A High‐Rate and Long‐Life Rechargeable Battery Operated at −75 oC. Issue 10 (7th July 2020)

• Record Type: Journal Article
• Authors: Dong, Xiaoli; Yang, Yang; Li, Panlong; Fang, Zhong; Wang, Yonggang; Xia, Yongyao
• Is Part Of: Batteries & supercaps. Volume 3:Issue 10(2020)
• Page Start: 1016
• Page End: 1020
• Publication Date: 2020-07-07
• Subjects: ultra-low temperature of −75 °C -- rechargeable battery -- high rate -- long life -- intercalation pseudocapacitive behavior; Electrochemistry -- Periodicals; Electrodes -- Periodicals; Electric batteries -- Periodicals; 621.31242
• DOI: 10.1002/batt.202000117
• Languages: English
• ISSNs: 2566-6223

Abstract

Abstract: Intercalation compounds are commonly‐used electrodes for commercialized lithium ion batteries (LIBs), while suffering from the sluggish interfacial processes at subzero temperature. Herein, nanoscale Nb2 O5 has been investigated as a viable cathode for rechargeable batteries operated at the temperature of as low as −75 °C. Benefitting from the surface‐controlled charge storage process, the intrinsic intercalation pseudocapacitance of Nb2 O5 broke the rate limitation at low temperature. Particularly, the battery exhibited outstanding rate performance (100 C) at room temperature and delivered high a reversible charge/discharge with a high capacity of 121 mAh g −1 at −75 °C. Furthermore, a capacity retention of 50 % and a long life for 100 cycles without capacity fading were achieved with a rate of 0.5 C at such low temperature. Based on the outstanding electrochemical performance from −75 °C to +25 °C, it can be envisaged that materials with intercalation pseudocapacitive behavior could be served as good candidate for energy storage systems under extreme conditions. Abstract : As good as cold : A rechargeable battery based on Nb2 O5 cathode and metallic lithium anode was fabricated, delivering a high rate (up to 5 C) and a long cycle life (100 cycles) at the ultra‐low temperature of −75 °C, which can be attributed to the fast ion transport and low activation energy driven by the surface‐controlled intercalation pseudocapacitive feature of Nb2 O5 cathode.