Redox Flow Batteries Dr Declan Bryans Energy Storage

Redox Flow Batteries Dr Declan Bryans

Energy Storage Demand

Redox Flow Battery Power Density Energy Density • Electrolyte stored in tanks and flowed through stacks • The concentration and volume determines energy density • Battery is charged when energy is produced at excess • And discharged when there is a demand for energy Electrode Negative Electrolyte Separator Positive Electrolyte • Overall electrode area determines the power density • Electrode candidates require: Ø Good conductivity Ø High surface area Ø Low cost to produce Ø Currently, 1000 m 2/ MW of carbon electrode used

Power Network Demonstration Centre (PNDC)

Installation

25 k. W/ 50 k. Wh Zn. Br 2

Impact to community

Impact to community (tuohy@esru. strath. ac. uk) http: //origin-concept. eu/

Impact to community

250 k. W/ 500 k. Wh Zn. Br 2

1 MWh Li-ion/ RFB Hybrid

EPFL, Switzerland

200 k. W/ 400 k. Wh VRFB

200 k. W/ 400 k. Wh VRFB Bryans, D. ; et. Batteries 2018, 4, 54.

Vehicle refueling • Petrol & diesel vehicle sales to phase out by 2032 • 25% of total energy consumption • PEM Fuel cell vehicles or batterypowered vehicles Bryans, D. ; et. Batteries 2018, 4, 54.

Self-discharge issues Bryans, D. ; et. Batteries 2018, 4, 54.

Hydrogen Production • Used in the manufacturing industry • 50% renewable energy by 2030 • Used as a fuel for heating applications • PEM fuel cells for electricity Bryans, D. ; et. Batteries 2018, 4, 54.

Energy Management • Scotland aim for 100% renewable electricity by 2020 • 19, 658 GWh of electricity produced • 12, 539 GWh from wind • In 2017, 71% of electricity came from renewable sources Bryans, D. ; et. Batteries 2018, 4, 54.

Areas for improvement

Carbon Felt Electrodes Direction of Flow Carbon Electrode Graphite Felts Carbon Electrode

Flow Cell Set-Up

Impact of Treatment

Impact of Treatment 2017 EE%: 50 2018 EE%: 82 2019 EE%: 91

Acknowledgements Dr Leonard E. A. Berlouis Dr Brian G. Mc. Millan Dr Jawwad Zafar Prof Hubert H. Girault Dr Veronique Amstutz Mr Marcin Toda