Open AccessSelf-Healing, Improved Efficiency Solid State Rechargeable Li/I2 Based Battery
Author(s) -
Chavis A. Stackhouse,
Alyson Abraham,
Shan Yan,
Lei Wang,
Nahian Sadique,
Gurcharan Singh,
Amy C. Marschilok,
Esther S. Takeuchi,
Kenneth J. Takeuchi
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/abd831
Subject(s) - faraday efficiency , electrolyte , materials science , battery (electricity) , lithium (medication) , electrochemistry , internal resistance , lithium metal , substrate (aquarium) , carbon fibers , chemical engineering , lithium battery , nanotechnology , carbon nanotube , electrode , composite material , ion , chemistry , power (physics) , endocrinology , oceanography , composite number , engineering , ionic bonding , medicine , physics , organic chemistry , geology , quantum mechanics
Solid state electrolytes are receiving significant interest due to the prospect of improved safety, however, addressing the incidence and consequence of internal short circuits remains an important issue. Herein, a battery based on a LiI-LiI(HPN) 2 solid state electrolyte demonstrated self-healing after internal shorting where the cells recovered and continued to cycle effectively. The functional rechargeable electrochemistry of the self-forming Li/I 2 -based battery was investigated through interfacial modification by inclusion of Li metal (at the negative interface), and/or fabricated carbon nanotube substrates at the positive interface. A cell design with lithium metal at the negative and a carbon substrate at the positive interface produced Coulombic efficiencies > 90% over 60 cycles. Finally, the beneficial effects of moderately elevated temperature were established where a 10°C temperature increase led to ~5X lower resistance.