OSAKA -- Japan's Sumitomo Electric Industries plans to build a new battery plant in North America as the U.S. accelerates its shift to sustainable energy, Nikkei has learned. Sumitomo wants to produce large-capacity batteries called "redox flow cells" which are used to store electricity generated by wind turbines and other forms of renewable energy. The batteries are less prone to degradation than conventional lithium-ion batteries. Their battery life of up to 30 years is expected to be twice as long as that of lithium-ion batteries. The battery market in North America is expected to expand to 1.7 trillion yen ($12.9...