ZnNiO/C composite nano material and preparation method thereof

A composite nanomaterial and nanostructure technology, applied in the field of composite nanomaterials and composite electrode materials, can solve problems such as poor cycle stability, and achieve the effect of easy industrialization and low equipment and operation requirements.

Active Publication Date: 2019-09-17
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem of poor cycle stability caused by volume expansion of charge and discharge in traditional zinc oxide lithium ion battery negative electrode materials

Method used

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  • ZnNiO/C composite nano material and preparation method thereof
  • ZnNiO/C composite nano material and preparation method thereof
  • ZnNiO/C composite nano material and preparation method thereof

Examples

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Embodiment Construction

[0024] The present invention will be further described below with specific examples.

[0025] The experimental steps in the example are as follows:

[0026] 1. Weigh 1mmol, 0.5mmol and 0.5mmol respectively according to the ratio of (molar ratio) glycolic acid: zinc chloride hexahydrate: nickel chloride hexahydrate = 2:1:1; In the vinyl fluoride reaction kettle, add 15ml of solvent absolute ethanol; ultrasonically mix for 20min until there is no granular solid;

[0027] 2. Put the reaction kettle into the heating furnace, set the holding temperature to 160°C, and the holding time to 16h; then let the reaction kettle cool down with the furnace;

[0028] 3. Transfer the solid-liquid mixture in the reaction kettle into a centrifuge tube, wash it twice with absolute ethanol and deionized water, and wash it once with absolute ethanol; put the obtained solid in a constant temperature drying oven at 60°C to dry for a period of time , to obtain MOF materials containing zinc and nicke...

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Abstract

The invention discloses a ZnNiO/C composite nano material. The microstructure of the nano material is of a honeycomb structure. The scale of the honeycomb structure is 2.5-3.5 [mu]m, and the honeycomb structure is formed by granular nano-structures and lamellar structures arranged in a staggered manner, so a porous structure containing a large number of pores is formed. The invention also discloses a preparation method of the ZnNiO/C composite nano material. The method comprises the following steps: taking ZnCl2 and NiCl2 as metal sources of organic metal frame compounds, and taking glycolic acid as an organic ligand of an MOF material; synthesizing an MOF material containing nickel and zinc elements; and carbonizing in a quartz tube type furnace to obtain the ZnNiO/C composite nano material. The material is used as a lithium ion battery electrode material, shows a high specific capacity of 30mAh/g after 500 times of circulation at a discharge current of 600mA/g, and has good cycling stability.

Description

technical field [0001] The invention relates to the field of composite nanomaterials, in particular to the field of composite electrode materials for lithium ion batteries and a preparation method thereof. Background technique [0002] Today, with the increasingly serious environmental pollution and the gradual depletion of fossil fuels, it is particularly important to seek energy storage devices with high energy density, long service life, high efficiency, low cost, and environmental friendliness in the energy field. With the development of portable electronic devices and hybrid electric vehicles, the demand for batteries with high energy and high power is becoming increasingly urgent. At present, many people are focusing on the exploration and research of lithium-ion batteries. [0003] Lithium-ion batteries are generally filled with an electrolyte between the positive and negative electrodes to form a channel for ion dissociation, and a separator is used to separate the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/583H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/52H01M4/583H01M10/0525Y02E60/10
Inventor 吕建国吕鑫胜葛舒宁郭忆闻郭一川
Owner ZHEJIANG UNIV
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