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Carbon-based nano material for lithium battery and preparation method of carbon-based nano material

A technology of carbon-based nanomaterials and lithium batteries, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of unsealable batteries and low utilization of active materials, and achieve improved electrochemical behavior, suppressed hydrogen evolution, and enhanced dispersion effects Effect

Active Publication Date: 2022-01-04
江苏华清能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing lithium battery, the addition of carbon materials to the lithium battery will cause hydrogen evolution in the battery, resulting in the failure of the battery to be sealed and the low utilization rate of the active material.

Method used

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  • Carbon-based nano material for lithium battery and preparation method of carbon-based nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The invention provides a carbon-based nanomaterial for lithium batteries, comprising: 91.40g of electrolytic graphene, 8.60g of inhibitors; the inhibitors include: 2.4596g of zinc nitrate, 2.5284g of silver nitrate, 2.5972g of Bismuth nitrate pentahydrate, 1.0148g sodium hydroxide;

[0027] A method for preparing carbon-based nanomaterials for lithium batteries, the specific preparation steps are as follows:

[0028] Step 1: according to the above weight ratio, weigh electrolytic graphene, zinc nitrate, silver nitrate, bismuth nitrate pentahydrate, and sodium hydroxide in the inhibitor;

[0029] Step 2: adding the electrolytic graphene in step 1 to deionized water, and performing ultrasonic treatment for 10 minutes to obtain an electrolytic graphene dispersion;

[0030] Step 3: Add zinc nitrate, silver nitrate, bismuth nitrate pentahydrate, and sodium hydroxide in the inhibitor of step 1 to the electrolytic graphene dispersion, add deionized water, stir evenly, adjust ...

Embodiment 2

[0037] Different from Example 1, it includes: 92.40g of electrolytic graphene, 7.60g of inhibitors; the inhibitors include: 2.2648g of zinc nitrate, 2.3104g of silver nitrate, 2.3864g of bismuth nitrate pentahydrate, 0.6384g g sodium hydroxide.

Embodiment 3

[0039] All different from Examples 1-2, including: 91.90g of electrolytic graphene, 8.10g of inhibitors; the inhibitors include: 2.3652g of zinc nitrate, 2.4219g of silver nitrate, 2.4948g of nitric acid pentahydrate Bismuth, 0.8181g sodium hydroxide.

[0040]Take the carbon-based nanomaterials for lithium batteries prepared in the above-mentioned Examples 1-3 and the carbon-based nanomaterials for lithium batteries of the control group 1, the carbon-based nanomaterials for lithium batteries of the control group 2, and the lithium battery of the control group 3 respectively. With carbon-based nanomaterials, the carbon-based nanomaterials for lithium batteries of the control group four and the carbon-based nanomaterials for lithium batteries of the control group five, the carbon-based nanomaterials for lithium batteries of the control group one compared with the examples without zinc nitrate, Compared with the examples, the carbon-based nanomaterials for lithium batteries of th...

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Abstract

The invention discloses a carbon-based nano material for a lithium battery and a preparation method of the carbon-based nano material, and particularly relates to the technical field of lithium battery materials, and the carbon-based nano material comprises electrolytic graphene and an inhibitor. The surface of the carbon material can be effectively modified, the hydrogen evolution potential of the carbon material can be effectively reduced, and the density and granularity of the carbon-based nano material for the lithium battery can be effectively improved, so that the electrochemical behavior of the carbon material in an electrolyte is improved, and meanwhile, the combination effect between the carbon material and a negative plate active substance is enhanced; the carbon material cannot fall off in the working process of the battery; zinc nitrate, silver nitrate and bismuth nitrate pentahydrate are subjected to microwave hydrothermal irradiation treatment in an alkaline environment, nano-zinc oxide, nano-silver oxide and nano-bismuth oxide can be effectively synthesized, the nano-zinc oxide, nano-silver oxide and nano-bismuth oxide are compounded to the surface of water-soluble graphene, the surface of the water-soluble graphene is modified, and the hydrogen evolution inhibition effect of the carbon-based nano material for the lithium battery can be effectively enhanced.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, more specifically, the invention relates to a carbon-based nanomaterial for lithium batteries and a preparation method thereof. Background technique [0002] Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Li-ion batteries do not contain metallic lithium and are rechargeable. The positive electrode of the lithium-ion battery uses lithium compounds-lithium cobaltate and lithium manganate, and the negative electrode uses lithium-carbon interlayer compounds. Due to its high working voltage, small size, light weight, high energy, no memory effect, no pollution, small self-discharge, and long cycle life, lithium-ion batteries are ideal energy carriers for development in the 21st century. As a carbon nanomaterial, graphene does not go beyond the scope of carbon materials commonly used in lithium batteries. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62
CPCH01M4/38H01M4/625H01M4/628Y02E60/10
Inventor 王自强王晟
Owner 江苏华清能源科技有限公司
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