Facile Modification of LiAlCl4 Electrolytes for Mg-Li Hybrid Batteries by the Conditioning-Free Method

Title
Facile Modification of LiAlCl4 Electrolytes for Mg-Li Hybrid Batteries by the Conditioning-Free Method
Authors
이재균하정훈오진우이수빈조재현김광범이관영
Keywords
Facile Modification of LiAlCl4 Electrolytes.; Mg-Li Hybrid Batteries.; exhibiting excellent rate capability and cyclabili; X-ray diffraction (XRD)
Issue Date
2020-11
Publisher
The Journal of Physical Chemistry C
Citation
VOL 124, NO 47-25747
Abstract
Lithium aluminum chloride complexes (LACCs) are excellent electrolyte candidates for Mg?Li hybrid batteries (MgHBs) because they can simultaneously conduct electrochemical reactions both at Mg anodes and Li+-insertion cathodes. However, to ensure compatibility with Mg anodes, LACCs must first undergo a cumbersome conditioning process; this severely lowers their productivity and limits any improvement in the electrolyte performance. To resolve this issue, we employed a conditioning-free process for the facile modification of LACCs. The conditioning-free process was conducted by reacting LACCs and metallic Mg powder with a small amount of CrCl3 that promotes the rapid and high-degree substitution of oxidation states between anionic Al3+ complexes and Mg. The newly generated Mg2+ ions in the conditioning-free LACC (cf-LACC) reached a high concentration of up to 1.2 M and formed anionic complexes that function as charge carriers for Mg anodes. Moreover, the cf-LACC electrolyte successfully demonstrated its applicability to the MgHB system, which used a high voltage cathode material LiFePO4, by exhibiting excellent rate capability and cyclability.
URI
http://pubs.kist.re.kr/handle/201004/72392
ISSN
1932-7447
Appears in Collections:
KIST Publication > Article
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