Non-Aqueous Electrolytic Solutions and Electrochemical Cells Comprising the Same
US-2016301105-A1 · Oct 13, 2016 · US
Non-aqueous electrolyte electricity-storage element
US10490846B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10490846-B2 |
| Application number | US-201715683908-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 23, 2017 |
| Priority date | Mar 11, 2015 |
| Publication date | Nov 26, 2019 |
| Grant date | Nov 26, 2019 |
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Abstract
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To provide a non-aqueous electrolyte electricity-storage element including a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material capable of inserting and releasing cations, and a non-aqueous electrolyte, wherein the positive-electrode active material is porous carbon having pores having a three-dimensional network structure, and wherein a changing rate of a cross-sectional thickness of a positive electrode film including the positive-electrode active material defined by Formula (1) below is less than 45%.
First claim
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What is claimed is: 1. A non-aqueous electrolyte electricity-storage element comprising: a positive electrode comprising a positive electrode film which comprises a positive-electrode active material capable of inserting and releasing anions; a negative electrode comprising a negative-electrode active material capable of inserting and releasing cations; and a non-aqueous electrolyte, wherein the positive-electrode active material comprises porous carbon having connecting mesopores which have a three-dimensional network structure, and wherein a changing rate of a cross-sectional thickness of the positive electrode film defined by Formula (1) is less than 45%: Changing rate of cross - sectional thickness ( % ) = Film thickness after charge - discharge - Film thickness before charge - discharge Film thickness before charge - discharge × 100 , Formula ( 1 ) wherein the charge-discharge in the Formula (1) is 50 cycles charge-discharge where charge is performed with cut-off voltage of 4.5V and discharge is performed with cut-off voltage of 1.5V. 2. The non-aqueous electrolyte electricity-storage element according to claim 1 , wherein the changing rate of the cross-sectional thickness is 20% or less. 3. The non-aqueous electrolyte electricity-storage element according to claim 1 , wherein a discharge capacity of the non-aqueous electrolyte electricity-storage element under charge-discharge conditions of the non-aqueous electrolyte electricity-storage element is 50 mAh/g or greater but 140 mAh/g or less. 4. The non-aqueous electrolyte electricity-storage element according to claim 1 , wherein a BET specific surface area of the porous carbon is 50 m 2 /g or greater but 2,000 m 2 /g or less, and a pore volume of the porous carbon is 0.2 mL/g or greater but 2.3 mL/g or less. 5. The non-aqueous electrolyte electricity-storage element according to claim 1 , wherein the non-aqueous electrolyte is formed by dissolving a lithium salt in a non-aqueous solvent. 6. The non-aqueous electrolyte electricity-storage element according to claim 5 , wherein the non-aqueous solvent is at least one selected from the group consisting of dimethyl carbonate (DMC), ethylene carbonate (EC), and fluoroethylene carbonate (FEC). 7. The non-aqueous electrolyte electricity-storage element according to claim 5 , wherein the lithium salt is LiPF 6 .
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Classifications
characterised by the solvent · CPC title
specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation · CPC title
with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC] · CPC title
Carbon-based · CPC title
characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title
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- What does patent US10490846B2 cover?
- To provide a non-aqueous electrolyte electricity-storage element including a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material capable of inserting and releasing cations, and a non-aqueous electrolyte, wherein the positive-electrode active material is porous carbon havi…
- Who is the assignee on this patent?
- Abe Naoto, Itoh Yoshio, Dan Tatsuya, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification H01G11/04. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 26 2019 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).