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Method for preparing copper selenide lithium ion battery electrode material

A technology for lithium ion batteries and electrode materials, which is applied in the field of preparation of electrode materials for copper selenide lithium ion batteries, can solve the problems of low output, unfavorable expansion of production, expensive raw materials, etc. simple effect

Inactive Publication Date: 2014-06-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing copper selenide lithium-ion battery electrode materials in order to solve the problems of expensive raw materials, low output, and unfavorable expansion of production for the existing preparation of lithium-ion battery electrode materials

Method used

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  • Method for preparing copper selenide lithium ion battery electrode material
  • Method for preparing copper selenide lithium ion battery electrode material
  • Method for preparing copper selenide lithium ion battery electrode material

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of a kind of copper selenide lithium ion battery electrode material of this embodiment, realizes according to the following steps:

[0022] 1. Add 0.08-0.10g of Na 2 SeO 3 , 0.16~0.20g of Cu(CH 3 COO) 2 Dissolve 0.15-0.25g of NaOH in a mixed solvent of 9-11mL ethylene glycol and 19-21mL deionized water, then place it on a magnetic stirrer and stir for 30-60min at a stirring speed of 4000-8000r / min to obtain a mixture A;

[0023] 2. Add 1-3mL of hydrazine into mixture A and stir evenly to obtain mixed solution B;

[0024] 3. Add the mixed solution B into a high-pressure reactor lined with polytetrafluoroethylene, seal it, and then heat-treat it at a temperature of 130-200°C for 6-24 hours, and cool it naturally to room temperature to obtain Cu 2-x Se electrode material precursor;

[0025] Fourth, the Cu 2-x Filtrate the precursor of the Se electrode material, then wash it for 3 to 6 times, and then vacuum dry it for ...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, 0.09g of Na 2 SeO 3 , 0.18g of Cu(CH 3 COO) 2 and 0.2 g of NaOH were dissolved in a mixed solvent of 10 mL of ethylene glycol and 20 mL of deionized water. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0031] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, it is placed on a magnetic stirrer and stirred at a stirring speed of 6000 r / min for 45 min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing a copper selenide lithium ion battery electrode material, belongs to the field of a selenide lithium ion battery electrode material in functional materials, and aims at solving the problems that an existing method for preparing the lithium ion battery electrode material is expensive in raw material, low in yield, and not beneficial to expanded production. The method comprises the following steps: 1, dissolving Na2SeO3, Cu(CH3COO)2 and NaO into a mixed solvent of ethylene glycol and deionized water, so as to obtain a mixture A; 2, adding diamine to the mixture, so as to obtain a mixed solution B; 3, adding the mixed solution B to a high-pressure reaction kettle and carrying out thermal treatment, so as to obtain a Cu2-xSe electrode material precursor; 4, filtering, washing and drying to obtain the copper selenide lithium ion battery electrode material. According to the method, high temperature is not needed, the used raw material is simple, cheap and available, reaction pressure is small, the obtained Cu2-xSe electrode material is good in degree of crystallization, the purity can be up to over 99%, the yield can be up to 94%, and the expanded production is facilitated.

Description

technical field [0001] The invention belongs to the field of selenide lithium ion battery electrode materials in functional materials, and in particular relates to a preparation method of copper selenide lithium ion battery electrode materials. Background technique [0002] Due to their high theoretical capacity, high energy density, and high voltage, transition metal dichalcogenides have attracted widespread attention and are expected to become anode materials for next-generation lithium-ion batteries. Among them, copper-based chalcogenide nanocrystals and their alloys have been widely studied due to their non-toxicity and low cost. Due to Cu 2 O and Cu 2 Both S have excellent electrochemical properties, and the electrochemical properties of copper selenide, another chalcogenide of copper, are still rarely reported. Copper-selenium compound ultrafine particles are widely used in solar cells, superionic conductors, optical filters, thermoelectric converters and other fiel...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01B19/04
CPCC01B19/04H01M4/581H01M10/0525H01M2004/021Y02E60/10
Inventor 陈刚陈大宏张永强徐海明
Owner HARBIN INST OF TECH
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