cobalt , vanadium , copper and so on have a clue in their generic name : they are rare . Furthermore , these minerals are mostly found in countries with unstable or inimical political systems , and where mining practices do not always meet the basic human rights standards we would wish for . Electrochemical battery systems have been the technology of choice in most of the storage applications to date , a lot of research power goes into alternatives .
“ Siemens researchers and our joint projects with universities are particu
“ Hydrogen fuel cells generate electricity by combining hydrogen and oxygen . They are reliable and quiet , with no moving parts , have a small footprint , high energy density and release no emissions – when running on pure hydrogen , their only by-product is water ”
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— Carl Ennis , Head of Product and System Sales , Smart Infrastructure , Siemens
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