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Preparation method of high-cycle lithium storage type carbon material

A technology for lithium batteries and carbon materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor lithium storage performance, and achieve the effects of improving electrical conductivity, improving structural stability, and improving lithium storage performance.

Inactive Publication Date: 2018-08-21
CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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Problems solved by technology

[0004] Technical problem to be solved by the present invention: Aiming at the problem of poor lithium storage performance of existing lithium battery carbon materials, a preparation method of high cycle lithium storage carbon materials for lithium batteries is provided

Method used

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  • Preparation method of high-cycle lithium storage type carbon material

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Embodiment Construction

[0017] Wash the soybean stalks and let them dry naturally at room temperature, collect the dried soybean stalks, wash and dry the beef bones, mix the dried soybean straws with the dried beef bones at a mass ratio of 1:1, and use a pulverizer Crush, grind and pass through a 45-60 mesh sieve to obtain mixed grinding powder. Collect the mixed grinding powder and place it in a muffle furnace. After exhausting the air with nitrogen, slowly raise the temperature to 850-900 °C at 5°C / min for carbonization treatment for 10- 15min, after the carbonization is completed, let it stand and cool to room temperature to prepare carbonized particles; then according to the mass ratio of 1:5, stir and mix the carbonized particles with a mass concentration of 15% zinc chloride solution, then filter and collect the filter cake, and filter The cake is placed in a high-temperature pyrolysis furnace, activated at 100-120°C for 10-15 minutes, then left to cool to room temperature, ground and passed thr...

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Abstract

The invention relates to a preparation method of a high-cycle lithium storage type carbon material and belongs to the technical field of lithium battery materials. The preparation method is characterized in that soybean straws and bovine bones are adopted as raw materials; as the soybean straws and the bovine bones contain a large amount of phosphorus, nitrogen and other elements, more active sites are provided, so that the specific capacity of a lithium ion battery can be improved; as nitrogen atoms and carbon atoms in a biomass material exist in two main bonding forms, namely pyridine-like carbon nitrogen and graphite-like carbon nitrogen, the atoms in a graphite-like carbon nitrogen structure replace C atoms in a carbon-based skeleton, and unpaired electrons of heteroatoms produce conjugation with Pi electron clouds in the carbon-based skeleton, so that the density of the electron clouds in the carbon-based skeleton is enhanced, and the conductive property of the carbon-based skeleton is favorably improved; a pyridine-like carbon nitrogen structure forms a large amount of defects in a carbon molecular network, so that the proportion of the marginal surface of a system is increased, the interaction between the carbon-based skeleton and an electrolyte solution is favorably enhanced, the electrochemical property is favorably improved, and the lithium storage property of the carbon material in a lithium battery is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a high-cycle lithium-storage carbon material for lithium batteries, belonging to the technical field of lithium battery materials. Background technique [0002] Lithium-ion battery is a new type of rechargeable battery. The earliest development began in the 1960s. The starting point was the urgent need for light-weight and high-performance batteries in the aerospace sector. The first commercial lithium-ion battery that came out in the 1970s was a lithium primary battery, which was soon used in small electronic devices such as electronic watches, calculators, and cardiac pacemakers, and has been used to this day. After more than 20 years of development, not only the performance of lithium-ion batteries has been greatly improved, but also the production process and scale have been continuously improved and expanded. In the foreseeable future, thanks to the rise of the field of electric vehicles, research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/625Y02E60/10
Inventor 董发勇蒋益
Owner CHANGZHOU DAAO NEW MATERIAL TECH CO LTD
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