By Christoph Steitz and Jan Schwartz FRANKFURT (Reuters) - Volkswagen wants electric vehicles to make up the majority of European sales for its core brand by 2030, it said on Friday, the latest carmaker to accelerate the shift towards battery-powered models. Fully electric vehicles are expected to account for more than 70% of its total European vehicle sales by 2030, compared with a previous target of 35%, the world's second-largest carmaker said as it unveiled its 'Accelerate' strategy