Back to Search Start Over

Investigation of the Reversible Lithiation of an Oxide Free Aluminum Anode by a LiBH4 Solid State Electrolyte

Authors :
Jason A. Weeks
Spencer C. Tinkey
Patrick A. Ward
Robert Lascola
Ragaiy Zidan
Joseph A. Teprovich
Source :
Inorganics, Vol 5, Iss 4, p 83 (2017)
Publication Year :
2017
Publisher :
MDPI AG, 2017.

Abstract

In this study, we analyze and compare the physical and electrochemical properties of an all solid-state cell utilizing LiBH4 as the electrolyte and aluminum as the active anode material. The system was characterized by galvanostatic lithiation/delithiation, cyclic voltammetry (CV), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Constant current cycling demonstrated that the aluminum anode can be reversibly lithiated over multiple cycles utilizing a solid-state electrolyte. An initial capacity of 895 mAh/g was observed and is close to the theoretical capacity of aluminum. Cyclic voltammetry of the cell was consistent with the constant current cycling data and showed that the reversible lithiation/delithiation of aluminum occurs at 0.32 V and 0.38 V (vs. Li+/Li) respectively. XRD of the aluminum anode in the initial and lithiated state clearly showed the formation of a LiAl (1:1) alloy. SEM-EDS was utilized to examine the morphological changes that occur within the electrode during cycling. This work is the first example of reversible lithiation of aluminum in a solid-state cell and further emphasizes the robust nature of the LiBH4 electrolyte. This demonstrates the possibility of utilizing other high capacity anode materials with a LiBH4 based solid electrolyte in all-solid-state batteries.

Details

Language :
English
ISSN :
23046740 and 14986299
Volume :
5
Issue :
4
Database :
Directory of Open Access Journals
Journal :
Inorganics
Publication Type :
Academic Journal
Accession number :
edsdoj.2ee2ba8af39f4e14986299cb3929befb
Document Type :
article
Full Text :
https://doi.org/10.3390/inorganics5040083