Passivating agents for electrochemical cells
AssigneeSion Power Corporation
InventorsZhaohui Liao, Chariclea Scordilis-Kelley, Tracy Earl Kelley, Yuriy V. Mikhaylik, Holger Schneider
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Abstract
Articles and methods involving electrochemical cells and/or electrochemical cell preproducts comprising passivating agents are generally provided. In certain embodiments, an electrochemical cell includes first and second passivating agents. In some embodiments, an electrochemical cell may include a first electrode comprising a first surface, a second electrode (e.g., a counter electrode with respect to the first electrode) comprising a second surface, a first passivating agent configured and arranged to passivate the first surface, and a second passivating agent configured and arranged to passivate the second surface.
Claims16
An electrochemical cell, comprising:
- a first electrode comprising lithium metal;
- a protective layer disposed on the first electrode, wherein the protective layer is electrically insulating and comprises one or more glasses, ceramics, and/or glassy-ceramics;
- a second electrode;
- a separator;
- an electrolyte;
- a first passivating agent, wherein the first passivating agent comprises a sultone;
- a second passivating agent, wherein the second passivating agent comprises a species capable of undergoing polymerization and is present in an amount of greater than or equal to 15 wt % versus the total weight of the electrolyte;
- and
- wherein the species capable of undergoing polymerization lacks a vinyl group but is capable of developing a vinyl group upon electrochemical cell cycling, wherein the species lacking the vinyl group is a fluoroalkyl carbonate.
An electrochemical cell, comprising:
- a first electrode comprising lithium metal;
- a protective layer disposed on the first electrode, wherein the protective layer is electrically insulating and comprises one or more glasses, ceramics, and/or glassy-ceramics;
- a second electrode;
- a separator;
- an electrolyte containing LiN(SO2F)2;
- a first passivating agent, wherein the first passivating agent comprises a sultone;
- and
- a second passivating agent comprising fluoroethylene carbonate.
An electrochemical cell, comprising:
- a first electrode comprising lithium metal;
- a protective layer disposed on the first electrode, wherein the protective layer is electrically insulating and comprises one or more glasses, ceramics, and/or glassy-ceramics;
- a second electrode;
- a separator;
- an electrolyte containing LiBF4;
- a first passivating agent, wherein the first passivating agent comprises a sultone;
- and
- a second passivating agent comprising fluoroethylene carbonate present in an amount of greater than or equal to 15 wt % versus the total weight of the electrolyte.
Dependencies are inferred from the claim text.