To build a modern-day electrical grid with the flexibility and resilience to handle ebbing and flowing energy sources like solar and wind power, West Virginia University engineers have designed and successfully tested a fuel cell that can switch between storing or making electricity and also generate hydrogen from water.
When used as an energy storage device, the fuel cell is combined with a fuel generation device, commonly an electrolyzer, to create a Regenerative Fuel Cell (RFC) system, which can convert electrical energy to a storable fuel and then use this fuel in a fuel cell reaction to provide electricity when needed.
How do fuel cells work?
Fuel cells are electrochemical devices that convert chemical energy into electrical energy through a controlled redox reaction. They are distinct from batteries in that they require a continuous supply of fuel and oxidant (usually oxygen) to operate, while batteries store their energy internally.
So, if you want to maximize the purpose of a solar energy system, then you would need a form of solar storage to store the excess energy produced by the solar array, thus allowing you to use that stored energy during night-time or during power outages. I. What Is a Fuel Cell? II. How Can Fuel Cells Help Fix the Renewable Energy Storage Problem?
Hydrogen fuel cells have short lifespans and need to be replaced often. These devices are not a perfect solution to energy storage, as they are bulky and heavy and have limited storage capacity. Hydrogen fuel cells could have an environmental impact if produced with too much energy.
What is a fuel cell based energy storage system?
A fuel cell-based energy storage system allows separation of power conversion and energy storage functions enabling each function to be individually optimized for performance, cost or other installation factors. This ability to separately optimize each element of an energy storage system can provide significant benefits for many applications.
Is a fuel cell like a battery?
In a way, it is very much like a battery because it can produce electricity while being recharged at the same time. Moreover, even though fuel cells are similar to batteries in that they convert chemical energy into electrical energy, they also have their own differences.