Positive electrode active material, method for manufacturing positive electrode active material, lithium secondary battery, and method for manufacturing lithium secondary battery
A cathode active material, lithium secondary battery technology, applied in the direction of active material electrode, secondary battery, electrode manufacturing, etc., can solve the problem of lithium secondary battery output characteristics decline, hinder the surface electron conduction path of active material, lithium ion entering and get rid of difficulties
Inactive Publication Date: 2010-08-18
TOYOTA JIDOSHA KK
View PDF1 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the fluorine treatment hinders the electron conduction path in the surface of the active material, and thus deteriorates the electron conductivity
Due to this, the internal resistance of the battery becomes high, and the entry and exit of lithium ions in the positive electrode becomes difficult during discharge, or the movement of lithium ions becomes difficult, thereby bringing about a problem that the output characteristics of the lithium secondary battery are reduced.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] Examples of the cathode active material, method for manufacturing the cathode active material, and lithium secondary battery of the present invention will be described below.
[0028] First, a method for producing a cathode active material will be described. In the method for manufacturing a positive electrode active material according to an embodiment of the present invention, the positive electrode active material is subjected to fluorine treatment to form a fluorine-based coating film on the surface of the positive electrode active material. Thereafter, the fluorine-based coating film was fired in an oxygen atmosphere, thereby forming a fluorine-oxygen-containing active material layer containing fluorine and oxygen on the surface of the positive electrode active material.
[0029] According to this embodiment of the present invention, the fluorine in the fluorine-oxygen active material layer coated on the surface of the positive electrode active material containing a...
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
Login to View More Abstract
A method for manufacturing positive electrode active material includes: forming a fluorine-based coat film on a surface of a positive electrode active material by subjecting the positive electrode active material to a fluorine treatment; and forming a fluorine-oxygen-containing active material layer that contains fluorine and oxygen on the surface of the positive electrode active material by firing the fluorine-based coat film under an oxygen atmosphere.
Description
technical field [0001] The present invention relates to a positive electrode active material (material), a method for manufacturing the positive electrode active material, a lithium secondary battery and a method for manufacturing the lithium secondary battery. Background technique [0002] Along with the miniaturization trend of personal computers, video cameras, portable phones, etc., the fields of information-related appliances and communication appliances have seen practical and widespread use of lithium secondary batteries as energy sources for these appliances because of the energy density of lithium secondary batteries high. Also, in the field of motor vehicles, research and development of electric vehicles has been promoted due to environmental issues and resource issues. Lithium secondary batteries are also considered as an energy source for electric vehicles. [0003] However, currently commercial lithium secondary batteries use an organic electrolyte solution in...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C01G53/04H01M4/58H01M4/02H01M4/36H01M4/04H01M10/40H01M4/52
CPCY02E60/122H01M4/582H01M4/525H01M4/0402H01M4/0471H01M10/052H01M4/366H01M4/131H01M4/1315H01M4/1391Y02E60/10
Inventor 山村英行
Owner TOYOTA JIDOSHA KK