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Electric vehicles have not yet been promoted on a large scale. Part of the reason is that although they can meet the needs of daily people commuting to and from get off work, their batteries cannot sustain long-distance driving. Japanese company Sumitomo Electric has recently developed a new way to increase battery capacity - using porous aluminum alloy as anodes in lithium batteries to improve battery capacity. Using this method, the capacity of existing batteries can be increased by 150%-300%. This means that the driving range of electric vehicles can be expanded by 50%-200%. This new aluminum material not only has low density and low conductivity, but is also corrosion-resistant, making it very suitable for use in lithium batteries that are frequently charged and discharged. This battery has already begun small-scale production, and the company hopes that this patented technology can be widely promoted in the future.