Positive Electrode For Lithium Secondary Battery, Manufacturing Method Therefor, And Lithium Secondary Battery Comprising Same
Abstract:
The present invention relates to a positive electrode for a lithium secondary battery, a manufacturing method therefor, and a lithium secondary battery comprising the same, the positive electrode comprising a positive electrode mixture layer formed on a positive electrode current collector, wherein the positive electrode mixture layer comprises a positive electrode active material and a lithium ion additive, wherein the lithium ion additive is a lithium ion conductive ceramic material represented by chemical formula 1 below, and wherein the lithium ion conductive ceramic material has a structure in which lithium ions are additionally inserted into empty sites having a Na super ionic conductors-type (NASICON-type) structure. [Chemical formula 1] Li1+x1+y1M12-x1M2x1(PO4)3 wherein, M1 is at least one of Ti and Ge; M2 is at least one selected from the group consisting of Al, Cr, Ga, Fe, Sn, In, Lu, Y, and La; and 0
Specification
Mutual citations and related applications
[2]
This application claims the benefit of priority based on the July 10 2017 Korea Patent Application No. 10-2017-0087275, and all information disclosed in the literature of the Korea patent application are included as part of the specification.
[3]
[4]
Art
[5]
The present invention relates to a lithium secondary battery positive electrode, a method of manufacturing the same and a lithium secondary battery comprising the same.
[6]
BACKGROUND
[7]
Recently there is increasing cellular phones, laptop computers, electric vehicles, etc. along with the rapid spread of electronic appliances that use a battery small and light, yet relatively rapidly, the demand for high-capacity rechargeable battery. In particular, lithium secondary batteries are lightweight and have a high energy density, it has been spotlighted as a driving power source of the mobile device. Accordingly, research and development efforts have been actively carried out to improve the performance of lithium secondary batteries.
[8]
The lithium secondary battery is a microporous separator interposed between the positive electrode containing the positive electrode the intercalation / deintercalation of lithium ions available active material, a negative electrode, the positive electrode on which the intercalation / deintercalation of lithium ions include the possible negative electrode active material and the negative electrode It means a cell that contains the electrolyte containing a lithium ion to the assembly.
[9]
As a cathode active material of a lithium secondary battery is a lithium metal oxide is used, as an anode active material is used such as lithium metal, lithium alloy, a crystalline or amorphous carbon or carbon composites. After coated on the current collector to the active material to a suitable thickness and length, or the active material applied to its own into a film decrease with an insulator membrane to or laminate made of the electrode assembly into the next, can or similar container, injecting an electrolyte to prepare a secondary battery.
[10]
In order to develop high-capacity lithium secondary battery, it is important to improve the efficiency of the negative electrode. Although the non-reversible capacity of the material used as the irreversible additives much research in order to increase the cathode efficiency of such large silicon alloy series, most of the reversible charge and discharge occur in an operating voltage for the negatively affect the performance of the battery. Therefore, there is a need to develop a lithium ion supply materials as irreversible additive which does not contribute to charging and discharging.
[11]
Detailed Description of the Invention
SUMMARY
[12]
The present invention is to provide a lithium ion at an initial charging process and to provide the lithium secondary battery comprising charging and discharging is non-reversible including a new additive which does not contribute to a lithium secondary battery positive electrode and after it.
[13]
Problem solving means
[14]
The present invention provides a lithium ion-conducting ceramic material in which the positive electrode material mixture layer comprising a positive electrode material mixture layer formed on the positive electrode current collector includes a positive electrode active material and a lithium ion additive and the lithium ion additive is represented by the following general formula (1), the lithium-ion conductive ceramic material provides the tank top cone type (NASICON-type, Na super ionic conductors-type) empty site for a lithium secondary battery positive electrode having the lithium ions are additionally inserted into the structure (site) of the structure.
[15]
Formula 1
[16]
Li 1 + x1 y1 + M 1 2 x1- M 2 x1 (PO 4 ) 3
[17]
In formula 1, M 1 is at least one or more of Ti and Ge, M 2 is Al, Cr, Ga, Fe, Sn, In, Lu, Y , and is at least one member selected from the group consisting of La, 0
Documents
Application Documents
| # |
Name |
Date |
| 1 |
202017001183.pdf |
2020-01-10 |
| 2 |
202017001183-STATEMENT OF UNDERTAKING (FORM 3) [10-01-2020(online)].pdf |
2020-01-10 |
| 3 |
202017001183-POWER OF AUTHORITY [10-01-2020(online)].pdf |
2020-01-10 |
| 4 |
202017001183-FORM 1 [10-01-2020(online)].pdf |
2020-01-10 |
| 5 |
202017001183-DRAWINGS [10-01-2020(online)].pdf |
2020-01-10 |
| 6 |
202017001183-DECLARATION OF INVENTORSHIP (FORM 5) [10-01-2020(online)].pdf |
2020-01-10 |
| 7 |
202017001183-COMPLETE SPECIFICATION [10-01-2020(online)].pdf |
2020-01-10 |
| 8 |
202017001183-RELEVANT DOCUMENTS [13-01-2020(online)].pdf |
2020-01-13 |
| 9 |
202017001183-FORM 13 [13-01-2020(online)].pdf |
2020-01-13 |
| 10 |
abstract.jpg |
2020-01-21 |
| 11 |
202017001183-FORM-26 [25-02-2020(online)].pdf |
2020-02-25 |
| 12 |
202017001183-Power of Attorney-270220.pdf |
2021-10-19 |
| 13 |
202017001183-Correspondence-270220.pdf |
2021-10-19 |