α–α Coupling-Dominated PPy Film with a Well-Conjugated Structure for Superlong Cycle Life Supercapacitors

• DOI: 10.1021/acsami.3c17515
• Publication Date: 2024-02-05T19:39:17Z
• Authors: Jianhua Hong; Ziyang Dong; Xuezheng Chen; Wen Chen; De Li; Feng Yu; Yong Chen
• Keywords: Polypyrrole

As the electrode of a supercapacitor, polypyrrole (PPy) inevitably suffers from structural rupture during repeated doping/dedoping processes and releases low practical capacitance due to large amount aggregation or cross-linking in PPy chains. The coupling mode (α–α, α–β, β–β coupling) pyrroles is critical conjugated structure, conductivity, cycling stability PPy. Here, we prepared an α–α coupling-dominated film via simple frozen interfacial polymerization. with nanostructure exposes more electrochemical active sites for electrode, which can enhance capacitance. high proportion results degree π-conjugation planar structure that effectively improve reversible ion transport efficiency promote uniform stress distribution charge discharge process. assembled symmetric water-based supercapacitor delivers specific 267.1 F g–1 at 1 A 266.7 5 exhibits outstanding performance above 200 even after 60,000 cycles.