Energy storage device and methods for making and use
US-2015364266-A1 · Dec 17, 2015 · US
Additive for positive electrode of electrochemical device, composition for positive electrode of electrochemical device, positive electrode for electrochemical device, and electrochemical device including same
US2023163305A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023163305-A1 |
| Application number | US-202117921650-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 28, 2021 |
| Priority date | Apr 30, 2020 |
| Publication date | May 25, 2023 |
| Grant date | — |
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Abstract
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The present invention relates to an additive for an electrochemical device positive electrode comprising a porous carbon material, wherein the porous carbon material has a pore volume of pores having a diameter of 2 nm or more of 0.25 cm 3 /g or more, a pore volume of pores having a diameter of less than 2 nm of 0.5 cm 3 /g or less, and an ash content of 0.5% by weight or less.
First claim
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1 . An additive for an electrochemical device positive electrode comprising a porous carbon material, wherein the porous carbon material has a pore volume of pores having a diameter of 2 nm or more of 0.25 cm 3 /g or more, a pore volume of pores having a diameter of less than 2 nm of 0.5 cm 3 /g or less, and an ash content of 0.5% by weight or less. 2 . The additive for an electrochemical device positive electrode according to claim 1 , wherein a specific surface area of the porous carbon material in accordance with a BET method is 300 to 1600 m 2 /g. 3 . The additive for an electrochemical device positive electrode according to claim 1 , wherein a powder resistivity of the porous carbon material is 0.60 Ω·cm or less. 4 . The additive for an electrochemical device positive electrode according to claim 1 , wherein an average particle diameter of the porous carbon material is 2 μm to 20 μm. 5 . A composition for an electrochemical device positive electrode comprising the additive for an electrochemical device positive electrode according to claim 1 and a positive electrode active material, wherein a content of the additive for an electrochemical device positive electrode is 10% by weight or less with respect to a total weight of the positive electrode active material. 6 . The composition for an electrochemical device positive electrode according to claim 5 , further comprising a binder in an amount of 0.5 to 10% by weight with respect to a total solid content weight of the composition for an electrochemical device positive electrode. 7 . The composition for an electrochemical device positive electrode according to claim 5 , further comprising a conductive material in an amount of 1 to 10% by weight with respect to a total solid content weight of the composition for an electrochemical device positive electrode. 8 . An electrochemical device comprising a positive electrode produced by using the composition for an electrochemical device positive electrode according to claim 5 . 9 . The electrochemical device according to claim 8 , wherein the electrochemical device operates from 2 V to 5 V. 10 . A lithium ion secondary battery comprising a positive electrode produced by using the composition for an electrochemical device positive electrode according to claim 5 .
Assignees
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Classifications
Carbon pastes or blends; Binders or additives therein · CPC title
Processes of manufacture · CPC title
- H01G11/42Primary
Powders or particles, e.g. composition thereof · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Carbon-based · CPC title
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Frequently asked questions
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- What does patent US2023163305A1 cover?
- The present invention relates to an additive for an electrochemical device positive electrode comprising a porous carbon material, wherein the porous carbon material has a pore volume of pores having a diameter of 2 nm or more of 0.25 cm 3 /g or more, a pore volume of pores having a diameter of less than 2 nm of 0.5 cm 3 /g or less, and an ash content of 0.5% by weight or less.
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification H01G11/42. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu May 25 2023 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).