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Nano anode material for lithium-ion primary battery and preparation method thereof

A negative electrode material, lithium-ion technology, applied in the field of nano-negative electrode materials for lithium-ion primary batteries and its preparation, can solve problems that cannot meet the needs of large-scale energy storage facilities

Inactive Publication Date: 2019-05-24
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Li 4 Ti 5 o 12 It has many advantages when used as the negative electrode of lithium batteries, but its theoretical specific capacity is only 175 mAh / g, which still cannot meet the application needs of large-scale energy storage facilities

Method used

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  • Nano anode material for lithium-ion primary battery and preparation method thereof
  • Nano anode material for lithium-ion primary battery and preparation method thereof
  • Nano anode material for lithium-ion primary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Said lithium-ion primary battery uses a nano negative electrode material of Li 4 Nb 3 o 8 nanofibers; the Li 4 Nb 3 o 8 Preparation of nanofibers with ethanol

[0023] Niobium, lithium acetylacetonate and polyvinylpyrrolidone are used as reactant raw materials, and a mixed solution composed of ethanol and acetic acid is used as a solvent.

[0024] The preparation method of described lithium-ion primary battery nano negative electrode material, comprises the following steps:

[0025] (1) Preparation of electrospinning precursor solution: First, dissolve 1g of niobium ethoxide, 0.11g of lithium acetylacetonate and 0.5g of polyvinylpyrrolidone in a mixed solution consisting of 4ml of analytically pure ethanol and 2ml of analytically pure acetic acid, and stir for 5 hours to obtain Electrospinning precursor solution;

[0026] (2) Preparation of Li 4 Nb 3 o 8 Nanofiber: Pour the electrospinning precursor obtained in step (1) into a syringe for electrospinning

[0...

Embodiment 2

[0034] The preparation method of described lithium-ion primary battery nano negative electrode material, comprises the following steps:

[0035](1) Preparation of electrospinning precursor solution: First, dissolve 1.5g of niobium ethoxide, 0.11g of lithium acetylacetonate and 0.5g of polyvinylpyrrolidone in a mixed solution consisting of 4ml of analytically pure ethanol and 2ml of analytically pure acetic acid, and stir for 5 hours Obtain the electrospinning precursor solution;

[0036] (2) Preparation of Li 4 Nb 3 o 8 Nanofiber: Pour the electrospinning precursor obtained in step (1) into a syringe for electrospinning

[0037] Silk, spinning conditions are: receiving distance 12cm, spinning voltage 12kV, spinning speed is 0.5mh / h; then the collected

[0038] Li 4 Nb 3 o 8 Nanofibers, where the heating rate is 3°C

[0039] / min for heat treatment.

[0040] Li will be prepared 4 Nb 3 o 8 The nanofibers, the conductive agent and the binder were placed in a mortar ac...

Embodiment 3

[0044] The preparation method of described lithium-ion primary battery nano negative electrode material, comprises the following steps:

[0045] (1) Preparation of electrospinning precursor solution: First, dissolve 1g of niobium ethoxide, 0.15g of lithium acetylacetonate and 0.5g of polyvinylpyrrolidone in a mixed solution consisting of 4ml of analytically pure ethanol and 2ml of analytically pure acetic acid, and stir for 5 hours to obtain Electrospinning precursor solution;

[0046] (2) Preparation of Li 4 Nb 3 o 8 Nanofiber: Pour the electrospinning precursor obtained in step (1) into a syringe for electrospinning

[0047] Silk, spinning conditions are: receiving distance 12cm, spinning voltage 12kV, spinning speed is 0.5mh / h; then the collected

[0048] Li 4 Nb 3 o 8 Nanofibers, where the heating rate is 3°C

[0049] / min for heat treatment.

[0050] Li will be prepared 4 Nb 3 o 8 The nanofibers, the conductive agent and the binder were placed in a mortar acco...

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Abstract

The invention belongs to the technical field of lithium-ion batteries, and specifically relates to a nano anode material for a lithium-ion primary battery and a preparation method thereof. The nano anode material is Li4Nb3O8 nanofibers. The nano anode material takes niobium ethoxide [Nb(OC2H5)5], lithium acetylacetonate (LAA) and polyvinylpyrrolidone (PVP) as raw materials, takes a mixed solutionof ethanol and acetic acid as a solvent and takes the Li4Nb3O8 nano fibers grown by electrostatic spinning as an anode material. Meanwhile, the preparation method is a controllable preparation methodof the Li4Nb3O8 nano fibers.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a nano negative electrode material for a lithium ion primary battery and a preparation method thereof. Background technique [0002] As a high-performance green chemical power source, lithium-ion primary batteries have been widely used in the portable mobile electronics market and electric vehicles. Graphite materials meet most of the requirements as an ideal anode material, namely, low potential, stability to Electronics and lithium ions have good conductivity and are environmentally friendly, and are currently widely commercialized negative electrode materials. However, the relatively low energy density and power density of graphite anode materials cannot meet the needs of the next generation of high-performance lithium-ion batteries, and the development of high-performance anode materials for lithium-ion primary batteries has become a very urgent task...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/48H01M10/0525D01D5/00D01D10/02B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 王新张晓敏
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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