Hu, Yukun; Tewari, Anurag; Varga, Liz; Li, Hailong; Yan, Jinyue
(Elsevier, 2017-12-15)
Traditional energy storage systems have a common feature: the generating of secondary energy (e.g. electricity) and regenerating of stored energy (e.g. gravitational potential, and mechanical energy) are separate rather ...