Recent research progress of conductive polymer-based supercapacitor electrode materials

Abstract

With the serious impact of fossil fuels on the environment and the rapid development of the global economy, the development of clean and usable energy storage devices has become one of the most important themes of sustainable development in the world today. Supercapacitors, known as ultracapacitors, have been supposed to be one of the most promising candidates to meet the requirements of human sustainable development, due to their advantages such as high capacity, high power density, high charging/discharging speed, long cycle life, and low processing cost. However, the low energy density of supercapacitors limits their large-scale application. Therefore, it is of great significance to develop high energy density supercapacitors and use them as power sources for practical devices. Conductive polymer-based electrode materials have unique advantages such as high theoretical capacitance, good conductivity, and good flexibility, and have high potential in supercapacitors. The research on conductive polymer-based electrode materials has promoted the rapid development of the field of supercapacitors. This review summarizes recent research progress on conductive polymers (including polypyrrole, polyaniline, and polythiophene), conductive polymer-based binary composites, and conductive polymer-based ternary and quaternary composites for supercapacitor electrodes. Furthermore, a summary of the use of conductive polymer-based textiles and fibers for flexible supercapacitors is also presented, along with the current challenges and future perspectives for conductive polymer-based supercapacitors.

Development of PANI/FeS2/MnO2 Composite Electrode Materials for High‐Performance Supercapacitors

“…[7] However, as an electrode material, it is easy to expand and contract during charge and discharge, resulting in poor cycle stability. [8] Therefore, by doping carbon and transition metal oxides/sulfides into PANI to construct composite structures, when continuous charging and discharging, the volume of polyaniline can be effectively alleviated, thus enhancing its cycling stability. [9] Meanwhile, the composites exhibit better electrochemical properties than single materials due to the good synergistic effect between each component.…”

Improved Electrochemical Performance of Aqueous Hybrid Supercapacitors Using CrCo2O4 Mesoporous Nanowires: An Innovative Strategy toward Sustainable Energy Devices

“…Electrochemical energy storage (EES) systems possess widespread implications in medical, electronics, and smart gadgets. − In recent years, a variety of batteries and supercapacitors (SCs) have emerged as promising candidates in EES devices. − Although these emerging technologies can store and produce sufficient energy, batteries and SCs suffer from certain limitations. Recently, scientists have developed different types of EES systems including Li-ion batteries and Zn-ion batteries. , Currently, batteries encounter issues of limited power density, limited lifespan, and low charging speed, together with the widespread use of environmentally unfriendly electrolytes. , Although SCs meet the requirements of charging speed as well as power density, their low energy issues, which are far inferior to conventional batteries, , are inherent limitations. An intuitive approach to achieving appropriate energy density and power density is to combine efficient energy storing devices within a single electrochemical system .…”