Pacific Northwest National Laboratory
(PNNL), a US government facility, claims to have developed new batteries that have significantly enhanced storage compared with that of conventional vanadium redox units. In addition to boosting energy density, the new batteries can operate across a wider range of temperatures. These improvements are chiefly down to the addition of hydrochloric acid to the electrolyte, which is conventionally just sulphuric acid.
PNNL has licenced the technology to UniEnergy Technologies LLC, which is now developing the tax-payer-funded technology to create a commercially viable solution.