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Novel battery material and preparation method and application thereof

A battery material and new technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of decreased battery cycle stability, limited to artificial synthesis, active material shedding, etc., to achieve high yield, high specific capacity, The effect of long cycle life

Active Publication Date: 2019-05-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If silicon is deintercalated to a high degree of lithium, it is very easy to cause a very huge volume change (over 300%), and the continuous volume change is likely to cause cracking and loosening of the electrode, resulting in the shedding of silicon particles, and the active material falls off from the current collector. , leading to a significant decrease in the cycle stability of the battery
[0004] At the same time, molybdenum disulfide with a graphene-like structure has twice the theoretical capacity of graphite (670mAh / g), and is an ideal battery material. However, its preparation methods are mostly limited to artificial synthesis. Due to the limitation of preparation methods, When it is used as a battery material, there is a problem of high cost

Method used

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  • Novel battery material and preparation method and application thereof

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Effect test

example 1

[0034] First, at room temperature, use molybdenite fine powder with a Mo content of 57% obtained from ore dressing and enrichment as raw material, and grind it into molybdenite fine powder with an average particle size of 10 μm; Delamination treatment, shear rate at 50000s -1 , the concentration of molybdenite micropowder in the suspension is controlled at 0.5%, the temperature of the suspension is controlled at 20°C, and the treatment time is 0.5h to prepare the molybdenite suspension; Centrifuge for 10 minutes, after the centrifuged solid is dried, mix the obtained solid material with sodium carboxymethyl cellulose and conductive carbon black in a mass ratio of 70:15:15, add an appropriate amount of ultrapure water to make a slurry and apply it to nickel After the water evaporates, place it in a vacuum drying oven, and dry it at 100°C for 12 hours to prepare an electrode sheet. Then the prepared electrode containing molybdenum disulfide is used as the negative electrode, an...

example 2

[0036] First, at room temperature, use molybdenite fine powder with a Mo content of 59% obtained from ore dressing enrichment and hydrometallurgical impurity removal as raw material, and grind it into molybdenite fine powder with an average particle size of 30 μm; then use high-shear homogeneous The machine carries out the peeling treatment of molybdenite powder, and the shear rate is 20000s -1 , the concentration of molybdenite micropowder in the suspension is controlled at 5%, the temperature of the suspension is controlled at 60°C, and the treatment time is 6h to prepare a molybdenite suspension; the molybdenite suspension is centrifuged at a speed of 150,000rpm for 10min , after the centrifuged solid is dried, the obtained solid material is mixed evenly with sodium carboxymethyl cellulose and conductive carbon black in a mass ratio of 70:15:15, and an appropriate amount of ultrapure water is added to make a slurry and coated on a nickel mesh. After the water is volatilized...

example 3

[0038] First, at room temperature, molybdenite fine powder with a Mo content of 58% obtained by hydrometallurgical removal of impurities was used as raw material to grind molybdenite fine powder with an average particle size of 40 μm; then a high-shear homogenizer and ultrasonic Peeling treatment of molybdenite fine powder, the shear rate of the homogenizer is 150000s -1 , the ultrasonic frequency is controlled at 100kHz, the ultrasonic power is 900W, the concentration of molybdenite micropowder in the suspension is controlled at 8%, the temperature of the suspension is controlled at 90°C, and the treatment time is 4h, the molybdenite suspension is prepared; the molybdenite The ore suspension was centrifuged at 15,000 rpm for 10 minutes, and the centrifuged solids were dried. Mix the obtained solid material with sodium carboxymethyl cellulose and conductive carbon black evenly in a mass ratio of 70:15:15, add an appropriate amount of ultrapure water to make a slurry and apply ...

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Abstract

The invention belongs to the field of battery electrodes and relates to a novel battery material and a preparation method and application thereof. The raw materials of the novel battery material include a carbonaceous material and delaminated molybdenum disulfide. After component optimization, the novel battery material also can contain a high-battery-capacity material. According to the preparation method of the novel battery material, all components are uniformly mixed according to a set proportion. Meanwhile, the delaminated molybdenum disulfide can be directly acquired from molybdenite. After optimization, the designed and prepared delaminated molybdenum disulfide composite battery material integrates the advantages of the carbonaceous material, the high-battery-capacity material and molybdenum disulfide, has the advantages of high specific capacity, high magnification, good stability and long circulation life without a volume effect and is applicable to a lithium-ion battery and alithium-ion supercapacitor or a sodium-ion battery and a sodium-ion supercapacitor to serve as a cathode lithium / sodium-storing material. Meanwhile, the preparation method of the composite cathode material is simple and efficient, comprises less procedures and is high in productivity and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of battery electrodes, and relates to a novel battery material and a preparation method and application thereof. Background technique [0002] Lithium-ion battery is a new type of secondary energy storage battery developed in the 1990s. It is widely used in mobile applications due to its advantages such as high specific energy, high battery voltage, wide operating temperature range, stable discharge, and long storage life. Phones, notebook computers, video cameras, digital cameras, electric vehicles and other fields. Especially in the field of electric vehicles, electric vehicles have become one of the effective ways to alleviate oil consumption and solve environmental pollution. At present, the commercial lithium-ion battery anode materials are mainly carbon anode materials, but the theoretical specific capacity of graphite is only 372mAh / g, which seriously hinders the further improvement of the specific energy of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M4/583H01M4/587H01M10/0525H01M10/054
CPCY02E60/10
Inventor 纪效波孙伟李思杰唐鸿鹄侯红帅江锋周嘉辉
Owner CENT SOUTH UNIV
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