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Micro-porous battery substrate

A substrate and battery technology, applied in the field of battery manufacturing, can solve problems such as poor cycle performance of lithium-containing batteries

Active Publication Date: 2018-07-31
GOOGLE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lithium-containing batteries have not yet fully realized their potential due to various challenges such as poor cycle performance and safety concerns

Method used

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Embodiment Construction

[0024] I. Summary

[0025] The present disclosure describes batteries having microporous current collectors or substrates configured to incorporate lithium metal within their pores. Thus, in some cases, specific anode materials such as graphite or silicon may not be required. That is, the microporous substrate can function in combination as an anode (eg, a reservoir of lithium metal) and as a highly conductive current collector.

[0026] The microporous substrate can improve the exchange of Li metal near the anode / collector interface. That is, the porous substrate structure can increase the volume in which lithium can be incorporated in the current collector. As a possible consequence, battery performance may be improved due to a higher lithium diffusion rate, especially during the battery's cycle life. Accordingly, the present disclosure may enable lithium-ion batteries to provide higher efficiency, higher power density, and / or better cycle life.

[0027] In example embod...

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Abstract

This disclosure relates to a battery and a method for its manufacture. An example method includes forming a substrate having a first surface, the first surface having a plurality of pores. The pores may be configured to house lithium metal. The method includes incorporating lithium metal into at least a portion of the plurality of pores. The lithium metal may be incorporated into the pores via a pre-lithiation process, which may include electroplating of lithium metal into the porous substrate. The method also includes forming an electrolyte disposed between the first surface of the substrateand a cathode. The electrolyte is configured to reversibly transport lithium ions via diffusion between the substrate and the cathode. The method also includes forming the cathode. Some embodiments may provide the substrate to jointly serve as an anode and electrically- conductive current collector.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application No. 14 / 817,184, filed August 3, 2015, the contents of which are hereby incorporated by reference. Background technique [0003] Batteries comprising lithium metal have a higher theoretical energy density than other batteries comprising alkali metal or nickel metal hydride materials. However, lithium-containing batteries have not yet fully realized their potential due to various challenges such as poor cycle performance and safety concerns. Therefore, there is a need to reduce Li metal loss due to irreversible surface reactions during charge / discharge, reduce dendrite growth at the anode / current collector interface during charge, and reduce surface expansion / contraction due to uneven plating of Li. . Contents of the invention [0004] A battery can include a substrate, a cathode, and an electrolyte. The substrate may be microporous. That is, the surface of th...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/04H01M4/80H01M4/525H01M10/052
CPCH01M4/0404H01M4/0407H01M4/044H01M4/0452H01M4/131H01M4/134H01M4/1395H01M4/382H01M4/525H01M4/661H01M4/74H01M4/742H01M4/80H01M4/808H01M6/40H01M10/0436H01M10/0525H01M10/0587H01M2004/021H01M2004/027Y02E60/10Y02P70/50
Inventor 黄太燮拉梅什·C·巴德瓦杰
Owner GOOGLE LLC
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