Electrochemical Energy Storage for Renewable Sources and Grid Balancing || Foreword by Dr. Derek Pooley††Dr Derek Pooley, CBE FInstP, is now retired after some 15years working as an independent consultant on nuclear and other energy technologies, which followed some 35years working full-time in energy and materials technologies. His appointments included chief executive of the UK Atomic Energy Authority, chief scientist at the UK Department of Energy, chairman of (Radioactive) Waste Management Technology Ltd, chairman of the European Union Nuclear Scientific and Technical Committee, president of the British Nuclear Energy Society (now the UK Nuclear Institute), and member of the European Union's Advisory Group on Energy.