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A Guide to Water Free Lithium Bis(oxalate) Borate (LiBOB)

preprint
submitted on 01.02.2021, 21:25 and posted on 03.02.2021, 05:52 by Ceren Zor, Yaprak Subaşı, Durata Haciu, Mehmet Somer, Semih Afyon
The use of LiBOB is limited due to slight instability issues under ambient conditions that might require extra purification steps and might result in poorer performances in real systems. Here, we address some of these issues and report the high purity water free LiBOB synthesized with fewer processing steps employing lithium carbonate, oxalic acid, and boric acid as low-cost starting materials, and via ceramic processing methods under protective atmosphere. The physical and chemical characterizations of both anhydrous and monohydrate phases are performed with X-ray powder diffraction (XRPD), Fourier-transform infra-red spectroscopy (FTIR), Raman spectroscopy and scanning electron microscopy (SEM) analyses to determine the degree of the purity and the formation of impurities like LiBOB.H2O, HBO2 and Li2C2O4 as a result of the aging investigations performed. Differential thermal analysis (DTA) is applied to determine the optimum synthesis conditions for anhydrous LiBOB and to analyze the water loss and the decomposition of LiBOB.H2O. Aging experiments with the water free LiBOB are carried out to evaluate the effect of humidity in the phase changes and resulting impurities under various conditions. The detrimental effect of even slightest humidity conditions is shown, and protective measures during and after the synthesis of LiBOB are discussed.

Funding

National Boron Research Institute (BOREN), (No. 2018-31-07-15-003)

History

Email Address of Submitting Author

safyon@gtu.edu.tr

Institution

Gebze Technical University

Country

Turkey

ORCID For Submitting Author

0000-0002-0153-7446

Declaration of Conflict of Interest

There are no conflicts to declare.

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