Organosilicon-based electrolytes for long-life lithium primary batteries
| DWPI Title: Lithium battery comprises anode containing lithium metal, cathode containing carbon monofluoride, separator between anode and cathode, and organosilicon-based electrolyte containing siloxane or silane backbone and anion binding agent ligand |
| Abstract: Organosilicon electrolytes exhibit several important properties for use in lithium carbon monofluoride batteries, including high conductivity/low viscosity and thermal/electrochemical stability. Conjugation of an anion binding agent to the siloxane backbone of an organosilicon electrolyte creates a bi-functional electrolyte. The bi-functionality of the electrolyte is due to the ability of the conjugated polyethylene oxide moieties of the siloxane backbone to solvate lithium and thus control the ionic conductivity within the electrolyte, and the anion binding agent to bind the fluoride anion and thus facilitate lithium fluoride dissolution and preserve the porous structure of the carbon monofluoride cathode. The ability to control both the electrolyte conductivity and the electrode morphology/properties simultaneously can improve lithium electrolyte operation. |
| Use: A lithium battery. |
| Advantage: The organosilicon-based electrolytes provide increased primary battery safety while offering electrochemical performance improvements. Inclusion of an anion binding agent ligand in the organosilicon electrolyte enables dissolution of the lithium fluoride salt directly, which not only increases the lithium ion concentration in the electrolyte (increased ionic conductivity), but also prevents the fouling of the cathode and effectively increases the carbon loading in the electrode, which in turn, increases electronic conductivity. The manufactured batteries have low salt loading, and in turn, higher stability and longer shelf life, for the initial battery start up while effectively scavenging highly stable lithium fluoride salt during discharge, yielding high performing and safer cells. |
| Novelty: A lithium battery comprises anode containing lithium metal, cathode containing carbon monofluoride, separator between anode and cathode, and organosilicon-based electrolyte for conducting lithium ions between anode and cathode, where electrolyte contains siloxane or silane backbone and anion binding agent ligand bonded to the siloxane or silane backbone. |
| Filed: 1/19/2017 |
| Application Number: US15409845A |
| Tech ID: SD 12924.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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