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Multi-element alloy compound anode material, preparation method and lithium ion battery containing compound anode material

A technology of negative electrode material and multi-element alloy, applied in the application field of negative electrode material of lithium ion battery, can solve the problems of difficult industrialization, poor long-term cycle performance, excessive expansion, etc., to reduce material expansion, improve rate and cycle performance, improve The effect of cycle life

Active Publication Date: 2018-01-26
BTR NEW MATERIAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods can improve the cycle performance to a certain extent, but there are still many problems, such as poor long-term cycle performance, excessive expansion or difficulty in industrialization, etc.

Method used

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  • Multi-element alloy compound anode material, preparation method and lithium ion battery containing compound anode material
  • Multi-element alloy compound anode material, preparation method and lithium ion battery containing compound anode material
  • Multi-element alloy compound anode material, preparation method and lithium ion battery containing compound anode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] (1) Be that 50nm nano-silicon 10g, nano-germanium 5g, and nano-tin 5g are mixed evenly and placed in a rotary kiln with a median particle size of 50nm, and the air is ventilated to carry out high-temperature oxidation treatment. 0.5h to obtain nano-oxides (i.e., nano-silicon with oxide layer, nano-germanium with oxide layer and nano-tin with oxide layer), which are then uniformly dispersed in absolute ethanol, ultrasonically dispersed for 1h, and then heated in a nitrogen atmosphere 2 g of γ-methacryloxypropyltrimethoxysilane aqueous solution with a mass fraction of 90% was added under stirring, and reacted for 24 hours to obtain an alkylated nano-silicon suspension (i.e., realized alkylation), Slowly add 5g styrene in the stirring process, after adding, add 0.1g benzoyl peroxide and carry out polymerization reaction 10h as initiator, obtain surface macromolecule polymerization coating nano-silicon suspension (promptly realize macromolecular polymer coating Covering tre...

Embodiment 2

[0110] (1) The median particle size is 50nm nano-silicon 10g, nano-germanium 5g, and nano-tin 5g, mix uniformly, place in a rotary furnace, carry out high-temperature oxidation treatment with air, the air velocity control is 10sccm, heat treatment temperature 800 ℃, time is 2h to obtain the active nano-oxide, then uniformly disperse it in absolute ethanol, ultrasonically disperse for 1h, then add γ-methacryloyloxypropyl with a mass fraction of 90% under stirring in a nitrogen atmosphere Trimethoxysilane aqueous solution 2g, reaction 24h, obtains alkylated nano-silicon suspension (i.e. realized alkylation), slowly adds 5g styrene in stirring process, after adding, adds 0.1g benzoyl peroxide as The initiator was polymerized for 10 hours to obtain a nano-silicon suspension coated with polymer on the surface (i.e., the polymer coating treatment was realized, that is, the surface modification of the polymer), and then, under the action of ultrasonic stirring, a mass fraction of 5 %...

Embodiment 3

[0115] (1) The median particle size is 50nm nano-silicon 10g, nano-germanium 5g, and nano-tin 5g, mix uniformly, place in a rotary furnace, carry out high-temperature oxidation treatment with air, the air velocity control is 10sccm, heat treatment temperature 800 ℃, time is 0.5h to obtain the active nano-oxide, then uniformly disperse it in absolute ethanol, ultrasonically disperse for 1h, then add γ-methacryloxypropane with a mass fraction of 90% under stirring in a nitrogen atmosphere 2 g of trimethoxysilane aqueous solution, reacted for 24 hours, and obtained alkylated nano-silicon suspension (i.e. realized alkylation), slowly added 5 g of styrene during stirring, and added 0.1 g of benzoyl peroxide Carry out polymerization reaction 10h as initiator, obtain surface macromolecule polymerization coated nano-silicon suspension (that is to realize macromolecular polymer coating treatment, namely macromolecular surface modification), subsequently, add mass fraction under ultrason...

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Abstract

The invention relates to a porous multi-element alloy compound anode material, a preparation method and a lithium ion battery containing the compound anode material. The multi-element alloy compound anode material provided by the invention comprises modified nanometer active materials, graphene chips dispersed between the modified nanometer active materials and amorphous conductive carbon layers wrapped on the modified nanometer active materials and the graphene chips. The lithium ion battery prepared from the compound material provided by the invention has excellent circulating and rate capabilities, lower volume expansion effect and potential market application prospect. The preparation technology according to the invention is simple, controllable and suitable for industrial production.

Description

technical field [0001] The invention belongs to the application field of lithium-ion battery negative electrode materials, and relates to a multi-element alloy composite negative-electrode material, a preparation method thereof and a lithium-ion battery comprising the composite negative-electrode material, in particular to a porous multi-element alloy composite negative-electrode material, its preparation method and A lithium ion battery comprising the composite negative electrode material. Background technique [0002] Lithium-ion batteries have been widely used in electronic mobile terminals, digital products and portable mobile devices, electric vehicles and energy storage power stations due to their outstanding advantages such as high working voltage, good cycle performance, small self-discharge discharge, and large specific energy. and other fields. However, with the continuous needs of people's life, the energy density requirements of lithium-ion batteries are getting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 张长安何鹏任建国黄友元
Owner BTR NEW MATERIAL GRP CO LTD
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