An antisymmetric cell structure for high-performance zinc bromine flow battery

Zinc-bromine flow batteries (ZBBs) remain a problem of designing a cell with high coulombic efficiency and stability. This problem is caused intrinsically by different phase transition in each side of the half-cells during charge-discharge process. This paper describes a ZBB with an antisymmetric ce...

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Veröffentlicht in:Journal of physics. Conference series 2017-12, Vol.939 (1), p.12021
Hauptverfasser: Kim, Yongbeom, Jeon, Joonhyeon
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description Zinc-bromine flow batteries (ZBBs) remain a problem of designing a cell with high coulombic efficiency and stability. This problem is caused intrinsically by different phase transition in each side of the half-cells during charge-discharge process. This paper describes a ZBB with an antisymmetric cell structure, which uses anode and cathode with different surface morphologies, for high-discharge capacity and reliability. The structure of the antisymmetric ZBB cell contains a carbon-surface electrode and a carbon-volume electrode in zinc and bromine half cells, respectively. To demonstrate the effectiveness of this proposed ZBB cell structure, Cyclic Voltammetry measurement is performed on a graphite foil and a carbon felt which are used as the surface and electrodes. Charge and discharge cyclic operations are also carried out with symmetric and antisymmetric ZBB cells combined with the two electrode types. Experimental results show that the arrangement of antisymmetric cell structure in ZBB provides a solution to the high performance and durability.
doi_str_mv 10.1088/1742-6596/939/1/012021
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subjects Bromine
Carbon
Discharge
Electrodes
Foils
Morphology
Phase transitions
Physics
Rechargeable batteries
Reliability engineering
Structural reliability
Zinc
title An antisymmetric cell structure for high-performance zinc bromine flow battery
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