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Waste rubber material-based electrode material for secondary battery and preparation method of electrode material

A waste rubber, secondary battery technology, applied in battery electrodes, secondary batteries, negative electrodes, etc., can solve problems such as poor battery cycle performance and rate performance, high electrochemical impedance of porous carbon materials, human skin and respiratory tract damage. , to achieve the effect of high capacity, low price and low production cost

Active Publication Date: 2020-06-16
博尔特新材料(银川)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method for preparing porous carbon materials from waste rubber tires is disclosed in the article Research on the Performance of Waste Rubber Tire Thermal Cracking Products Used as Carbon Anode Materials for Lithium (ion) Batteries (Acta Molecular Science, 2019, 35, 5:411-416) , the porous carbon material is prepared by removing impurities, crushing, thermal cracking, and acidifying and purifying the waste tires. , Strong acid treatment and purification will cause damage to human skin and respiratory tract in the early stage of purification, and inadvertent post-treatment discharge will easily pollute water and soil resources, making it difficult to commercialize. Moreover, the electrochemical impedance of porous carbon materials is relatively large, which leads to the cycle performance and rate performance of the battery. poor

Method used

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  • Waste rubber material-based electrode material for secondary battery and preparation method of electrode material
  • Waste rubber material-based electrode material for secondary battery and preparation method of electrode material
  • Waste rubber material-based electrode material for secondary battery and preparation method of electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0082] 1. Preparation of secondary carbon-sulfur particle NCS matrix

[0083] Use a pulverizer to grind the cleaned waste rubber into waste rubber powder with a particle size of 2-3 μm, weigh 1000g of waste rubber powder and 50g of impurity remover potassium fluoride and mix them evenly in solid phase, then place them in a high-temperature atmosphere furnace, nitrogen flow rate Heat up to 500°C for 4 hours at a heating rate of 2°C / min, cool naturally to room temperature, crush through a 200-mesh sieve, wash with ethanol solution to remove ungasified fluoride, and dry to remove Secondary carbon-sulfur particle NCS matrix after impurities.

[0084] 2. The substrate is coated with pyrolytic carbon coating layer C

[0085] Solid-phase coating granulation is adopted. According to the mass ratio of 100:6, NCS and coating agent powder pitch are mixed evenly in solid phase and then transferred to a ball mill tank. The grinding body is zirconia balls with a particle size of 3 mm. NCS ...

Embodiment 2

[0089] 1. Preparation of secondary carbon-sulfur particle NCS matrix

[0090] Use a pulverizer to crush the cleaned waste rubber into waste rubber powder with a particle size of 2-3 μm, weigh 1000g of waste rubber powder and 80g of impurity remover potassium bromide in solid phase and mix them evenly in a high-temperature atmosphere furnace. The flow rate is 6L / min, and the temperature is raised to 700°C at a heating rate of 2.5°C / min for 3.5 hours, and then cooled to room temperature naturally. After being crushed through a 200-mesh sieve, it is washed with ethanol solution to remove ungasified bromide. After drying, The secondary carbon-sulfur particle NCS matrix after removing impurities is obtained.

[0091] 2. The substrate is coated with pyrolytic carbon coating layer C

[0092] Using liquid phase coating, according to the mass ratio of 100:7, NCS and coating agent sucrose are added to the ethanol solution, the mass of NCS and coating agent is 28% of the sum of the mass...

Embodiment 3

[0104] 1. Preparation of secondary carbon-sulfur particle NCS matrix

[0105] Use a pulverizer to crush the cleaned waste rubber into waste rubber powder with a particle size of 2 to 3 μm, weigh 1000g of waste rubber powder and 100g of impurity remover sodium fluoride and mix them evenly in solid phase, then place them in a high-temperature atmosphere furnace, helium gas The flow rate is 7L / min, heat up to 800°C at a heating rate of 3°C / min for 3 hours, cool naturally to room temperature, grind through a 200-mesh sieve, wash with methanol solution to remove ungasified fluoride, and dry to obtain Secondary carbon-sulfur particle NCS matrix after removing impurities.

[0106] 2. The substrate is coated with pyrolytic carbon coating layer C

[0107] Solid-phase coating granulation is adopted. According to the mass ratio of 100:8, NCS and coating agent emulsified asphalt are mixed evenly in solid phase and then transferred to a mechanical fusion machine. Mixing and coating at a s...

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Abstract

The invention discloses a waste rubber material-based electrode material for a secondary battery and a preparation method of the electrode material, and aims to improve the electrochemical performanceof the secondary battery and protect the environment. According to the waste rubber material-based electrode material for the secondary battery, secondary carbon-sulfur particles consisting of densely-arranged hexagonal nano zinc sulfide particles and thin-layer microcrystalline graphite which is coated and bridged on the surfaces and the peripheries of the nano zinc sulfide particles and is distributed in the same way are used as a matrix, and the matrix is externally coated with a pyrolytic carbon coating layer. The preparation method comprises the steps of preparing secondary carbon-sulfurparticles, and coating a pyrolytic carbon coating layer. Compared with the prior art, the waste rubber material is used for preparing the electrode material for the secondary battery, the source is wide, the price is low, and the prepared electrode material has high capacity, high-rate charging and discharging performance, long cycle life, environmental friendliness and low production cost, can be used as a negative electrode material of a lithium ion battery and can also be used as a positive electrode material of a lithium-sulfur battery.

Description

technical field [0001] The invention relates to an electrode material for a battery and a preparation method thereof, in particular to an electrode material utilizing waste rubber and a preparation method thereof Background technique [0002] As an indispensable material for people's daily life, such as daily use and medical use, rubber is also used as a material for various production equipment or components in mining, transportation, construction, machinery, electronics industry and emerging industries. With the continuous improvement of the synthesis and processing methods of rubber products, the output of various rubber products has increased year by year, and the extensive use of rubber products will generate a large amount of solid waste. Due to the strong heat resistance and corrosion resistance of waste rubber materials, it is difficult to self-degrade in a short period of time, thereby causing environmental pollution. At present, the comprehensive utilization of wa...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/364H01M4/5815H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 侯佼王兴蔚侯春平贺超杨丹
Owner 博尔特新材料(银川)有限公司
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