Nonaqueous electrolyte secondary battery
US-2019013508-A1 · Jan 10, 2019 · US
Positive electrode for lithium secondary battery and lithium secondary battery including same
US10868294B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10868294-B2 |
| Application number | US-201816481667-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 26, 2018 |
| Priority date | Jul 26, 2017 |
| Publication date | Dec 15, 2020 |
| Grant date | Dec 15, 2020 |
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- Title
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Abstract
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A positive electrode for a lithium secondary battery includes a positive electrode current collector, a positive electrode active material layer, and a primer layer formed between the positive electrode current collector and the positive electrode active material layer. The primer layer includes lithium carbonate (Li2CO3) particles having two or more different particle diameters, a binder polymer, and a conductive material. The lithium secondary battery attains the overcharge cutoff voltage rapidly by virtue of the gas generated between the positive electrode current collector and the positive electrode active material layer, in an overcharged state. Thus, it is possible to ensure the safety of the lithium secondary battery.
First claim
Opening claim text (preview).
What is claimed is: 1. A positive electrode for a lithium secondary battery, comprising: a positive electrode current collector; a positive electrode active material layer; and a primer layer formed between the positive electrode current collector and the positive electrode active material layer, wherein the primer layer comprises lithium carbonate (Li 2 CO 3 ) particles having two or more different particle diameters, a binder polymer, and a conductive material. 2. The positive electrode for a lithium secondary battery according claim 1 , wherein the lithium carbonate particles are present in an amount of 90 to 99.9 wt % based on the solid content in the primer layer. 3. The positive electrode for a lithium secondary battery according claim 1 , wherein the lithium carbonate particles comprise large lithium carbonate particles and small lithium carbonate particles. 4. The positive electrode for a lithium secondary battery according claim 3 , wherein the large lithium carbonate particles have a particle diameter of 3 to 15 μm, and the small lithium carbonate particles have a particle diameter equal to or greater than 0.1 μm and less than 3 μm. 5. The positive electrode for a lithium secondary battery according claim 3 , wherein the small lithium carbonate particles are present in an amount of 80 to 120 parts by weight based on 100 parts by weight of the large lithium carbonate particles. 6. The positive electrode for a lithium secondary battery according claim 1 , wherein the primer layer has a thickness of 3 to 15 μm. 7. The positive electrode for a lithium secondary battery according claim 1 , wherein the space formed among the lithium carbonate particles functions as pores in the primer layer. 8. The positive electrode for a lithium secondary battery according claim 1 , wherein the primer layer is porous. 9. A lithium secondary battery comprising the positive electrode for a lithium secondary battery according to claim 1 .
Assignees
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Classifications
Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title
in the form of layers, e.g. coatings · CPC title
Li-accumulators · CPC title
Energy storage using batteries · CPC title
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
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- What does patent US10868294B2 cover?
- A positive electrode for a lithium secondary battery includes a positive electrode current collector, a positive electrode active material layer, and a primer layer formed between the positive electrode current collector and the positive electrode active material layer. The primer layer includes lithium carbonate (Li2CO3) particles having two or more different particle diameters, a binder polym…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/131. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 15 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).