Exploiting a hybrid lithium ion power source with a high energy density over 30 Wh/kg

By Jin, Liming; Zheng, Junsheng; Wu, Qiang; Shellikeri, Annadanesh; Yturriaga, Steven; Gong, Ruiqi; Huang, Jun; Zheng, Jim P.
Published in Materials Today Energy 2018

Abstract

Lithium ion capacitor (LIC) with high energy density, high power density, as well as long cycle life, is considered as one of the most promising energy storage and conversion system. However, in practical level, the energy density of LIC can hardly breakthrough 20 Wh kg?1full cell, which largely limits its applications. Hence, in this study, a new type of hybrid lithium ion power source (hLIPS), which is fabricated using lithium iron phosphate (LFP)/activated carbon (AC) composite cathode and Li doped hard carbon (HC) anode, and characterized in Li-containing organic electrolyte, is proposed to further enhance the energy density of LIC. Based on this design, a prototype pouch cell with a capacity of 300 F at 1 C has been produced. Operating in a range of 2.2

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