# Case study 1

**Source**: https://www.lboro.ac.uk/research/green-hydrogen/case-study-1/
**Parent**: https://www.lboro.ac.uk/research/green-hydrogen/

## Battery-electrolysers

This is an example of work within the team looking at low-cost production of hydrogen through a battery-electrolyser (similar functionality as the Delft-developed battolyser but using different chemistries). It starts life as a battery or flow battery that can produce hydrogen under electrolysis. The water consumption of this reaction is compensated by adding water to the electrolyte to avoid a concentration increase of the electrolyte that would subsequently affect the battery-electrolyser's chemistry.

The battery-electrolyser works by:

- Discharging as a battery when electricity demand exceeds generation
- Charging as a battery
- Use excess electricity to produce hydrogen

A battery-electrolyser was first developed at Delft University by Dr. Fokko Mulder et al. based on Nickel-Iron batteries. Loughborough has been investigating alternative battery-electrolyser chemistry solutions using more abundant materials.

We are looking at two different use cases, as shown below.

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***Battery-electrolysers in microgrids***

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***Battery-electrolysers using curtailed wind power***

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Our work includes, but is not limited to:

- Early TRL chemistry investigation
- Measurement and testing
- Modelling
- Prototyping
- Business case and use development

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### World’s first lead-acid battery-electrolyser for low-cost green hydrogen

[### Battery-electrolyser interview video

Electronic Test & Power Systems](https://etps.co.uk/uploadedfiles/Loughborough-Battolyser-Interview.mp4)

[### Development helps provide green hydrogen cooking and electricity for African communities](https://www.lboro.ac.uk/news-events/news/2023/december/loughboroughhelpsprovidegreenhydrogencookingandelectricityinafrican/)