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Posted on August 30, 2018 by  & 

Screen-printed electrodes could unlock hydrogen as an affordable fuel

Creating a renewable and sustainable source of energy from hydrogen that is also affordable could be unlocked with a university's innovative use of screen-printed nanotechnology. For more information see the IDTechEx report on Distributed Generation: Minigrid Microgrid Zero Emission 2018-2038.
Researchers at Manchester Metropolitan University will test a way to provide a green source of power that could be harnessed by remote communities who are off the electricity grid and reliant on imported diesel and petrol for generators.
The idea is to be able to print large volumes of inexpensive electrodes for use in electrolysers, a device that breaks water into its component oxygen and hydrogen. The hydrogen can then be stored or transported and fed when needed into fuel cells to create electricity on demand as a more dependable and efficient source of fuel than solar, wind, wave and tidal energy.
It builds on previous Manchester Metropolitan University proof-of-concept work into finding an alternate way of manufacturing electrodes that are traditionally reliant on components made out of expensive platinum and iridium, metal elements whose cost prohibits cheap reproduction.
Nanotechnology is embedded in carbon-based ink
Under the project, the Manchester Metropolitan University team - led by Craig Banks, Professor in Electrochemical and Nanotechnology - plan to screen print a succession of electrodes with the necessary graphene-like nanotechnology embedded in a fluid carbon-based printer ink.
The screen-printing technique, which will take place at the University's new £4 million Manchester Fuel Cell Innovation Centre, would enable the electrodes to be printed in novel shapes and styles, as well as allowing them to be mass produced for industrial applications.
Manchester Metropolitan University's prototype electrodes will be fitted into a stack of water electrolysis cells that will then be 'harsh weather tested' on Scotland's Orkney archipelago.
Difficult to balance energy generation with demand
Research Associate Dr Samuel Rowley-Neale said: "The electricity generated by wind, wave, tidal and solar power is often ill correlated to consumer demand and typically has to be fed into the National Grid where it is used instantly or must be expensively captured somehow, such as in a battery - which has issues with degradation - or else the turbines have to be shut off to ensure the generated electricity does not overload the electricity grid. That means it is difficult to balance the electricity being generated to the level of demand. In contrast, an electrolyser creates hydrogen that can be easily stored and physically transported as a gas with no deterioration, and then later fed into a fuel cell for conversion to power when needed. And unlike the burning of fossil fuels, the only by-product is oxygen and some water that are harmless to the environment."
Grant was only one of two for hydrogen production
Manchester Metropolitan University won a £100,000 grant from Engineering and Physical Sciences Research Council to pursue the research, one of only two successful projects in a funding stream reserved for developing materials for hydrogen production. The electrolyser cell casings will be 3D printed at the University's new digital training centre, PrintCity.
Forefront of 2D nanotechnology
Dr Rowley-Neale said: "We are at the forefront of 2D nanotechnology printing, building on previous research conducted here and elsewhere. We are taking the proof of concept one step further and making actual products with it."
The researchers are collaborating with the European Marine Energy Centre, the world-leading test and development centre for wave and tidal devices based on Orkney, Scotland, to research the capabilities and performance of the screen-printed electrolysers, the cells and the fuel cells.
There will be six months of electrode development at the University followed by installation of the electrolyser stack in Scotland and connection to a renewable energy system and then a further six months' testing.
Perfect opportunity explore less polluting alternatives
Dr Rowley-Neale said: "Isolated communities often need to be self-sufficient in terms of their energy generation but rely on expensive imported fuel due to often being geographically too isolated for a gas supply to be piped to them. This is the perfect opportunity to explore whether we can produce a less polluting alternative to current fossil fuel-based energy generation techniques. This will put Manchester Metropolitan at the forefront of renewable energy research as it helps to tackle climate change by enabling off-grid clean and cost effective hydrogen production."
Jon Clipsham, Hydrogen Development Manager at the European Marine Energy Centre (EMEC), said: "EMEC have been pioneering the development of hydrogen production from tidal technologies, and this project will help the team at Manchester Metropolitan University gain a significant understanding of how their technology works in real-life settings. We are really excited to be a part of this ground-breaking project."
Source and top image: Manchester Metropolitan University
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