Electrolyte Formulations For Electrochemical Cells Containing A Silicon Electrode
US-2016240889-A1 · Aug 18, 2016 · US
Electrolyte formulations for electrochemical cells containing a silicon electrode
US10128537B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10128537-B2 |
| Application number | US-201615251755-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 30, 2016 |
| Priority date | Aug 30, 2016 |
| Publication date | Nov 13, 2018 |
| Grant date | Nov 13, 2018 |
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Abstract
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Additives to electrolytes that enable the formation of comparatively more robust SEI films on silicon anodes. The SEI films in these embodiments are seen to be more robust in part because the batteries containing these materials have higher coulombic efficiency and longer cycle life than comparable batteries without such additives. The additives preferably contain a nitrate group.
First claim
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The invention claimed is: 1. A rechargeable electrochemical cell comprising: an anode comprising silicon; a cathode comprising a lithium ion intercalating material, wherein discharge and recharge of the electrochemical cell is accomplished by intercalation and de-intercalation of lithium ions into and from the cathode; and a liquid electrolyte solution comprising an additive, wherein the additive is represented by the chemical structural formula: where X is an organic group; wherein the liquid electrolyte solution forms a solid-electrolyte interphase layer during an initial cycle of the electrochemical cell. 2. The electrochemical cell of claim 1 , further comprising a cathode having an active material represented by the chemical structural formula: LiNi x Mn y Co z O 2 (ii) where x+y+z=1. 3. The electrochemical cell of claim 1 , further comprising a cathode having an active material represented LiNi 0.33 Mn 0.33 Co 0.33 O 2 . 4. The electrochemical cell of claim 1 wherein the additive comprises tetramethyl ammonium nitrate. 5. The electrochemical cell of claim 1 wherein the organic group comprises a charged organic moiety. 6. The electrochemical cell of claim 1 wherein the additive comprises ammonium nitrate. 7. The electrochemical cell of claim 1 wherein the additive comprises an ammonium nitrate moiety with one lower alkyl substitution on the ammonium group. 8. The electrochemical cell of claim 1 wherein the additive comprises an ammonium nitrate moiety with two lower alkyl substitutions on the ammonium group. 9. The electrochemical cell of claim 1 wherein the additive comprises an ammonium nitrate moiety with three lower alkyl substitutions on the ammonium group. 10. The electrochemical cell of claim 1 wherein the additive comprises an ammonium nitrate moiety with four lower alkyl substitutions on the ammonium group.
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Classifications
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
Silicon or alloys based on silicon · CPC title
- H01M10/0567Primary
characterised by the additives · CPC title
characterised by the solvents · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
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- What does patent US10128537B2 cover?
- Additives to electrolytes that enable the formation of comparatively more robust SEI films on silicon anodes. The SEI films in these embodiments are seen to be more robust in part because the batteries containing these materials have higher coulombic efficiency and longer cycle life than comparable batteries without such additives. The additives preferably contain a nitrate group.
- Who is the assignee on this patent?
- Wildcat discovery technologies inc
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0567. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).