1. Larcher, D. & Tarascon, J. M. Towards greener and more sustainable batteries for electrical energy storage. Nat. Chem. 7, 19–29 (2015).
2. US Energy Information Administration. Annual Energy Outlook (2016);
http://go.nature.com/2gh0oZl
3. Pillot, C. Avicenne Energy Analysis (April 2016).
4. Ishihara, K., Kihira, N., Terada, N., Iwahori, T. & Nishimura, K. Life cycle analysis of large-size lithium-ion secondary batteries developed in the Japanese national project. In Proceedings from 5th Ecobalance Conference, 293–294 (2002).
5. Straubel, J. B. Energy storage, EV's and the grid. EIA Conf., Washington DC, 15 June 2015;
http://go.nature.com/2gDNTcR