More from FT about batteries.29 Oct 2023 11:07
Chan¬ging the elec¬tro¬lyte on its own would not neces¬sar¬ily res¬ult in a stepchange in bat¬tery per¬form¬ance. The real excite¬ment hinges on a tech¬no¬lo¬gical devel¬op¬ment that it would enable: lith¬ium metal anodes. Repla¬cing the graph¬ite that is used in cur¬rent anodes would help double the bat¬tery’s range, in part because it would be lighter.
Toyota’s engin¬eers have also claimed advances here. The group is now increas¬ingly con¬fid¬ent that it can stack the cells at the same rate as cur¬rent lith¬ium-ion bat¬ter¬ies. Yet other tech¬nical hurdles need to be cleared to achieve full-scale mass pro¬duc¬tion. “We still need a break¬through in terms of ensur¬ing the volume and qual¬ity of the bat-tery mater¬i¬als,” one of its engin¬eers said dur¬ing a plant tour last month.
Akitoshi Hay¬ashi, a pro¬fessor at Osaka Met¬ro¬pol¬itan Uni¬versity, says it will be “extremely chal¬len¬ging” to masspro¬duce solid-state bat¬ter-ies to the same qual¬ity as cur¬rent lith¬ium-ion bat¬ter¬ies, but if achieved, the tech¬no¬logy will be “glob¬ally unbeat¬able”. He adds: “Solid-state bat¬ter¬ies will be key to the revival of Japan¬ese car¬makers, who are behind in EV strategy, and for Japan.”
Akitoshi Hay¬ashi, a pro¬fessor at Osaka Met¬ro¬pol¬itan Uni¬versity, says it will be “extremely chal¬len¬ging” to masspro¬duce solid-state bat¬ter-ies to the same qual¬ity as cur¬rent lith¬ium-ion bat¬ter¬ies, but if achieved, the tech¬no¬logy will be “glob¬ally unbeat¬able”. He adds: “Solid-state bat¬ter¬ies will be key to the revival of Japan¬ese car¬makers, who are behind in EV strategy, and for Japan.”
Eco¬nom¬ies of scale will help reduce costs. But the per¬form¬ance and cost of cur¬rent lith¬ium-ion bat¬ter¬ies are also improv¬ing con¬stantly, as other tech¬no¬lo¬gies such as sil¬icon anodes make advances. Solid-state bat¬ter¬ies’ extreme sens¬it¬iv¬ity to mois¬ture and oxy¬gen could keep man¬u¬fac¬tur¬ing costs high, while their com¬plex¬ity could require expens¬ive redesigns of EVs.