Nickel-hydrogen-based batteries that have long been used by NASA for its space missions are now making their way to power the grid. California-based EnerVenue is building large Energy Storage Vessels (ESVs) that could be used to power the grid using renewables, a press release said.
With the world making a major transition to renewables, energy storage solutions are the need of the hour. Lithium-ion batteries have been our best bet so far but making large-scale storage solutions is turning out quite expensive and cumbersome.
Li-ion batteries are prone to thermal runaway and large energy storage solutions need additional facilities for cooling, ventilation, and fire suppression to be built to prevent a major mishap. This is where nickel-hydrogen-based batteries could help.
How does a nickel-hydrogen battery work?
A nickel-hydrogen battery is much like any other battery with stacks of electrodes but held inside a pressurized gas tank. The cathode is made of nickel hydroxide, while the anode is hydrogen. When the battery is charged, the reaction produces hydrogen gas, which is oxidized during the discharging process to form water.
The energy-storing process, which involves the production of highly combustible hydrogen gas and a pressurized tank to contain it, raises doubts. However, the peak pressure inside the tank reaches only five percent of that in a hydrogen fuel cell. Moreover, if the pressure of the gas increases further, it results in the conversion of the gas into water again. READ MORE...
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