A Review of Redox Electrolytes for Supercapacitors
Open Access
- 3 June 2020
- journal article
- review article
- Published by Frontiers Media SA in Frontiers in Chemistry
- Vol. 8, 413
- https://doi.org/10.3389/fchem.2020.00413
Abstract
Supercapacitors (SCs) have attracted widespread attention due to their short charging/discharging time, long cycle life, and good temperature characteristics. Electrolytes have been considered as a key factor affecting the performance of SCs. They largely determine the energy density based on their decomposition voltage and the power density from their ionic conductivity. In recent years, redox electrolytes obtained a growing interest due to an additional redox activity from electrolytes, which offers an increased charge storage capacity in SCs. This article summarizes the latest progress in the research of redox electrolytes, and focuses on their properties, mechanisms, and applications based on different solvent types available. It also proposes potential solutions for how to effectively increase the energy density of the SCs while maintaining their high power and long life.Keywords
Funding Information
- National Natural Science Foundation of China (51702123)
This publication has 82 references indexed in Scilit:
- A simple and high-performance supercapacitor based on nitrogen-doped porous carbon in redox-mediated sodium molybdate electrolyteElectrochimica Acta, 2015
- N-doped structures and surface functional groups of reduced graphene oxide and their effect on the electrochemical performance of supercapacitor with organic electrolyteJournal of Power Sources, 2015
- High performance solid state supercapacitor based on a 2-mercaptopyridine redox-mediated gel polymerRSC Advances, 2015
- A redox mediator doped gel polymer as an electrolyte and separator for a high performance solid state supercapacitorJournal of Materials Chemistry A, 2015
- Organo-redox shuttle promoted protic ionic liquid electrolyte for supercapacitorJournal of Power Sources, 2015
- Energy-Density Enhancement of Carbon-Nanotube-Based Supercapacitors with Redox Couple in Organic ElectrolyteACS Applied Materials & Interfaces, 2014
- Mechanism investigation and suppression of self-discharge in active electrolyte enhanced supercapacitorsEnergy & Environmental Science, 2014
- An efficient redox-mediated organic electrolyte for high-energy supercapacitorJournal of Power Sources, 2014
- Synergistic interaction between redox-active electrolyte and binder-free functionalized carbon for ultrahigh supercapacitor performanceNature Communications, 2013
- Ionic liquids in supercapacitorsMRS Bulletin, 2013