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A Rechargeable Li‐CO 2 Battery with a Gel Polymer Electrolyte
Author(s) -
Li Chao,
Guo Ziyang,
Yang Bingchang,
Liu Yao,
Wang Yonggang,
Xia Yongyao
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201705017
Subject(s) - electrolyte , battery (electricity) , materials science , crystallinity , electrochemistry , chemical engineering , electrode , polymer , organic radical battery , current density , carbon nanotube , separator (oil production) , nanotechnology , chemistry , composite material , power (physics) , physics , quantum mechanics , engineering , thermodynamics
The utilization of CO 2 in Li‐CO 2 batteries is attracting extensive attention. However, the poor rechargeability and low applied current density have remained the Achilles’ heel of this energy device. The gel polymer electrolyte (GPE), which is composed of a polymer matrix filled with tetraglyme‐based liquid electrolyte, was used to fabricate a rechargeable Li‐CO 2 battery with a carbon nanotube‐based gas electrode. The discharge product of Li 2 CO 3 formed in the GPE‐based Li‐CO 2 battery exhibits a particle‐shaped morphology with poor crystallinity, which is different from the contiguous polymer‐like and crystalline discharge product in conventional Li‐CO 2 battery using a liquid electrolyte. Accordingly, the GPE‐based battery shows much improved electrochemical performance. The achieved cycle life (60 cycles) and rate capability (maximum applied current density of 500 mA g −1 ) are much higher than most of previous reports, which points a new way to develop high‐performance Li‐CO 2 batteries.