Layered arrangements of lithium cells

A battery and stack technology, applied in the field of negative electrodes, can solve the problem of lack of effective mechanism to protect lithium negative electrodes
CN1415124AInactive Publication Date: 2003-04-30POLYPLUS BATTERY CO INC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
POLYPLUS BATTERY CO INC
Publication Date
2003-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method employing a bonding layer is used to form active metal electrodes having barrier layers. Active metals such as lithium are highly reactive in ambient conditions. The method involves fabricating a lithium electrode or other active metal electrode without depositing the barrier layer on a layer of metal. Rather a smooth barrier layer is formed on a smooth substrate such as a web carrier or polymeric electrolyte. A bonding or alloying layer is formed on top of the barrier layer. Lithium or other active material is then attached to the bonding layer to form the active metal electrode. A current collector may also be attached to the lithium or active metal during the process.
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Description

Background of the invention

[0001] The present invention relates to negative electrodes used in batteries (such as lithium electrodes used in lithium-sulfur batteries). More specifically, the present invention relates to the preparation of alkali metal electrodes with thin barrier layers.

[0002] In theory, certain alkali metal electrodes could provide very high energy density batteries. Lithium becomes particularly suitable as a battery electrode element due to its low equivalent weight. Lithium provides more energy per volume than conventional battery standards, nickel and cadmium. Regrettably, few rechargeable lithium metal batteries have found success in the market. Lithium metal battery technology has not yet reached its potential.

[0003] Rechargeable lithium metal batteries fail mainly because of battery cycling problems. During repeated charge and discharge cycles, lithium "dendrites" gradually grow from the lithium metal electrode, pass through the electrolyte,...

Claims

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