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US 11,769,905 B2Granted
Poly(alkylene oxide) siloxane-based electrolytes for rechargeable batteries
AssigneeUchicago Argonne, LLC
InventorsGui-Liang Xu, Jianzhao Liu, Zonghai Chen, Khalil Amine
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Abstract
An electrochemical device includes a cathode including elemental selenium, elemental sulfur, or selenium-sulfur containing composite; a negative electrode; a separator; and an electrolyte including a poly(alkyleneoxide) siloxane; and a salt; wherein a concentration of the salt in the electrolyte is sufficient to minimize dissolution of polysulfides/polyselenides formed during cycling of the device.
Claims20
An electrochemical device comprising:
- a cathode comprising elemental selenium, elemental sulfur, or a selenium-sulfur composite of formula SxSey, wherein 0.1<x/y<50;
- a negative electrode;
- a separator;
- and
- an electrolyte comprising:
- a poly(alkyleneoxide) siloxane;
- and
- a salt;
- wherein:
- a concentration of the salt in the electrolyte is from greater than 2 M to 10 M, and the molarity is determined as moles of salt divided by the volume of the electrolyte, without considering the volume change of the electrolyte composition due to dissolution of the salt and is sufficient to prevent or suppress dissolution of polysulfides/polyselenides formed during cycling of the device.
7 more elements
Dependencies are inferred from the claim text.