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Updated: Nov 16, 2025
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A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
Published on: February 13, 2017
10.7K
Organic Multiple Redox Semi-Solid-Liquid Suspension for Li-Based Hybrid Flow Battery
Xuefeng Zhang1, Peiyao Zhang1, Hongning Chen1
1Chemical Hybrid Energy Novel Laboratory, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, Guangdong, P.R. China.
Chemsuschem
|February 24, 2021
Summary
This study introduces an organic multiple redox semi-solid-liquid suspension for lithium-based hybrid flow batteries. This novel approach enhances volumetric capacity and energy density using TEMPO and MPT active materials.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Lithium-based hybrid flow batteries offer high voltage and scalability.
- Limited volumetric capacity of catholytes hinders practical application.
Purpose of the Study:
- To develop a high-performance, low-cost organic multiple redox semi-solid-liquid (MRSSL) suspension for Li-based hybrid flow batteries.
- To overcome the volumetric capacity limitations of current flow battery systems.
Main Methods:
- Utilized 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) for high solubility in the liquid phase.
- Employed 10-methylphenothiazine (MPT) composite for high reversibility in the solid phase.
- Developed an organic MRSSL suspension combining TEMPO and MPT.
Main Results:
- Achieved a low voltage gap (<0.1 V) between liquid and solid phases.
- Demonstrated high cell voltage (≈3.4 V) and energy density (260 Wh/L).
- Reported high volumetric capacity (50 Ah/L) with applicable cycling performance.
Conclusions:
- The organic MRSSL suspension concept significantly increases volumetric capacity and energy density.
- Synergistic interactions between TEMPO and MPT reduce suspension viscosity.
- This approach offers a new pathway for advancing Li-based hybrid flow batteries using low-cost organic materials.
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