* EU's Oettinger says Germany must work with neighbours on energy * Needs to align green power reforms, grid expansion, research * Must avoid over reliance on Russia for raw materials By Vera Eckert and Christoph Steitz BERLIN, Jan 22 (Reuters) - Germany must turn away from its go-it-alone energy shift and work more with the European Union to build a cost-efficient, secure and sustainable sector, European Energy Commissioner Guenther Oettinger said on Tuesday.