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Open AccessArticle

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

1
Secure Energy Manufacturing, Savannah River National Laboratory, Aiken, SC 29808, USA
2
Analytical Development, Savannah River National Laboratory, Aiken, SC 29808, USA
3
Department of Chemistry and Biochemistry, College of Science and Math, California State University, Northridge, 18111 Nordhoff St., Northridge, CA 91334, USA
*
Authors to whom correspondence should be addressed.
Inorganics 2017, 5(4), 83; https://doi.org/10.3390/inorganics5040083
Received: 19 September 2017 / Revised: 21 November 2017 / Accepted: 21 November 2017 / Published: 23 November 2017
(This article belongs to the Special Issue Functional Materials Based on Metal Hydrides)
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. View Full-Text
Keywords: solid state electrolyte; LiBH4; aluminum anode; lithium ion battery solid state electrolyte; LiBH4; aluminum anode; lithium ion battery
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MDPI and ACS Style

Weeks, J.A.; Tinkey, S.C.; Ward, P.A.; Lascola, R.; Zidan, R.; Teprovich, J.A. Investigation of the Reversible Lithiation of an Oxide Free Aluminum Anode by a LiBH4 Solid State Electrolyte. Inorganics 2017, 5, 83.

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