Excellent rate capability supercapacitor based on a free-standing PEDOT:PSS film enabled by the hydrothermal method. Issue 33 (5th April 2022)

• Record Type: Journal Article
• Authors: Su, Zhen; Jin, Yingzhi; Xiao, Yunchao; Zheng, Haolan; Yang, Zanzhong; Wang, Hao; Li, Zaifang
• Is Part Of: Chemical communications. Volume 58:Issue 33(2022)
• Page Start: 5088
• Page End: 5091
• Publication Date: 2022-04-05
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d2cc00427e
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : The free-standing PEDOT:PSS film is fabricated by the hydrothermal method. The film shows a rectangle characteristic and a high capacitance at the ultrahigh scan rate of 1300 mV s −1, attributed to the synergistic effect of temperature and pressure. Abstract : For the first time, herein, the hydrothermal method with H2 SO4 as the solvent is introduced to enhance the rate capability of free-standing pristine PEDOT:PSS films. The film with a record conductivity of 3188 S cm −1 displays a rectangular characteristic at an ultrahigh scan rate of 1300 mV s −1 and a stable specific capacitance of 110 F cm −3 from 0.1 to 100 A cm −3, with a capacitance retention of up to 94.8%. The flexible supercapacitor based on the films delivers a comparable energy density of 2.96 mW h cm −3 even at a high power density of 36 685 mW cm −3 . This study provides an effective method to prepare PEDOT:PSS films with outstanding electrochemical properties and potentially expand its applications in flexible devices.