Thursday, 17 May 2018: 09:40
Room 604 (Washington State Convention Center)
The scalability and design flexibility make redox flow batteries highly advantageous for grid-scale energy storage applications. Traditional flow batteries are based mainly on inorganic metal species, but their broad market penetration is greatly limited by the low energy density and high chemical costs. In this regard, water-soluble organic redox-active materials have demonstrated competitive property and performance merits, which makes them promising materials candidates to enable next-generation flow batteries.1
In this contribution, we will report our recent accomplishments in developing new aqueous organic flow battery materials and systems. A variety of high-performance organic candidates with different structures and reaction mechanisms have been identified and investigated that have produced decent cyclability over extended charge/discharge cycling. We will introduce our generic approaches to gain fundamental structure-activity-stability relationships for organic redox-active materials, including solvation interactions, electronic structures, and failure mechanisms. These understandings have greatly guided our materials development strategies to achieve significant improvement in solubility, cell voltage, and stability.
References
- X. Wei, W. Pan, W. Duan, A. Hollas, Z. Yang, B. Li, Z. Nie, J. Liu,D. Reed, W. Wang, V. Sprenkle, Materials and Systems for Organic Redox Flow Batteries: Status and Challenges. ACS Energy Lett. 2017, 2, 2187.