Lithium ion battery cathode and application thereof
A lithium-ion battery and negative electrode technology, applied in battery electrodes, secondary batteries, electrode carriers/collectors, etc., can solve problems such as complex methods, difficult large-scale promotion and application, and achieve improved cycle performance and simple and easy preparation methods Operation, good touch effect
Inactive Publication Date: 2018-07-24
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, these research methods are relatively complicated and difficult to promote and apply on a large scale.
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 1
[0069] A lithium ion battery negative pole, its preparation method comprises the steps: get 2g nano-silicon, 0.5g expanded graphite, the multi-walled carbon nanotube (10wt%) that 5gNMP disperses drop in the ball mill pot, add 10mL NMP solvent, 60g zirconium oxide Ball mill the beads at 400r / min for 24 hours, put them in a vacuum drying oven for 12 hours at 80°C and vacuum dry for 12 hours to obtain the primary mixture; weigh 1g of the primary mixture and place it in a mortar, add 1g of PEG, grind it evenly and place it in a porcelain In the boat, under the protection of argon atmosphere, the temperature was raised to 120°C at a rate of 1°C / min, kept for 1 hour, then raised to 580°C at a rate of 5°C / min, kept for 4 hours, and then heated to 800°C, heat preservation for 1 hour, and then naturally cool down to room temperature to obtain nano-silicon / expanded graphite / multi-walled carbon nanotubes / carbon composite material;
[0070] Get 6g of the above-mentioned prepared nano-sili...
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 |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a lithium ion battery cathode, which comprises a metal current collector, a conductive agent, an adhesive and a cathode active substance, wherein the cathode active substance is a nano particle / layered carbon / fiber carbon / carbon composite material. The invention further discloses application of the lithium ion battery cathode. According to the lithium ion battery cathode disclosed by the invention and the application of the lithium ion battery cathode, the nano particle / layered carbon / fiber carbon / carbon composite material is used as the cathode active substance, so that the cycle performance, the specific capacity and the rate performance of the lithium ion battery can be effectively improved. A test shows that the lithium ion battery can keep the discharge capacity at about 1303 mAh / g after being cyclically subjected to charging and discharging by 20 turns at a current density of 200 mA / g (calculated on the basis of the mass of the cathode active substance, the same below) at room temperature, and the capacity retention ratio is up to 93.1 percent, so that the cycle performance is excellent. The preparation process disclosed by the invention is simple, easy to operate and favorable for mass production.
Description
technical field [0001] The invention relates to the technical field of chemical power sources, in particular to a negative electrode of a lithium ion battery and an application thereof. Background technique [0002] Due to the advantages of high energy ratio, light weight, high rated voltage, and low self-discharge rate, lithium-ion batteries have been widely researched and applied in academia and industry. Like other battery systems, lithium-ion batteries are mainly composed of four key materials: positive electrode materials, negative electrode materials, separators, and electrolytes. The performance of materials directly affects the performance of lithium-ion batteries. [0003] At present, the cathode materials mainly include transition metal oxide materials (LiCoO 2 , LiNiO 2 and LiMn 2 o 4 etc.), lithium iron phosphate materials and ternary nickel-cobalt-manganese materials, etc. Anode materials mainly include lithium intercalation materials, lithium alloy materia...
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): H01M4/66H01M4/36H01M4/583H01M4/62H01M10/0525
CPCH01M4/366H01M4/583H01M4/625H01M4/667H01M10/0525Y02E60/10
Inventor 李坤樊少娟杨茂萍
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY