Electrode composition, method of making the same, and lithium ion battery including the same

An electrode composition, lithium-ion battery technology, applied in the direction of electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as complex and lengthy processes, and achieve the effect of relatively low cost, easy manufacture, and good operation

Inactive Publication Date: 2009-06-10
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic methods to make such alloys often involve complex and / or lengthy processes

Method used

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  • Electrode composition, method of making the same, and lithium ion battery including the same
  • Electrode composition, method of making the same, and lithium ion battery including the same
  • Electrode composition, method of making the same, and lithium ion battery including the same

Examples

Experimental program
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Effect test

example 1

[0081] Silicon powder (0.3 grams (g), Alfa Aisha, particle size = 1-20 microns) and 1.4 g MoSi 2 (Cerac Incorporated, Milwaukee, Wisconsin, Cerac Incorporated, Milwaukee, Wisconsin, particle size = -325 mesh) was placed in a 30 milliliter (mL) planetary micromill under the trade name "PLANETARY MICRO MILLPULVERISETTE 7" was obtained from Fritsch, Idar-Oberstein, Germany, equipped with a tungsten carbide container and 51 g of 5 mm tungsten carbide grinding media, milled for 1 hour under heptane at speed setting 6 . To this mixture was added 0.255 g of high specific surface area carbon, available under the trade designation "SUPER P" from Timcal, Brussels, Belgium. Then, a polyimide precursor solution (0.85 g, 20 wt% solids in N-methylpyrrolidone (NMP)) was added to the solid mixture, followed by an additional 3 g of NMP. The polyimide precursor solution was commercially available as The name "PYRALIN PI 2555" was obtained from HD Microsystems, Wilmington, Delaware. Then, the...

example 2

[0085] Silicon powder (0.3g, Alfa Aisha, particle size = 1-20 micron) and 2.08g WSi 2 (Alpha Aisha, particle size=-325 mesh) is placed in the planetary micro mill of 30 milliliters (mL), and planetary micro mill is obtained from Fritz Company with trade name " PLANETARY MICRO MILL PULVERISETTE 7 ", and it is equipped with Tungsten carbide container and 51g of 5mm tungsten carbide grinding media. The powder was milled under heptane at speed 10 for 2 hours. To this mixture was added 5.2 g of a 4.9% by weight dispersion of high surface area carbon in NMP, and 0.85 g of a polyimide precursor solution (20% by weight solids in NMP), high surface area carbon under the trade name "SUPER P" was obtained from Timcal Corporation, and the polyimide precursor solution was obtained from HD Microsystems under the trade designation "PYRALIN PI2555". The slurry was further mixed in a micromill at speed 3 for an additional 1 hour. The resulting slurry was coated onto nickel foil using a 5 mi...

example 3

[0088] Silicon powder (0.3g, Alfa Aisha, particle size = 1-20 micron) and 2.08g TSi 2(Alfa Aisha, particle size=-325 mesh) was placed in a 30 mL planetary micromill obtained from Fritz under the trade name "PLANETARY MICRO MILL PULVERISETTE 7" equipped with a tungsten carbide container and 51g of 5mm tungsten carbide grinding media. The powder was milled under heptane at speed 10 for 2 hours. In this mixture, add the dispersion of the high specific surface area charcoal of 4.9% by weight in NMP of 5.2g and 0.85g polyimide precursor solution (solid of 20% by weight in NMP), high specific surface area carbon is commercialized The name "SUPER P" is available from Tramicol Corporation, and the polyimide precursor solution is available from HD Microsystems under the trade designation "PYRALIN PI 2555". The slurry was further mixed in a micromill at speed 3 for an additional 1 hour. The resulting slurry was coated onto nickel foil using a 5 mil (0.1 mm) notched bar. The coated e...

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Abstract

An electrode composition for a lithium ion battery comprises a binder, electrochemically active particles, metallic conductive diluent particles, and non-metallic conductive diluent particles. The electrochemically active particles and the metallic conductive diluent particles do not share a common phase boundary, and are present in a molar ratio less than or equal to 3. Methods of making the electrode composition and lithium ion batteries using the same are also disclosed.

Description

Background technique [0001] Lithium-ion batteries generally have a negative electrode (anode), a counter electrode (cathode), and an electrolyte separating the anode and cathode. [0002] Anodes based on electrochemically active main group metals such as Sn, Si, Al, Bi, Ge or Pb for lithium-ion batteries are currently attracting considerable interest worldwide. Metal and alloy based anodes offer advantages over traditional graphite electrodes, such as increased energy density. [0003] In general, anodes based on electrochemically active metals exhibit the large volume changes that metals and their alloys undergo when they store lithium. The volume of the active metal or alloy containing the active metal can change by as much as 200% as the electrode undergoes charge and discharge. A great deal of activity in this field focuses on the synthesis of amorphous or amorphous alloys containing eg tin and silicon. Synthetic methods to make such alloys often involve complex and / or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/36H01M4/134H01M4/1395H01M10/0525H01M10/054H01M10/36
CPCH01M4/621Y02E60/122H01M4/625H01M4/622H01M10/054H01M4/626H01M4/1395H01M4/624H01M2004/021H01M4/134H01M10/0525Y02E60/10H01M4/04H01M4/38H01M4/62
Inventor 拉里·J·克劳斯洛维尔·D·詹森
Owner 3M INNOVATIVE PROPERTIES CO
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