Suman, R and Yadav, SP and Ravikumar, MK and Patil, S and Shukla, AK (2021) Developing Shunt-Current Minimized Soluble-Lead-Redox-Flow-Batteries. In: Journal of the Electrochemical Society, 168 (12).
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Abstract
Shunt currents in membrane-less soluble-lead-redox-flow-batteries (SLRFB) are observed in open-circuit condition and found to depend on size of the stack, manifolds, flow rates and charge/discharge parameters. Ramifications of shunt currents on the performance of membrane-less SLRFB stacks with internal and external manifolds are reported. In the case of stacks with 3, 5 and 7-cells and internal manifold design, the charge current for the middle cell decreases by 3.3, 6, and 8.5, while the discharge current increases by 2.6, 5.5, and 6.6, respectively, for 3 A charge/discharge current. By contrast, no such adverse effect is observed for external manifold design. The current - potential studies show that while the stacks comprising 3 and 5-cells deliver a maximum power density of 35 mW cm-2, which declines to 15 mW cm-2 for the 7-cell stack with internal manifold design, while the power density remains invariant at 50 mW cm-2 for stacks with external manifold design. An 8-cell stack of 12 V, 50 mAh/cm2 specific capacity and 273 Wh energy storage capacity with 64 energy efficiency is also reported which shows good cyclability over 100 cycles with 95 coulombic efficiency when cycled at 20 mA cm-2 current density for 1 h duration. © 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of the Electrochemical Society |
| Publisher: | IOP Publishing Ltd |
| Additional Information: | The copyright for this article belongs to IOP Publishing Ltd |
| Keywords: | Energy efficiency, Charge current; Charge discharge current; Charge-discharge; Current increase; Discharge parameters; Discharges currents; Open circuit conditions; Performance; Rate discharge; Shunt current, Flow batteries |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 24 Jan 2022 06:11 |
| Last Modified: | 24 Jan 2022 06:11 |
| URI: | http://eprints.iisc.ac.in/id/eprint/71035 |
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