Fluorenone/fluorenol derivatives for aqueous redox flow batteries

US11591294B2 · kind B2 · utility

Assignee

• Battelle Memorial Institute · CH

Inventors

• Wei Wang · Kennewick, US
• Ruozhu Feng · Richland, US
• Xin Zhang · Zhenjiang, CN
• Aaron M. Hollas · Pasco, US
• Vijay Murugesan · Richland, US
• Nadeesha P. Nambukara Wellala · Richland, US
• Yuyan Shao · Richland, US
• Zimin Nie · Richland, US

Key dates

• Filing date: Nov 13, 2020
• Grant date: Feb 28, 2023
• Expiry date: Nov 13, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Aqueous electrolytes comprising fluorenone/fluorenol derivatives are disclosed. The electrolyte may be an anolyte for an aqueous redox flow battery. In some embodiments, the compound, or salt thereof, has a structure according to any one of formulas I-III where Q1-Q4 independently are CH, C(R1) or N, wherein 0, 1, or 2 of Q1-Q4 are N; Q5-Q8 independently are CH, C(R2), or N, wherein 0, 1, or 2 of Q5-Q8 are N; Y is C═O or C(H)OH; R1 and R2 independently are an electron withdrawing group; n is an integer >1; and x and y independently are 0, 1, 2, 3, or 4, where at least one of x and y is not 0.