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Preparation method of anode material of Li-Se battery and lithium battery

A cathode material, lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low electric capacity, poor electrical stability, and unsatisfactory cyclability of cathode materials, and achieve high practical value, electric power. Good chemical stability, increasing the effect of intercalation and decoupling

Inactive Publication Date: 2012-08-01
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a Li-Se battery to solve the problems of low capacitance, complex synthesis, high price, unsatisfactory cycleability and poor electrical stability of the existing lithium-ion battery cathode materials

Method used

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  • Preparation method of anode material of Li-Se battery and lithium battery
  • Preparation method of anode material of Li-Se battery and lithium battery
  • Preparation method of anode material of Li-Se battery and lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Porous elemental selenium microspheres

[0024] 1. Preparation of cathode materials for lithium batteries. Microspheres of elemental selenium were synthesized on carbon cloth by gas phase method, such as figure 2 As shown, compared with the pure carbon cloth, there is an obvious layer of microspheres grown on the carbon cloth.

[0025] The preparation steps are as follows:

[0026] (1) take selenium powder and put into porcelain boat, porcelain boat is put into the quartz tube in the horizontal tube furnace;

[0027] (2) Clean and dry the substrate carbon cloth or aluminum foil, and place the substrate in the downstream low temperature area of ​​the quartz tube;

[0028] (3) feed nitrogen for 20 minutes, and exhaust the air in the quartz tube;

[0029] (4) Adjust the nitrogen flow rate to 100 sccm, heat the tube furnace to 400°C-800°C, and keep it warm for 30min-60min.

[0030] (5) After the heat preservation of the tube furnace is completed and the ...

Embodiment 2

[0035] Embodiment 2 Selenium nanowires

[0036] (1) take selenium powder and put into porcelain boat, porcelain boat is put into the quartz tube in the horizontal tube furnace;

[0037] (2) Clean and dry the substrate copper foil, vapor-deposit a layer of gold on the substrate, and place the substrate in the downstream low temperature zone of the quartz tube;

[0038] (3) Pass in argon gas for 20 minutes, and exhaust the air in the quartz tube;

[0039] (4) Adjust the nitrogen flow rate to 20 sccm, heat the tube furnace to 250°C-400°C, and keep it warm for 30min-60min.

[0040] (5) After the heat preservation of the tube furnace is completed and the temperature drops to room temperature, take out the substrate.

Embodiment 3

[0041] Embodiment 3 Selenium nanobelts

[0042] (1) take selenium powder and put into porcelain boat, porcelain boat is put into the quartz tube in the horizontal tube furnace;

[0043] (2) cleaning and drying the nickel foam on the substrate, vapor-depositing a layer of gold on the substrate, and placing the substrate in the downstream low temperature zone of the quartz tube;

[0044] (3) feed nitrogen for 20 minutes, and exhaust the air in the quartz tube;

[0045] (4) Adjust the nitrogen flow rate to 20 sccm, heat the tube furnace to 400°C-600°C, and keep it warm for 30min-60min.

[0046] (5) After the heat preservation of the tube furnace is completed and the temperature drops to room temperature, take out the substrate.

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Abstract

The invention discloses a Li-Se battery. The anode material of the Li-Se battery is elemental selenium, the elemental selenium can be porous elemental selenium microspheres, a selenium nano-wire or a selenium nano-ribbon. The invention also provides a thermal evaporation method for growing of the anode material. The Li-Se battery prepared by the method provided by the invention has favorable stability, and the specific capacitance of the battery is 900 mAh / g after the battery is repeatedly charged and discharged 100 times. The Li-Se battery disclosed by the invention can effectively solve the problems of low capacitance, complexity of synthesis, expensive cost, undesirable circulation, and poor electrical stability of the existing lithium ion battery, and has the advantages of simpleness in battery package, high efficiency, rapidness, low cost of raw materials and high practical applicability; and moreover, the Li-Se battery is suitable for being popularized.

Description

technical field [0001] The invention belongs to the field of energy storage, and in particular relates to a preparation method of a Li-Se battery and a cathode material of a lithium battery. Background technique [0002] With the rapid development of communications, electronic equipment, electric vehicles and space technology, the performance of batteries is increasingly demanding. It is of great significance to develop new lithium-ion batteries with high specific capacity, low cost and environmental friendliness. It is well known that the development and application of new electrode materials is very important for safe and effective electrochemical energy storage. In the lithium battery system, the development of positive electrode materials has always restricted the pace of lithium battery progress. Lithium batteries generally include four parts including positive electrode, negative electrode, diaphragm and electrolyte. Traditional positive electrode materials such as l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 沈国震王显福陈娣刘彬
Owner HUAZHONG UNIV OF SCI & TECH
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