Toyota, which is ending a battery deal with US electric car leader Tesla, is concentrating on mass-producing a fuel-cell vehicle, along with smaller rival Honda. Nissan, by contrast, has bet the farm on all-electrics, unveiling its second model this month — despite weak sales of its flagship Leaf — and is pushing the technology in China, where officials are scrambling to contain an air pollution crisis. Nissan and Tesla… came out with very ambitious goals for the technology but had to backtrack, partly because demand… wasnt strong enough, said Stefan Bratzel, director of Germanys Center of Automotive Management. Daimler, Toyota and General Motors are the most advanced in fuel cells, but the problem is the high cost of the technology and necessary infrastructure. – Limited range, high prices – Analysts say very low or zero-emission vehicles will dominate the next phase of independent travel, with governments everywhere rolling out stricter emissions standards.