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Rod-shaped structure Zn2GeO4 material as well as preparation method and application thereof

A rod-like structure and uniform technology, applied in structural parts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low Coulombic efficiency, poor cycle stability, poor rate performance, etc., to achieve improved cycle performance, not easy to reunite, long The effect of diameter ratio

Pending Publication Date: 2022-05-27
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For above-mentioned technical problem, the present invention proposes a kind of rod-like structure Zn 2 GeO 4 Material and its preparation method and application, solve Zn in the prior art 2 GeO 4 When used as anode materials for energy storage devices such as lithium-ion batteries, they face problems such as low initial Coulombic efficiency, poor cycle stability, and poor rate performance.

Method used

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  • Rod-shaped structure Zn2GeO4 material as well as preparation method and application thereof
  • Rod-shaped structure Zn2GeO4 material as well as preparation method and application thereof
  • Rod-shaped structure Zn2GeO4 material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The rod-like structure Zn of this example 2 GeO 4 The preparation method of the material, the steps are as follows:

[0035] (1) Slowly add 52 mg (0.5 mmol) of GeO to 10 mL of water 2 , 0.6057g (5mmol) of Tris, and stir evenly until a homogeneous and transparent Ge-Tris solution is formed.

[0036](2) Add 10 mL of diethylenetriamine, 10 mL of water, and 189 mg (1 mmol) of Zn(NO) to the Ge-Tris solution prepared in step (1) under stirring. 3 ) 2 , stir to prepare 50 mL of reaction solution, put the reaction solution into the reaction kettle, place it in a 200 ℃ oven, react for 10 h, naturally cool to room temperature, centrifuge, wash with distilled water, and put the solid obtained from the reaction into 70 ℃ Dry in the oven, that is.

[0037] ①Physical phase test: the rod-shaped Zn prepared in this example 2 GeO 4 The material is tested by XRD, such as figure 1 It can be seen from the figure that in the XRD pattern of Zn 2 GeO 4 The diffraction peaks of all c...

Embodiment 2

[0040] The rod-like structure Zn of this example 2 GeO 4 The preparation method of the material includes the following steps:

[0041] (1) Slowly add 10.5 mg (0.1 mmol) of GeO to 10 mL of water 2 , 0.2423 g (2 mmol) of Tris and stirred until a homogeneous and transparent solution was formed.

[0042] (2) Add 10ml of diethylenetriamine and 10ml of water, 37.8mg (0.2mmol) of Zn(NO) to the solution prepared in step (1) under stirring. 3 ) 2 , stir to prepare 50ml of reaction solution, put the reaction solution into the reaction kettle, place it in a 180°C oven, react for 10h, naturally cool to room temperature, centrifuge, wash with distilled water, and put the solid obtained from the reaction into 70°C Drying in an oven to obtain rod-shaped Zn 2 GeO 4 Material.

Embodiment 3

[0044] The rod-like structure Zn of this example 2 GeO 4 The preparation method of the material includes the following steps:

[0045] (1) Slowly add 52.3 mg (0.5 mmol) of GeO to 10 mL of water 2 , 1.2114 g (10 mmol) of Tris and stirred until a homogeneous and transparent solution was formed.

[0046] (2) Add 10ml of diethylenetriamine and 10ml of water, 183mg (1mmol) of Zn(CH) to the solution prepared in step (1) under stirring. 3 COO) 2 , stir to prepare 50ml of reaction solution, put the reaction solution into the reaction kettle, place it in a 220°C oven, react for 5h, naturally cool to room temperature, centrifuge, wash with distilled water, and put the solid obtained from the reaction into 70°C Drying in an oven to obtain rod-shaped Zn 2 GeO 4 Material.

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Abstract

The invention belongs to the technical field of electrode materials in the field of energy storage, and relates to a rod-shaped Zn2GeO4 material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving GeO2 and Tris in deionized water to form a transparent and uniform Ge-Tris solution; adding zinc nitrate and diethylenetriamine into the Ge-Tris solution for hydrothermal reaction to obtain a Zn2GeO4 solution, and cooling, filtering and drying after the reaction is finished to obtain the Zn2GeO4 material with the rod-like structure. The length of the prepared rod-like material is 8-30 microns, and the diameter of the rod-like material is 2-8 microns. The rod-like material is used as a negative electrode to be applied to the lithium ion battery, the electron transmission performance is excellent, and the first discharge capacity is 1510.5 mAh / g at the charge-discharge rate of 100 mA / g; after the battery is discharged at different rates, when the battery returns to 100mA / g, the discharge capacity of the battery reaches 80% of the initial discharge capacity.

Description

technical field [0001] The invention belongs to the technical field of electrode materials in the field of energy storage, and relates to a rod-shaped structure Zn 2 GeO 4 Materials and preparation methods and applications thereof. Background technique [0002] Energy storage devices such as lithium-ion batteries have many advantages such as high energy density, high power density, long cycle life, low self-discharge rate, and “green” environmental protection, and have become a hotspot for applications. The current lithium-ion battery anode material is commercial graphite, and its low theoretical specific capacity (only 372mAh / g) can no longer meet the growing demand for high-energy-density lithium-ion batteries in the future. Therefore, ongoing research work is mainly focused on developing Low-cost, high-performance anode materials. However, due to the limitations of energy storage devices such as lithium-ion batteries, their performance improvement has encountered a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G17/00H01M4/485
CPCC01G17/00H01M4/485C01P2002/72C01P2004/10C01P2006/40Y02E60/10
Inventor 曹阳魏巍方华张爱勤张勇
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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