Characterization of N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide-based polymer electrolytes for high safety lithium batteries
Jae-Kwang Kim , Leszek Niedzicki , Johan Scheers , Cho-Rong Shin , Du-Hyun Lim , Władysław Wieczorek , Patrik Johansson , Jou-Hyeon Ahn , Aleksandar Matic , Per Jacobsson
AbstractPoly(vinylidene difluoride-co-hexafluoropropylene) (PVdF-HFP) membrane was prepared by electrospinning. The membranes served as host matrices for the preparation of ionic liquid-based polymer electrolytes (ILPEs) by activation with non-volatile, highly thermally stable, and safe room temperature ionic liquid (RTIL) electrolytes; N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide (Py14TFSI) complexed with 1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). In this work, the first combination of electrospun PVdF-HFP fiber polymer host and pyrrolidinium-based ionic electrolyte was employed for highly stable lithium batteries. The ILPE exhibited low Li+–TFSI coordination, low crystallinity, high thermal stability, high electrochemical stability, and high ionic conductivity with a maximum of 1.1 × 10−4 S cm−1 at 0 °C. The ILPE exhibited good compatibility with a LiFePO4 electrode on storage and good charge–discharge performance in Li/ILPE/LiFePO4 cells at room temperature, delivering specific capacities of 143 and 115 mA h g−1 at 0.1 and 1 C-rates. The ILPE also exhibited stable cycle properties and have therefore been demonstrated to be suitable for lithium battery applications.
|Journal series||Journal of Power Sources, ISSN 0378-7753|
|Publication size in sheets||0.5|
|Keywords in English||polymer electrolyte ; electrospinning ; N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide ; poly(vinylidene difluoride-cohexafluoropropylene) ; lithium batteries|
|ASJC Classification||; ; ;|
|Score|| = 40.0, 17-08-2020, ArticleFromJournal|
= 45.0, 17-08-2020, ArticleFromJournal
|Publication indicators||= 50; = 52; = 23.0; : 2013 = 2.111; : 2013 = 5.211 (2) - 2013=5.257 (5)|
|Citation count*||23 (2015-03-26)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.