Journal
ACS ENERGY LETTERS
Volume 6, Issue 4, Pages 1315-1323Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.0c02559
Keywords
-
Categories
Funding
- Laboratory Directed Research and Development (LDRD) program [1006525]
- Laboratory Directed Research and Development (LDRD) from Argonne National Laboratory by the Office of Science, of the U.S. Department of Energy [DEAC0206CH11357]
Ask authors/readers for more resources
This study presents a hybrid electrolyte with single-ion conductivity, combining polymer with ceramic electrolytes, showing high Li transference number and good electrochemical stability. Compared to traditional electrolytes, this hybrid electrolyte exhibits high Coulombic efficiencies in lithium-ion batteries.
Considering the high energy consumption during processing, and the low compliance and adhesion of ceramic electrolytes, the integration of polymer into ceramic electrolytes provides a way to mitigate the interfacial issues. However, the severe ion concentration gradient, low ionic conductivity, and instability toward Li metal and high-voltage cathodes become the major concerns in applying hybrid electrolytes. In this work, we report a single-ionconducting hybrid electrolyte (SIE-LLZO) with 64 wt % Li7La3Zr2O12(LLZO) particles embedded in a fluoroboron-centered Li-conductive polymer framework (LiBFSIE). The SIE-LLZO electrolyte exhibited a high Li transference number of 0.94 and electrochemical stability up to 5.6 V vs Li/Li+. Promising averaged Coulombic efficiencies of 99.97% and 99.91% were achieved in cells with LiNi0.8Co0.15Al0.05O2 and LiNi0.6Mn0.2Co0.2O2 cathodes for 400 and 200 cycles, respectively. The Li-conducting pathway in the hybrid electrolyte was further investigated by a Li-6-to-Li-7 isotope replacement method, indicating that Li transport mainly relies on the LLZO and interface between LiBFSIE and LLZO.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available