Decomposition Reaction of Lithium Bis(oxalato)borate in the Rechargeable Lithium-Oxygen Cell
- Decomposition Reaction of Lithium Bis(oxalato)borate in the Rechargeable Lithium-Oxygen Cell
- 오시형; Taeeun Yim; Ekaterina Pomerantseva; Linda F. Nazar
- Issue Date
- Electrochemical and solid-state letters
- VOL 14, NO 12, A185-A188
- In the Li-oxygen battery, the reactivity of superoxide radicals with the electrolyte system during discharge is known to be one of the
key parameters to determine the nature of discharge product. Here, we report that lithium bis(oxalato)borate, a common electrolyte
salt, is readily decomposed by superoxide radicals. The solid discharge product from cells using this electrolyte salt was identified
as lithium oxalate through ex-situ X-ray diffraction and infrared spectroscopic observations. The nucleophilic substitution reaction
at the boron centre by superoxide radicals, followed by a series of reduction and gas evolution reactions, are proposed to account for
the overall process which also has implications for other salts.
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