Miscibility Gap Alloys (MGA) are newly developed thermal batteries or thermal energy storage media which have the potential to revolutionise thermal storage for electricity generation, by providing a cost effective means of stable long-term energy storage.

The alloys comprise of a patented inverse microstructure of two or more immiscible components (the two components do not mix or react, similar to oil and water). The resulting structure exhibits the high energy storage capacity of a phase change system while macroscopically behaving as a continuously solid modular block. I.e. it is effectively a solid even when fully charged and one of the components is fully molten. This means that there is no containment issues which usually exist when trying to store high temperature molten materials. This makes our technology much safer, and cheaper.

Our vision is to develop this thermal energy storage media to allow high-efficiency electricity generation from stored solar energy.

Miscibility gap alloy technology is also very promising in the field of waste heat recovery and storage, not just solar heat, but any heat produced by an industrial, or other, process. Depending on the amount and supply temperature of the waste heat stored in a MGA system, this heat could be used to generate electricity, drive an industrial process requiring heat, or simply used for building heating and cooling.