CN109892039B - A kind of Thermal Cell Cathode Material - Google Patents
A kind of Thermal Cell Cathode Material Download PDFInfo
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- CN109892039B CN109892039B CN200710081151.4A CN200710081151A CN109892039B CN 109892039 B CN109892039 B CN 109892039B CN 200710081151 A CN200710081151 A CN 200710081151A CN 109892039 B CN109892039 B CN 109892039B
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Abstract
A kind of multicomponent alloy being made of lithium, boron, carbon and magnesium, wherein boron content is 22%-32%, carbon content 4%-10%, content of magnesium 1%-5%.Remaining is lithium.Using the present invention, solve the problems, such as that exothermic reaction is difficult to control in traditional two-spot lithium boron alloy preparation process, is conducive to the stability of alloy structure, the control of uniformity is conducive to the expansion that alloy prepares batch, is conducive to the reduction of alloy preparation cost.
Description
The present invention relates to a kind of Thermal Cell Cathode Materials, especially Li-B system thermal cell cathode for technical field
Material.
Background technique Thermal Cell Cathode Material Li-B-C-Mg series alloy is in Li-B binary alloy base
The novel alloy series developed on plinth.Li-B alloy is each so far in Thermal Cell Cathode Material system
The good negative electrode material of aspect best performance, its specific capacity highest, current potential is minimum, especially excellent height
Specific power characteristic makes thermal cell comprehensive performance be greatly enhanced.Although material property is extremely excellent,
However pass through the research and development of many decades, in the world not by material functionization.Its reason is to want acquired
The stable material of energy is extremely difficult.
United States Patent (USP) US Pat.4,110,111 disclose the technology of preparing of two-spot Li-B alloy, with crystalline boron
Particle and pure metal lithium ingot are raw material, stir between 300-500 DEG C after heating, allow it at 330 DEG C and 530
DEG C or so carry out exothermic reaction twice, formed using Li-B compound as skeleton, lithium metal is adsorbed in hole
A kind of composite material.Its deficiency is in first time exothermic reaction or thereafter soon, due to part
Thermal balance unstability is easy to cause second of exothermic reaction progress ahead of time, leads to thermal runaway.Thus material is aobvious
The uniformity of micro-assembly robot and the stability of material final performance cannot all control.
Summary of the invention
In order to reduce the severe degree of reactant reaction, the powder of boracic is enable sufficiently uniformly to immerse lithium liquid
Among, there are bigger time interval and temperature interval to control the thermal response in synthesis process, to make
The alloy of synthesis has stable structure and performance, and synthesis batch can dramatically increase, and the present invention provides a kind of heat
Cell negative electrode material.
A kind of Thermal Cell Cathode Material, Ingredient Wt percentage are B:20-32%, C:4-10%, Mg:
1-5%, surplus are lithium.Its object phase composition is Li-Mg solid solution, LiB compound, LiBCization at room temperature
Close object, be higher than the fusing point of lithium metal at a temperature of (180 DEG C of >) can by the skeleton that LiB and LiBC are formed
To adsorb Li-Mg metal liquid well.
Compared with prior art, the present invention having the following characteristics that
Single batch amount is synthesized to improve.It is to use lithium boron binary system in United States Government report in 1984, they
Only to 400 grams/furnace, and performance is unstable.After lithium boron carbon magnesium quaternary system, ingot blank has reached 2300
Gram/furnace, properties of product stabilization.From the point of view of the controllability of reaction, there are also further expansions for alloy list batch amount
Space.
Stability of material improves.The thermal stability of alloy is stablized, and discharge performance is stablized, and alloy is even in 210g
Acceleration under can steadily discharge, solve the problems, such as that the previous series material performance is unstable.
Specific embodiment
Embodiment 1
1 presses Li-xB-yC-zMg ingredient, wherein x=28, y=5, z=3.5,
2 heating in inert atmosphere (vacuum, argon gas), start to stir after waiting lithium metals all to melt.
3 warmings while stirring stop stirring when the viscosity height of alloy is difficult to stirring.
4 continue to heat up, and alloy generates fulminant exothermic reaction before 650 DEG C, at 720 DEG C after reaction
Heat preservation a period of time.
By cogging after the taking-up of 5 ingot blanks, 800 DEG C or less are heat-treated, and finish rolling meets user's requirement at size
Alloy strip steel rolled stock.
Resulting materials can steadily discharge for assembling thermal cell under the conditions of being higher than 150g acceleration.
Claims (1)
1. a kind of Thermal Cell Cathode Material, it is characterised in that: Ingredient Wt percentage is B:20-32%, C:
4-10%, Mg:1-5%, surplus are lithium；At room temperature, object phase composition is Li-Mg solid solution, LiBization
Object and LiBC compound are closed, being higher than the at a temperature of bone that is made of LiB and LiBC of the fusing point of lithium metal
Frame can adsorb Li-Mg metal liquid well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710081151.4A CN109892039B (en) | 2007-04-11 | 2007-04-11 | A kind of Thermal Cell Cathode Material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710081151.4A CN109892039B (en) | 2007-04-11 | 2007-04-11 | A kind of Thermal Cell Cathode Material |
Publications (1)
| Publication Number | Publication Date |
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| CN109892039B true CN109892039B (en) | 2010-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710081151.4A Active CN109892039B (en) | 2007-04-11 | 2007-04-11 | A kind of Thermal Cell Cathode Material |
Country Status (1)
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| CN (1) | CN109892039B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288713A (en) * | 2017-12-29 | 2018-07-17 | 海南大学 | A kind of lithium ion battery electrode material lithium boron carbon LiBC and its preparation method and application |
| CN110233258A (en) * | 2019-06-20 | 2019-09-13 | 湖南锐林新能源科技有限公司 | A kind of thermal cell modified lithium boron alloy composite negative pole material and preparation method thereof |
-
2007
- 2007-04-11 CN CN200710081151.4A patent/CN109892039B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108288713A (en) * | 2017-12-29 | 2018-07-17 | 海南大学 | A kind of lithium ion battery electrode material lithium boron carbon LiBC and its preparation method and application |
| CN108288713B (en) * | 2017-12-29 | 2020-07-07 | 海南大学 | Lithium boron carbon LiBC (lithium boron carbon) electrode material for lithium ion battery as well as preparation method and application of LiBC |
| CN110233258A (en) * | 2019-06-20 | 2019-09-13 | 湖南锐林新能源科技有限公司 | A kind of thermal cell modified lithium boron alloy composite negative pole material and preparation method thereof |
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| DC01 | Secret patent status has been lifted |