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Preparation method and application of ZnSnO3/NC composite material

A technology of composite materials and conditions, which is applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems that the conductivity and electrochemical properties of electrode materials need to be further improved, and achieve the improvement of electrical conductivity and electrochemical properties, Improve performance, improve the effect of volume expansion

Pending Publication Date: 2021-08-31
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ZnSnO 3 The conductivity and electrochemical performance of electrode materials still need to be further improved

Method used

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  • Preparation method and application of ZnSnO3/NC composite material
  • Preparation method and application of ZnSnO3/NC composite material
  • Preparation method and application of ZnSnO3/NC composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: a kind of ZnSnO 3 The preparation method of / NC composite material, comprises the steps:

[0032] (1) Preparation of ZnSnO 3 : Under ice bath conditions, 1.2g SnCl 4 ·5H 2 O (0.003mol) and 0.8g ZnSO 4 ·7H 2O (0.003mol) was added to 20mL 0.3mol / L NaOH solution and ultrasonically stirred for 12h to obtain a precipitate, which was washed with absolute ethanol and deionized water three times in turn, and then freeze-dried (temperature -30°C, vacuum degree 1Pa) to obtain a powder ; Move the above powder to a tube furnace, raise the temperature from room temperature to 700°C at a rate of 1°C / min under nitrogen protection, and calcinate for 2 hours to obtain light yellow ZnSnO 3 Powder, particle size is 50-100nm;

[0033] (2) ZnSnO 3 / Preparation of polypyrrole precursor: under ice bath condition, get 0.5g step (1) gained ZnSnO 3 The powder was ultrasonically dispersed into 70 mL of deionized water, 0.5 mL of pyrrole was added, and then 100 mL of 0.05 mo...

Embodiment 2

[0036] Embodiment 2: a kind of ZnSnO 3 The preparation method of electrode material, comprises the steps:

[0037] Under ice bath conditions, 1.2g SnCl 4 ·5H 2 O (0.003mol) and 0.8gZnSO 4 ·7H 2 O (0.003mol) was added into 20mL 0.3mol / L NaOH solution and ultrasonically stirred for 12 hours to obtain a precipitate, which was washed with absolute ethanol and deionized water three times in turn, and then freeze-dried (temperature -30°C, vacuum degree 1Pa) to obtain a powder ; Move the above powder to a tube furnace, raise the temperature from room temperature to 700°C at a rate of 1°C / min under nitrogen protection, and calcinate for 2 hours to obtain light yellow ZnSnO 3 Powder, particle size 50-100nm, purity over 99%.

Embodiment 3

[0038] Embodiment 3: a kind of ZnSnO 3 The preparation method of / NC composite material, comprises the steps:

[0039] (1) Preparation of ZnSnO 3 : Under ice bath conditions, 1.2g SnCl 4 ·5H 2 O(0.003mol) and 0.8gZnSO 4 ·7H 2 O (0.003mol) was added to 20mL 0.3mol / L NaOH solution and ultrasonically stirred for 12h to obtain a precipitate, which was washed with absolute ethanol and deionized water three times in turn, and then freeze-dried (temperature -30°C, vacuum degree 1Pa) to obtain a powder ; Move the above powder to a tube furnace, raise the temperature from room temperature to 700°C at a rate of 1°C / min under nitrogen protection, and calcinate for 2 hours to obtain light yellow ZnSnO 3 Powder, particle size 50-100nm, purity over 99%;

[0040] (2) ZnSnO 3 / The preparation of polypyrrole precursor: under ice-bath condition, get 0.5g step (1) gained ZnSnO 3 Disperse the powder in 70mL deionized water, add 1mL pyrrole, then add 120mL 0.05mol / L ammonium persulfate sol...

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Abstract

The invention relates to the technical field of lithium battery materials, in particular to a preparation method and application of a ZnSnO3 / NC composite material. According to the preparation method, pyrrole is used as a carbon source, the pyrrole and ZnSnO3 are subjected to an in-situ polymerization method to obtain a ZnSnO3 / polypyrrole precursor, and then the ZnSnO3 / NC composite material with a uniform and coated structure is obtained through high-temperature carbonization. The ZnSnO3 / NC composite material prepared by the invention is prepared into an electrode, the electrode is further assembled into a lithium ion battery, the cycling stability is good, and the capacity is about 1040 mAh.g<-1> after cycling for 500 weeks under the current density of 0.1 A.g<-1>.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, in particular to a ZnSnO 3 Preparation method of / NC composite material and its application in lithium-ion battery electrode materials. Background technique [0002] Due to the vigorous development of the electric vehicle industry, the development of power lithium-ion batteries with high energy density and power density is a hot spot in the research and development of the battery industry. SnO 2 Based on the composite oxide material has the advantages of high specific capacity and high power density, it is considered to be a very potential negative electrode material for lithium-ion batteries. Among them, the perovskite semiconductor ZnSnO 3 Because of its high theoretical capacity (1317mAh g -1 ), wide working potential, morphological diversity, and abundance in soil, it is considered to be one of the most promising next-generation high-energy-density anode materials. More...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/362H01M4/625H01M4/48H01M10/0525Y02E60/10
Inventor 王锋刘志杰丁瑜余链杨宇航
Owner HUBEI ENG UNIV
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