Quaternary positive electrode material, positive electrode and battery
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A positive electrode material and positive electrode technology, applied in the field of batteries, can solve the problem that the quaternary positive electrode material needs to be improved, and achieve the effects of improving intrinsic electronic conductivity, improving structural stability and long cycle life
Active Publication Date: 2020-07-21
SVOLT ENERGY TECHNOLOGY CO LTD
View PDF3 Cites 15 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] However, the current quaternary cathode materials, cathodes, and batteries still need to be improved
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] Embodiment 1, preparation quaternary cathode material A
[0036] (1) The high nickel precursor Ni 0.88 co 0.06 mn 0.03 Al 0.03 (OH) 2 , Li source (LiOH) and Zr source (Zr(OH) 4 ) are mixed to form a mixture; and calcined, cooled, pulverized, and sieved to obtain a Zr-doped quaternary positive electrode material matrix; in the Zr-doped quaternary positive electrode material matrix, the mass fraction of Zr is 3000ppm;
[0037] (2) Al source (Al 2 o 3 ) coating and boron source (H 3 BO 3 ) coating, and after calcination treatment, etc., to obtain the final quaternary cathode material A.
Embodiment 2
[0038] Embodiment 2, preparation quaternary cathode material B
[0039] (1) The high nickel precursor Ni 0.88 co 0.06 mn 0.03 Al 0.03 (OH) 2 , Li source (LiOH) and Al source (Al 2 o 3 ) are mixed to form a mixture; and calcined, cooled, pulverized, and sieved to obtain an Al-doped quaternary positive electrode material matrix; in the Al-doped quaternary positive electrode material matrix, the mass fraction of Al is 3000ppm;
[0040] (2) Al source (Al 2 o 3 ) coating and boron source (H 3 BO 3 ) coating, and after calcination treatment, etc., to obtain the final quaternary cathode material B.
Embodiment 3
[0041] Embodiment 3, preparation quaternary cathode material C
[0042] (1) The high nickel precursor Ni 0.88 co 0.06 mn 0.03 Al 0.03 (OH) 2 , Li source (LiOH), Al source (Al 2 o 3 ) and Zr source (Zr(OH) 4 ) are mixed to form a mixture; and calcined, cooled, pulverized, and sieved to obtain a quaternary positive electrode material matrix co-doped with Al and Zr; in the quaternary positive electrode material matrix co-doped with Al and Zr, the mass of Al The fraction is 3000ppm, and the mass fraction of Zr is 1500ppm;
[0043] (2) Al source (Al 2 o 3 ) coating and boron source (H 3 BO 3 ) coating, and after calcination treatment, etc., to obtain the final quaternary cathode material C.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
quality score
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a quaternary positive electrode material, a positive electrode and a battery. Specifically, the invention provides a quaternary positive electrode material. The chemical structural general formula of the quaternary positive electrode material is shown in the specification, wherein x is larger than or equal to 1 and smaller than or equal to 1.05, y is larger than 0 and smaller than or equal to 0.025, a is larger than or equal to 0.3 and smaller than or equal to 0.95, b is larger than or equal to 0.03 and smaller than or equal to 0.1, c is larger than or equal to 0.01 andsmaller than or equal to 0.05, d is larger than or equal to 0.01 and smaller than or equal to 0.05, and a+b+c+d=1; M is a doping agent and comprises one or more of Zr, Al, B, Ti, Mg, Nb, Ba, Si, P, W, Sr and F; the quaternary positive electrode material has an [alpha]-NaFeO2 type crystal structure, the space group of an X-ray diffraction pattern of the quaternary positive electrode material is R-3m, and the relationship between the cell parameter c of the c axis and the cell parameter a of the a axis meets the condition that c / a is greater than 4.943. Therefore, the dopant can better improvethe structural stability of the quaternary positive electrode material, and the quaternary positive electrode material has a better layered crystal structure, so that the cycling stability and the thermal stability of a battery using the quaternary positive electrode material can be improved, the battery specific capacity of the battery is improved, and the cycle life of the battery is prolonged.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular, to quaternary cathode materials, cathodes, and batteries. Background technique [0002] At present, lithium-ion batteries are widely used in cameras, mobile phones, notebook computers, electric vehicles and other equipment due to their advantages such as stable voltage, high specific capacity, high energy density, long cycle life, and environmental friendliness. Among them, the key factor that determines its performance is the positive electrode material of lithium-ion batteries. In high-energy lithium-ion secondary batteries, the cathode materials used include spinel-structured LiMn 2 o 4 , layered LiCoO 2 and LiNiO 2 Wait. Among them, the layered LiNiO 2 Lithium-ion secondary batteries as cathode materials have attracted much attention due to their high charge-discharge specific capacity. However, LiNiO 2 In the process of repeated delithiation (that is, repeated chargi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more