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Sodion secondary battery negative electrode material and preparing method and application thereof

A technology of secondary battery and negative electrode material, applied in the field of materials, can solve the problems of restricting the large-scale application of hard carbon materials, complicated preparation process of hard carbon materials, and high price of hard carbon, achieving high production efficiency, simple preparation method and low cost Effect

Active Publication Date: 2015-12-23
BEIJING HINA BATTERY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The precursors for preparing hard carbon materials mainly include cellulose, sugars, furan resins, phenolic resins, and polyvinylidene chloride. Due to the high price of these precursor materials and low carbon production rate, the price of hard carbon is relatively high. Moreover, the preparation process of many reported hard carbon materials is complicated, and these shortcomings limit the large-scale application of hard carbon materials.

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  • Sodion secondary battery negative electrode material and preparing method and application thereof
  • Sodion secondary battery negative electrode material and preparing method and application thereof
  • Sodion secondary battery negative electrode material and preparing method and application thereof

Examples

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Embodiment 1

[0058] Embodiment 1 of the present invention provides a negative electrode material for a sodium ion secondary battery. The material is an amorphous carbon material, and coal and hard carbon precursors are used as raw materials. After adding a solvent, they are mechanically mixed, dried, and then passed through an exchange process under an inert atmosphere. It is prepared by linking, solidifying and cracking.

[0059] Coal and hard carbon precursors are mixed mechanically after adding a solvent at a mass ratio of 1:(0-0.99) to obtain a slurry; then dry the obtained slurry; perform crosslinking, curing, and cracking reactions under an inert atmosphere, Finally, the required materials are obtained. It should be noted that the 1:0 situation does not exist at this time, that is, the hard carbon precursor must exist at this time.

[0060] Among them, the solvent can be selected from one or any mixture of water, ethanol, isopropanol, acetone and dimethylformamide; the coal can be s...

Embodiment 2

[0065] Embodiment 2 of the present invention provides a negative electrode material for a sodium ion secondary battery, which is an amorphous carbon material prepared by cracking coal as a raw material under an inert atmosphere.

[0066] Among them, the coal can be selected from one or any mixture of anthracite, bituminous coal and lignite.

[0067] Optionally, gas containing hydrocarbons can also be added during the reaction process for surface coating, so that the surface has a coating layer, preferably natural gas, methane, ethane, toluene, ethylene, acetylene, propyne and the like.

[0068] Wherein, the above-mentioned materials are granular, and the average particle size of the particles is 1-50 μm; d 002 Value between 0.35-0.42nm, L c Value between 1-4nm, L a The value is between 3-5nm.

[0069] The sodium ion secondary battery negative electrode material provided in this example is prepared from coal, which can not only increase the yield of amorphous carbon, but als...

Embodiment 3

[0071] This embodiment provides a kind of preparation method of sodium ion secondary battery negative electrode material, and its steps are as follows figure 2 shown, including:

[0072] (1) Add coal and hard carbon precursors to a solvent and then mechanically mix to obtain a slurry;

[0073] Specifically, the coal and the hard carbon precursor are added into a solvent at a mass ratio of 1: (0-0.99) and then mechanically mixed to obtain a uniform slurry. What needs to be explained is that the 1:0 situation does not exist at this time, that is, the hard carbon precursor must exist at this time. Among them, the solvent can be selected from one or any mixture of water, ethanol, isopropanol, acetone and dimethylformamide; the coal can be selected from one or any mixture of anthracite, bituminous coal and lignite; The carbon precursor can be selected from one or any mixture of glucose, sucrose, lignin, cellulose, starch, phenolic resin, polyacrylonitrile and epoxy resin;

[00...

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Abstract

The invention discloses a sodion secondary battery negative electrode material and a preparing method and application thereof. The material is an amorphous carbon material and obtained by carrying out pyrolysis on coal as a main raw material. The coal and a hard carbon precursor serve as raw materials and are mechanically mixed after solvent is added, dried, and subjected to crosslinking, solidifying and splitting in inert atmosphere to prepare the material. Or the coal serves as the main raw material and is split in inert atmosphere to prepare the material. A sodion secondary battery adopting the material as the negative electrode material has low cost and high work voltage and is stable in circulation and high in safety.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a negative electrode material for a sodium ion secondary battery, a preparation method and application thereof. Background technique [0002] With the depletion of fossil fuels, the use of renewable energy such as solar energy and wind energy has attracted more and more attention. However, the intermittent nature of these renewable energy sources makes them unable to supply power to the grid continuously and stably. Therefore, the development of energy storage systems is crucial for sustainable The use of renewable energy is crucial. Sodium-ion batteries have a potential low-cost advantage due to the abundant reserves and wide distribution of sodium; more importantly, using sodium ions as a carrier, new electrochemical reaction mechanisms and new materials are discovered, thereby achieving the purpose of further reducing costs. For example: sodium does not react with aluminum ...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/1393H01M4/133H01M10/054
CPCH01M4/133H01M4/1393H01M4/583H01M10/054H01M4/366H01M4/587H01M2004/027Y02E60/10
Inventor 胡勇胜李云明陈立泉
Owner BEIJING HINA BATTERY TECH CO LTD
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