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Lithium ion secondary battery negative pole and its preparing method and lithium secondary battery including said negative pole

A secondary battery and lithium-ion technology, applied in the direction of secondary batteries, electrode manufacturing, battery electrodes, etc., can solve the problems of low volume specific energy, small tap density, limiting specific capacity of lithium-ion secondary batteries, etc., to achieve improved The effect of volume specific energy, high tap density, and specific capacity improvement

Inactive Publication Date: 2006-03-22
陈冠宗 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What current commercial lithium-ion secondary battery anode material usually adopts is graphite carbon material, and its shortcoming is: 1), its theoretical specific capacity is only 372mAh / g, thereby has limited the further improvement of specific capacity of lithium-ion secondary battery; 2) The small tap density results in low volume specific energy, and its tap density is generally 0.8g / cm 3

Method used

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  • Lithium ion secondary battery negative pole and its preparing method and lithium secondary battery including said negative pole
  • Lithium ion secondary battery negative pole and its preparing method and lithium secondary battery including said negative pole
  • Lithium ion secondary battery negative pole and its preparing method and lithium secondary battery including said negative pole

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Embodiment 1

[0021] Put 5 grams of black phosphorus powder of 200 mesh sieves into 100 milliliters of strong oxidizing agent concentration and be 10% nitric acid (HNO 3 ) solution at room temperature for 10 hours, and then washed with distilled water, and then placed in a drying oven at 120 ° C for 12 hours to dry. Then take vinylidene fluoride as binder, N-methylpyrrolidone as organic solvent, and acetylene black as conductive agent, mix and stir the slurry evenly according to the ratio of black phosphorus: acetylene black: vinylidene fluoride=90:4:6 Coated on the current collector copper foil, and dried at 120°C for 16 hours. Then immerse in any ratio of lithium-containing compound n-butyllithium / ethane solution for 12 hours, then wash with dimethoxyethane, put it into a vacuum drying oven, heat up to 160°C, and keep it warm for 48 hours to get this product. Invention of the required lithium ion secondary battery negative electrode.

[0022] The lithium ion secondary battery negative e...

Embodiment 2

[0024] The negative electrode of the lithium ion secondary battery prepared above, the positive electrode material is lithium manganate, the electrolyte is lithium hexafluoroborate, the solvent is ethylene carbonate and diethyl carbonate with a volume ratio of 1:3, and the diaphragm is CeLgrd2300 microporous membrane , made of 063048 batteries. , The measured capacity of the battery is 1345mAh.

Embodiment 3

[0026] With the lithium ion secondary battery negative electrode that above-mentioned makes, anode material is lithium nickelate, electrolytic solution is lithium chlorate, solvent solvent is ethylene carbonate and diethyl carbonate, volume ratio is 1: 1, diaphragm is CeLgrd2300 micron The porous film is made into a 063048 battery, and the measured capacity of the battery is 1425mAh.

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Abstract

This invention discloses the negative of a Li ionic secondary battery, its preparation method and the battery containing said negative, among which, the negative includes: rhombic black phosphorus with orthogonal structure applied by an inorganic solid electrolyte crystal film in 20-5000 artificially

Description

technical field [0001] The invention relates to a negative pole of a lithium ion secondary battery, a preparation method thereof, and a lithium ion secondary battery containing the negative pole. In particular, it relates to an artificially applied inorganic solid electrolyte crystalline film, the crystalline film has good lithium ion conductivity and can form an effective SEI film negative pole of a lithium ion secondary battery with the existing lithium ion carbonate electrolyte Preparation method and lithium ion secondary battery comprising the negative electrode. Background technique [0002] Today's society is a society where information is developing rapidly, and fast, accurate, and massive storage and transmission of information are the requirements of the information age. The development of portable electronic devices such as mobile phones, notebook computers, and handheld computers has put forward higher requirements for lithium-ion secondary batteries with light w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/58H01M4/48H01M4/04H01M10/40H01M4/136H01M10/0525H01M10/36
CPCH01M4/5825Y02E60/122H01M4/136H01M10/0525Y02E60/10
Inventor 陈冠宗周俊杰张翠萍
Owner 陈冠宗
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