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Performance improvement method and application of a carbon-based negative electrode material for sodium-ion batteries

A sodium ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, carbon preparation/purification, etc., to achieve the effects of abundant sodium storage sites, stable cycle performance, and increased carbon yield

Active Publication Date: 2022-06-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the shortcomings of the above-mentioned technologies, the present invention provides a performance improvement method and application of a carbon-based negative electrode material for a sodium-ion battery, which effectively solves the problem of graphitization of the carbon-based battery negative electrode material in the carbonization process , and can increase its carbon yield

Method used

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  • Performance improvement method and application of a carbon-based negative electrode material for sodium-ion batteries

Examples

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Embodiment 1

[0048] A carbon-based negative electrode material for a sodium ion battery, the specific preparation steps of which are as follows: first, pre-oxidizing the pitch, placing 2.0 g of pitch in an alumina crucible, and placing the sample in a tube furnace continuously fed with high-purity air. The temperature was raised to 290°C at a rate of 5°C / min, and the heating was stopped after holding for 3 hours, and then cooled to room temperature naturally. After that, the pre-oxidized asphalt and lignin were placed in a 50 mL agate ball mill jar with agate balls in a mass ratio of 7:3, and the ball-to-material ratio was 2:1, and 10 mL of water was added to the ball mill jar. In the ball mill at a speed of 400 rpm, the ball mill was paused for 15 minutes every 30 minutes, and lasted for a total of 4 hours. After the ball-milling, the ball-milling beads were separated with a mesh, and the resulting mixture was dehydrated in an oven at 80°C. The dried mixture was placed in a graphite cruc...

Embodiment 2

[0056] A carbon-based negative electrode material for a sodium ion battery: lignin is replaced with phenolic resin, the others are the same as in Example 1, and the electrochemical properties are shown in Table 1.

Embodiment 3

[0058] A carbon-based negative electrode material for a sodium ion battery: replace lignin with cellulose, and the others are the same as in Example 1, and its electrochemical properties are shown in Table 1.

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Abstract

The invention discloses a performance improvement method and application of a carbon-based negative electrode material for a sodium ion battery, comprising the following steps: S1, pre-oxidizing a soft carbon precursor; S2, combining the pre-oxidized soft carbon precursor with a hard carbon The precursors are mixed to form a mixture material; S3, put the obtained mixture material into a high-temperature carbonization furnace; S4, cool the high-temperature treatment product to room temperature, and obtain an amorphous carbon material, which is a carbon-based negative electrode material for a sodium-ion battery. An electrode material, comprising the carbon-based negative electrode material for a sodium ion battery prepared by the method for improving performance. A negative electrode sheet for a sodium ion battery, comprising the carbon-based negative electrode material for the sodium ion battery prepared by the performance improving method. A sodium ion battery, comprising the above-mentioned negative electrode sheet. The invention applies the prepared carbon-based negative electrode material of the sodium ion battery to the sodium ion battery, so that the sodium ion battery has higher capacity and energy density, stable cycle performance and good safety performance.

Description

technical field [0001] The invention relates to a performance improvement method and application, in particular to a performance improvement method and application of a carbon-based negative electrode material for a sodium ion battery, and belongs to the technical field of battery materials. Background technique [0002] With the goal of "carbon peaking and carbon neutrality" being put forward, people's awareness of environmental protection has been further enhanced, and the need to develop renewable energy to replace traditional fossil energy is becoming more and more urgent. Secondary energy sources such as wind energy, tidal energy, and solar energy have the characteristics of unstable power generation, and it is difficult to directly integrate into the existing power grid. At the same time, the existing power grid also has the need to cut peaks and fill valleys. In the process of meeting the above requirements, electrochemical secondary energy storage technology plays a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/587
CPCC01B32/05H01M4/587H01M4/133H01M10/054Y02E60/10
Inventor 褚家祺郭炳焜周晶晶
Owner SHANGHAI UNIV