Electrode for sodium molten-salt battery and sodium molten-salt battery
US-2015372308-A1 · Dec 24, 2015 · US
Lithium-sulfur secondary battery
US2016285135A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016285135-A1 |
| Application number | US-201415032830-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 15, 2014 |
| Priority date | Dec 3, 2013 |
| Publication date | Sep 29, 2016 |
| Grant date | — |
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Abstract
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Provided is a lithium-sulfur secondary battery capable of suppressing diffusion of a polysulfide eluted into an electrolyte, into a negative electrode and capable of suppressing lowering of a charge-discharge efficiency. In a lithium-sulfur secondary battery (B) of the invention, having a positive electrode (P) including a positive electrode active material containing sulfur, a negative electrode (N) including a negative electrode active material containing lithium, and a separator (5) which is disposed between the positive electrode and the negative electrode and which allows a lithium ion of an electrolyte (L) to pass therethrough, a cation-exchange membrane (CE) is formed on one of a positive electrode-side surface of the separator and a negative electrode-side surface thereof.
First claim
Opening claim text (preview).
1 . A lithium-sulfur secondary battery comprising: a positive electrode including a positive electrode active material containing sulfur; a negative electrode including a negative electrode active material containing lithium; and a separator which is disposed between the positive electrode and the negative electrode and which allows a lithium ion of an electrolyte to pass therethrough, characterized in that a cation-exchange membrane is formed on at least one of a positive electrode-side surface of the separator and a negative electrode-side surface of the separator. 2 . The lithium-sulfur secondary battery according to claim 1 , wherein the cation-exchange membrane is selected from a perfluorosulfonic acid polymer, an aromatic polyether polymer, and a hydrocarbon block copolymer containing a hydrophobic segment containing no sulfonic acid group and a hydrophilic segment containing a sulfonic acid group. 3 . The lithium-sulfur secondary battery according to claim 2 , wherein the hydrophobic segment is formed of a polyether sulfone or a polyether ketone, and the hydrophilic segment is formed of a sulfonated polyether sulfone or a sulfonated polyether ketone. 4 . The lithium-sulfur secondary battery according to claim 1 , wherein the positive electrode includes: a current collector; a plurality of carbon nanotubes which are grown on a surface of the current collector such that the current collector-surface side serves as a base end and so as to be oriented in a direction perpendicular to the surface of the current collector; and sulfur covering a surface of each of the carbon nanotubes. 5 . The lithium-sulfur secondary battery according to claim 2 , wherein the positive electrode includes: a current collector; a plurality of carbon nanotubes which are grown on a surface of the current collector such that the current collector-surface side serves as a base end and so as to be oriented in a direction perpendicular to the surface of the current collector; and sulfur covering a surface of each of the carbon nanotubes. 6 . The lithium-sulfur secondary battery according to claim 3 , wherein the positive electrode includes: a current collector; a plurality of carbon nanotubes which are grown on a surface of the current collector such that the current collector-surface side serves as a base end and so as to be oriented in a direction perpendicular to the surface of the current collector; and sulfur covering a surface of each of the carbon nanotubes. 7 . The lithium-sulfur secondary battery according to claim 2 , wherein the cation-exchange membrane is polytetrafluoroethylene perfluoro sulfonic acid.
Assignees
Inventors
Classifications
Electricity · mapped topic
Sulfides · CPC title
characterised by shape or form · CPC title
- H01M10/399Primary
Cells with molten salts · CPC title
containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title
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- What does patent US2016285135A1 cover?
- Provided is a lithium-sulfur secondary battery capable of suppressing diffusion of a polysulfide eluted into an electrolyte, into a negative electrode and capable of suppressing lowering of a charge-discharge efficiency. In a lithium-sulfur secondary battery (B) of the invention, having a positive electrode (P) including a positive electrode active material containing sulfur, a negative electro…
- Who is the assignee on this patent?
- Ulvac Inc
- What technology area does this patent fall under?
- Primary CPC classification H01M10/399. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Sep 29 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).