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Template electrode structures for depositing active materials

A technology of active material and active material layer, applied in structural parts, battery electrodes, electrode manufacturing, etc., can solve problems such as insufficient elasticity

Active Publication Date: 2012-12-26
AMPRIUS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most polymeric adhesives are not elastic enough to accommodate the large expansion of some high volume materials

Method used

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  • Template electrode structures for depositing active materials
  • Template electrode structures for depositing active materials
  • Template electrode structures for depositing active materials

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Embodiment Construction

[0038] Nanostructures, especially nanowires, are exciting new materials for battery applications. It has been proposed that high-capacity electrode active materials can be developed into nanostructures and used without sacrificing battery performance. Even larger expansions during lithiation, such as observed in the case of silicon, do not degrade the structural integrity of the nanomaterial due to the small size. In other words, the nanostructures have a high surface area to volume ratio compared to conventional electrode morphologies. Additionally, a high surface area to volume ratio provides a greater percentage of active material that can directly contact electrochemically active ions from the electrolyte.

[0039] Embodiments are described herein with reference to nanowires. It should be understood, however, that nanowires as described herein are intended to include other types of nanostructures, including nanotubes, nanoparticles, nanospheres, nanorods, nanowhiskers, e...

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Abstract

Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and / or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application 61 / 310,183, filed March 3, 2010, entitled "Electrochemical Active Structures Containing Silicides," which is hereby incorporated by reference in its entirety for all purposes. This application is a continuation-in-part of US Patent Application 12 / 437,529, filed May 7, 2009, by Cui et al., entitled "ELECTRODE INCLUDING NANOSTRUCTURES FOR RECHARGEABLE CELLS." Background technique [0003] The demand for high capacity rechargeable batteries is strong and increasing every year. Many applications such as aerospace and aerospace, healthcare, portable electronics, and automotive applications require batteries with high gravimetric and / or volumetric capacity. Li-ion electrode technology offers some improvements in these areas. However, to date, lithium-ion batteries are mainly manufactured from graphite, which has a theoretical capacity of only 372mAh / g. [000...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/38H01M4/48H01M10/0525H01M4/131
CPCH01M4/667Y02E60/122H01M4/75H01M4/661H01M4/587H01M4/66H01M4/1395H01M4/38H01M4/366H01M4/134H01M10/0525H01M4/0428H01M4/386Y10T29/49108Y10T29/49115Y02E60/10H01M4/136H01M4/58
Inventor G·E·洛夫尼斯W·S·德尔哈根R·法兴韩松刘祖琴
Owner AMPRIUS INC