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High performance anode material for lithium-ion battery

A lithium battery, anode technology, applied in the direction of lithium battery, battery electrode, nanotechnology for materials and surface science, etc., can solve problems such as battery capacity reduction

Active Publication Date: 2009-12-09
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This fresh surface area is not in contact with the substrate, and thus acts as if the tin particles were detached from the substrate, resulting in a reduction in battery capacity

Method used

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  • High performance anode material for lithium-ion battery
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  • High performance anode material for lithium-ion battery

Examples

Experimental program
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Embodiment 1

[0028] A typical synthetic procedure for UV polymers involves charging 1 g PC1000, 0.5 g PC2003, 0.2 g decalin (porogen), 2 g nitromethane (solvent) and 0.02 g photoinitiator into a tall quartz beaker and Stir vigorously mechanically for 30 minutes under light conditions. The mixture was then sonicated for 20 minutes using a VCX 750 Vibra-cell sonicator. With continuous stirring, the mixture was placed 10 cm away from the UV lamp in the UV box, and the UV irradiation was continued for 1-10 minutes. The solid content was then filtered off and washed with deionized water. Finally, the UV polymer was vacuum dried in an oven at 80 °C for 24 hours. exist image 3 The resulting structures demonstrating internal and external pores of the UV polymer are shown in .

Embodiment 2

[0030] exist Figure 4 A comparison of Sn nanoparticles with an unoptimized structure of Sn / polymer matrix material is shown in . As shown in this figure, the non-optimized structure of Sn / polymer matrix material shows good cycling stability. The composition of the tested Sn / PANI composite was 1:1 (by weight) and the electrode composition was Sn / PANI:carbon (electron conductive additive):SBR / CMC (6:4) (binder) = 8:1:1 (weight). Optimization of Sn / polymer matrix materials may include: 1) improving polymer:Sn ratio to improve capacity while maintaining good cycle life; 2) optimizing synthesis conditions for uniform pore size, etc.

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Abstract

An anode material with lithium-alloying particles contained within a porous support matrix is provided. The porous support matrix preferably has a porosity of between 5 and 80% afforded by porosity channels and expansion accommodation pores, and is electrically conductive. More preferably the support matrix has a porosity of between 10 and 50%. The support matrix is made from an organic polymer, an inorganic ceramic or a hybrid mixture of organic polymer and inorganic ceramic The organic polymer support matrix and can be made from a rod-coil polymer, a hyperbranched polymer, UV cross-linked polymer, heat cross-linked polymer or combination thereof. An inorganic ceramic support matrix can be made from at least one group IV-VI transition metal compound, with the compound being a nitride, carbide, oxide or combination thereof. The lithium-alloying particles are preferably nanoparticles with a mean linear dimension of between 5 and 500 nanometers, and more preferably have a mean linear dimension of between 5 and 50 nanometers.

Description

[0001] related application [0002] This application claims priority to US Patent Application No. 11 / 463,394, filed August 9, 2006, which is incorporated herein by reference. field of invention [0003] The present invention relates to lithium ion batteries, in particular high performance anode materials for lithium ion batteries. Background of the invention [0004] The energy requirements placed on batteries continue to increase, while limitations on volume and mass continue to exist. In addition, there is an increasing demand for safe, low-cost, and environmentally friendly materials. These requirements and battery specifications cannot be met using conventional lithium-ion battery chemistries. Although lithium-ion batteries have long been optimized and exhibit stable energy, these systems are limited by the amount of lithium that can be reversibly inserted into and removed from the battery's active material structure. [0005] The demands for greater performance, safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/26H01M4/02H01M4/134H01M10/052H01M10/36
CPCY02E60/122H01M4/62H01M4/134H01M10/052H01M4/621H01M2004/021H01M4/38H01M4/624H01M4/386H01M4/387Y02E60/10B82Y30/00H01M10/0525
Inventor 张璞马俊卿S·马尼M·理查德横石正次B·格洛姆斯基王丽雅尹世杰K·L·施塔姆C·西尔科夫斯基J·米勒李文
Owner TOYOTA JIDOSHA KK