Recent Development of Electrolytes for Aqueous Organic Redox Flow Batteries (Aorfbs): Current Status, Challenges, and Prospects

Muhammad Mansha, Asif Ayub, Ibad Ali Khan, Shahid Ali, Atif Saeed Alzahrani, Majad Khan, Muhammad Arshad, Abdul Rauf, Safyan Akram Khan*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

Abstract

In recent years, aqueous organic redox flow batteries (AORFBs) have attracted considerable attention due to advancements in grid-level energy storage capacity research. These batteries offer remarkable benefits, including outstanding capacity retention, excellent cell performance, high energy density, and cost-effectiveness. The organic electrolytes in AORFBs exhibit adjustable redox potentials and tunable solubilities in water. Previously, various types of organic electrolytes, such as quinones, organometallic complexes, viologens, redox-active polymers, and organic salts, were extensively investigated for their electrochemical performance and stability. This study presents an overview of recently published novel organic electrolytes for AORFBs in acidic, alkaline, and neutral environments. Furthermore, it delves into the current status, challenges, and prospects of AORFBs, highlighting different strategies to overcome these challenges, with special emphasis placed on their design, composition, functionalities, and cost. A brief techno-economic analysis of various aqueous RFBs is also outlined, considering their potential scalability and integration with renewable energy systems.

Original languageEnglish
Article numbere202300284
JournalChemical Record
Volume24
Issue number1
DOIs
StatePublished - Jan 2024

Bibliographical note

Publisher Copyright:
© 2023 The Chemical Society of Japan & Wiley-VCH GmbH.

Keywords

  • Organic electrolytes
  • advantages of AORFBs
  • challenges
  • grid-scale storage
  • molecular engineering
  • technoeconomic analysis

ASJC Scopus subject areas

  • General Chemistry
  • Biochemistry
  • General Chemical Engineering
  • Materials Chemistry

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