazing Incidence Wide Angle X-ray Scattering (GIWAXS) show that PEDOT:PSS films with both face-on and edge-on orientations exhibit exceptional electronic conductivity and ion diffusion efficiency, with capacitive performance 1.33 times higher than that of PEDOT:PSS films with only edge-on orientation. Consequently, molecular chain orientations conducive to charge transport not only enhance inter-chain coupling, but also effectively reduce ion transport resistance, enabling efficient capacitive energy storage. This research provides novel insights for the design and development of higher performance CPs-based electrode materials.PMID:38606697 | DOI:10.1002/cphc...

Source: Chemphyschem - April 12, 2024 Category: Chemistry Authors: Na Li Yeye Wang Wendi Zhao Zhihong Chen Peipei Liu Weiqiang Zhou Fengxing Jiang Congcong Liu Jingkun Xu Source Type: research