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Novel Co(OH)F lithium ion battery negative electrode material and preparation method thereof

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of electrochemical performance research that has not been reported, and achieve the effects of promoting chemical reactions, high capacity, and easy operation

Active Publication Date: 2014-10-29
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on the electrochemical performance of Co(OH)F materials

Method used

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  • Novel Co(OH)F lithium ion battery negative electrode material and preparation method thereof
  • Novel Co(OH)F lithium ion battery negative electrode material and preparation method thereof
  • Novel Co(OH)F lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh cobalt acetate, sodium fluoride, and hexamethylenetetramine in a molar ratio of 1:1:5, place in a beaker, add distilled water, stir evenly, transfer to a water heating axe, and react at 120°C for 24 hours. The reaction product was cleaned by centrifugation with alcohol and distilled water, and transferred to a petri dish to dry to obtain a sample. The results show that the prepared samples are located at 20.9°, 32.3°, 33.5°, 34.7°, 35.6°, 38.8°, 39.9°, 43.6°, 51.9°, 52.8°, 56.9°, 59.1° and 61.6° through XRD pattern analysis o The diffraction peaks at the orthorhombic Co(OH)F (110), (310), (201), (400), (111), (211), (410), (311), (221) , (420), (511), (002) and (601) corresponding to crystal planes, consistent with XRD card JCPDS, no. 50-0827. The prepared samples were characterized by SEM, as figure 2 As shown in (a), it consists of a large number of microrods with a length distribution of 1–5 μm. Depend on figure 2 (b) It can be seen that the diameter dis...

Embodiment 2

[0021] Weigh cobalt acetate, sodium fluoride and glucose in a molar ratio of 1:1;1, place in a beaker, add distilled water and stir evenly, transfer to a hot water ax and react at 120°C for 24 hours, centrifuge the reaction product with alcohol and distilled water Wash and transfer to a petri dish to dry the obtained samples. Shown by XRD pattern analysis, such as Figure 4 As shown, the main component of the obtained sample is still orthorhombic Co(OH)F (JCPDS, no. 50-0827), and the diffraction peaks at 23° and 46.7° indicate that the prepared sample contains a small amount of cobalt carbon oxides Impurities. The prepared samples were characterized by SEM, as Figure 5 As shown in (a), it consists of a large number of irregular particles. Depend on Figure 5 (b) It can be seen that the average size of the particles is about 500 nm.

Embodiment 3

[0023] Weigh cobalt acetate and sodium fluoride at a ratio of 1:1, place in a beaker and add distilled water to stir evenly, transfer to a hydrothermal ax and react at 120°C for 24 hours, wash the reaction product with alcohol and distilled water, and transfer to a petri dish The samples were obtained by drying in medium. Shown by XRD pattern analysis, such as Figure 6 As shown, the obtained sample is NaCoF 4 and NaCoF 3 mixture.

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Abstract

The invention provides a novel lithium ion battery negative electrode material. The negative electrode material is rod-shaped; the length of a rod is 1-5 microns, and the diameter of the rod is 100 nanometers-1 micron. A preparation method of the rod-shaped Novel Co(OH)F lithium ion battery negative electrode material comprises the following steps: carrying out chemical reaction on cobaltous acetate, sodium fluoride and hexamethylenetetramine or glucose which are used as basic raw materials under the hydrothermal condition so as to obtain the rod-shaped Novel Co(OH)F lithium ion battery negative electrode material. A synthesis method of the negative electrode material is simple and easy to operate; a prepared sample is micro rod-shaped; the length of the micro rod is 1-5 microns, and the diameter of the micro rod is 100 nanometers-1 micron.

Description

technical field [0001] The invention relates to a preparation method of a novel lithium ion battery negative electrode material, in particular to a preparation method of a rod-shaped Co(OH)F lithium ion battery negative electrode material, belonging to the field of new electrochemical materials. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high specific capacity, large specific power, stable charge and discharge potential curve, long cycle life, no memory effect, small self-discharge, and environmental friendliness. The third generation of small batteries are widely used in mobile portable devices such as notebook computers and mobile phones. In addition, lithium-ion batteries are also considered to be an ideal power source for future electric vehicles. In the future, the research direction of lithium-ion batteries will mainly focus on the development of high specific energy and high-power lithium-ion batteries, and the ke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525
CPCH01M4/1315H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 倪世兵吕小虎杨学林
Owner CHINA THREE GORGES UNIV
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