Alloy composition for lithium ion batteries

A technology of lithium ion battery and composition, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as reduction of electrical contact capacity

Active Publication Date: 2008-07-30
JOHNSON MATTHEY PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Deterioration of electrical contact can in turn lead to capacity reduction after anode cycle life

Method used

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  • Alloy composition for lithium ion batteries
  • Alloy composition for lithium ion batteries
  • Alloy composition for lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Example 1: Si 60 Al 14 Fe 8 TiInSn 6 (MM) 10

[0095] Alloy composition Si 60 Al 14 Fe 8 TiInSn 6 (MM) 10 Prepared by mixing: 17.606g of silicon wafers, 3.947g of aluminum pellets, 4.668g of iron nuggets, 0.500g of sponge titanium, 7.441g of tin pellets, 1.200g of indium and 14.639g of misch metal nuggets . The mixture was fused together on a carbon hearth in an argon-filled electric arc furnace from Advanced Vacuum Systems, Ayer, MA. The resulting ingot has the composition Si 60 Al 14 Fe 8 TiSn 6 In Mm, the ingot was broken into pieces measuring about 1 cm in all directions.

[0096]The ingot was then further processed by melt spinning in a melt spinning apparatus comprising a vacuum chamber with a cylindrical quartz glass crucible (16 mm inner diameter and 140 mm length) with 0.35 mm holes located above the rotating cooling wheel. The rotating cooling wheel (10mm thick and 203mm diameter) is made of copper alloy (Ni-Si-Cr-Cu C18000 alloy, 0.45wt% chro...

Embodiment 2

[0102] Example 2: Si 60 al 14 Fe 8 TiIn 3 sn 4 (MM) 10

[0103] Using a procedure similar to that in Example 1, the alloy composition Si was prepared by mixing 60 al 14 Fe 8 TiIn 3 sn 4 (MM) 10 : 17.634g of silicon wafer, 3.953g of aluminum shot, 4.675g of iron block, 0.501g of sponge titanium, 4.969g of tin shot, 3.605g of indium and 14.663g of misch metal. The resulting melt-spun ribbon was annealed by heating at 200° C. for 2 hours under flowing argon. Figure 3 shows the XRD pattern.

[0104] The resulting alloy composition was tested in the electrochemical cell described in Example 1. Electrochemical cells were prepared using the procedure described in Example 1. The voltage versus capacity curve for this material is shown in FIG. 4 . The reversible specific capacity is 950mAh / g.

Embodiment 3

[0105] Example 3: Si 59 al 16 Fe 8 In 1 sn 6 (MM) 10

[0106] Using a procedure similar to that in Example 1, the alloy composition Si was prepared by mixing 59 al 16 Fe 8 In 1 sn 6 (MM) 10 : 9.062g aluminum, 34.785g silicon, 9.379g iron, 2.410g indium, 14.949g tin and 29.414g misch. Melt spinning was performed at 1350°C.

[0107] 10 g of the melt-spun ribbon were annealed at 200° C. for 2 hours in a tube furnace under argon flow. The XRD pattern of the resulting alloy composition is shown in FIG. 5 .

[0108] To a 40 ml tungsten carbide grinding vessel comprising 2 carbide balls of 10 mm diameter and 10 tungsten carbide balls of 3 mm diameter were added the following components: 1.70 g of the upper melt-spun ribbon, 100 mg of SUPER P carbon (available from MMM Carbon , Belgium), 1.0 g of polyimide coating solution (commercially available from HD Microsystems, Cheesequake Rd, Parlin, NJ, trade name PYRALIN PI2555, 20 wt % N-methyl-2-pyrrolidone solution) and 5.2 ...

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Abstract

The present invention describes alloy compositions, lithium ion batteries, and methods of making lithium ion batteries. The lithium ion battery has an anode comprising an alloy composition comprising: a) silicon, b) aluminum, c) transition metal, d) tin, e) indium, and f) a sixth element, the sixth element Including: yttrium, lanthanides, actinides, or combinations thereof. The alloy composition is a mixture of an amorphous phase comprising silicon and a crystalline phase comprising 1) tin, 2) indium, and 3) an intermetallic compound of a sixth element.

Description

[0001] related application [0002] This application claims priority to U.S. Provisional Application No. 60 / 702,241, filed July 25, 2005, and U.S.S.N. 11 / 387,205, filed March 23, 2006, the disclosures of which are hereby incorporated by reference to this article. field of invention [0003] The present invention describes alloy compositions for use in lithium-ion batteries. Background technique [0004] Rechargeable lithium-ion batteries are included in a variety of electronic devices. Most commercially available lithium-ion batteries have an anode that includes a material, such as graphite, that is capable of incorporating lithium during charging through an intercalation mechanism. Such embedded anodes generally exhibit good cycle life and Coulombic efficiency. However, the amount of lithium that can be incorporated per unit mass of intercalation type material is relatively low. [0005] A second class of anode materials is known to incorporate lithium during charging t...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/48H01M4/02H01M4/40H01M4/04H01M4/134H01M4/1395
CPCH01M4/134H01M4/1395H01M4/38H01M4/621Y02E60/122Y02E60/10H01M4/48H01M4/02H01M4/40
Inventor 马克·N·奥布罗瓦茨莱夫·克里斯滕森
Owner JOHNSON MATTHEY PLC
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