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Composite separator with aligned particles

A composite material, isolator technology, applied in the field of isolators, can solve problems such as short circuit, fire, and cause fire

Active Publication Date: 2016-04-13
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common liquid electrodes used in many batteries (e.g., lithium-ion batteries) can be flammable and in severe accidents can contribute to fires
If overcharging of a Li-ion battery occurs, lithium dendrites (lithiumdendrite) may grow at the negative electrode and pass through the porous separator, causing an internal short circuit
If the two electrodes come into electrical contact, the battery is able to self-discharge through this short circuit, which can lead to a thermal runaway event
Thermal runaway which in turn can lead to fire

Method used

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  • Composite separator with aligned particles
  • Composite separator with aligned particles
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Embodiment Construction

[0019] As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0020] To address issues known to affect conventional porous polymer separators, alternative separator materials and / or configurations may be beneficial. Separators formed from dense sheets of solid electrolyte (SE) can address both issues of flammability and dendrite formation. However, dense SE sheets generally cannot be used in current fabrication techniques that require flexible se...

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Abstract

An ionically conductive composite separator for a rechargeable battery and methods for producing the same are provided. The separator may include a bulk material having an anode side and a cathode side and a thickness extending therebetween and a region of aligned particles extending across the bulk material thickness. The aligned particles may be formed as a particle chain and the particles may be formed of a solid electrolyte material. The ionically conductive separator may be formed by providing a plurality of particles within a bulk material and applying an AC electric field to the particles and the bulk material while the bulk material is in a liquid state to align the particles into at least one ionically conductive aligned particle region within the bulk material.

Description

technical field [0001] The present disclosure relates to separators including aligned particles for improving ion conductivity. Background technique [0002] Rechargeable batteries (eg, lithium-ion batteries) typically include separators that provide mechanical and electrical isolation of the electrodes while allowing ionic conduction. A common separator is a porous polymer membrane immersed in a liquid electrode. However, common liquid electrodes used in many batteries (eg, lithium-ion batteries) can be flammable and in severe accidents can contribute to a fire. If overcharging of the lithium ion battery occurs, lithium dendrites may grow at the negative electrode, and the lithium dendrites pass through the porous separator, causing an internal short circuit. If the two electrodes come into electrical contact, the battery is able to self-discharge through this short circuit, which can lead to a thermal runaway event. Thermal runaway may in turn lead to a fire. Contents...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M2/14H01M50/403H01M50/443H01M50/463H01M50/497
CPCH01M50/403H01M50/463H01M50/443H01M50/497H01M10/052H01M10/056H01M2300/0082H01M2300/0068H01M2300/0088Y02E60/10H01M50/446Y02P70/50H01M10/14H01M2010/4271
Inventor 文卡塔拉曼尼·阿南丹安德鲁·罗伯特·德鲁约翰·马修·俊德
Owner FORD GLOBAL TECH LLC
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