Positive electrode for lithium ion secondary battery, and lithium ion secondary battery using the same
US-2017331146-A1 · Nov 16, 2017 · US
Energy storage device and method for manufacturing same
US10748715B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10748715-B2 |
| Application number | US-201716095613-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 25, 2017 |
| Priority date | Apr 26, 2016 |
| Publication date | Aug 18, 2020 |
| Grant date | Aug 18, 2020 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
An energy storage device is provided in which a decrease in power caused by repetitive charge-discharge in a high-temperature environment is suppressed. In the present embodiment, an energy storage device and a method for manufacturing the energy storage device are provided, the energy storage device including an electrode which includes: an active material layer including a particulate active material; and a conductive layer layered on the active material layer and including a conduction aid. An average secondary particle diameter of the active material is 2.5 μm or more and 6.0 μm or less. A surface roughness Ra of the conductive layer on a side on the active material layer is 0.17 μm or more and 0.50 μm or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. An energy storage device, comprising: an electrode which includes: an active material layer including a particulate active material; and a conductive layer layered on the active material layer and including a conduction aid, wherein an average secondary particle diameter of the active material is 2.5 μm or more and 6.0 μm or less, wherein a surface roughness Ra of the conductive layer on a side on the active material layer is 0.17 μm or more and 0.50 μm or less, wherein a density of the active material layer is 1.6 g/cm 3 or more and 2.8 g/cm 3 or less, and wherein a mass per unit area of the conductive layer is 0.1 g/m 2 or more and 1.0 g/m 2 or less. 2. The energy storage device according to claim 1 , wherein the conductive layer includes the conduction aid in amount of 30% or more and 70% or less. 3. The energy storage device according to claim 1 , wherein a particle diameter of the conduction aid is 20 nm or more and 40 nm or less. 4. The energy storage device according to claim 1 , wherein the active material layer and the conductive layer contain a same solvent. 5. The energy storage device according to claim 1 , wherein the conductive layer contains hydroxyalkylchitosan. 6. A method for manufacturing an energy storage device, the method comprising: preparing an electrode by layering an active material layer including a particulate active material and a conductive layer including a conduction aid, wherein an average secondary particle diameter of the active material is 2.5 μm or more and 6.0 μm or less, wherein a surface roughness Ra of the conductive layer on a side on the active material layer is set at 0.17 μm or more and 0.50 μm or less, wherein a density of the active material layer is set at 1.6 g/cm 3 or more and 2.8 g/cm 3 or less, and wherein a mass per unit area of the conductive layer is 0.1 g/m 2 or more and 1.0 g/m 2 or less.
Assignees
Inventors
Classifications
Selection of materials · CPC title
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
Processes of manufacture · CPC title
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title
specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10748715B2 cover?
- An energy storage device is provided in which a decrease in power caused by repetitive charge-discharge in a high-temperature environment is suppressed. In the present embodiment, an energy storage device and a method for manufacturing the energy storage device are provided, the energy storage device including an electrode which includes: an active material layer including a particulate active …
- Who is the assignee on this patent?
- Gs Yuasa Int Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01G11/24. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 18 2020 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).