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BATTERY MAKING USE OF MATERIALS THAT CHANGE VOLUME DURING USE

IP.com Disclosure Number: IPCOM000235862D
Publication Date: 2014-Mar-27

Publishing Venue

The IP.com Prior Art Database

Related People

Quallion LLC: OWNER

Abstract

The battery includes a cathode configured to employ water as a cathode active material. The battery also includes an anode having an anode active material. An electrolyte activates the anode and the cathode. The electrolyte includes a lithium ion conductive glass-ceramic supported on a porous support such that the support provides mechanical support to the electrolyte. The electrolyte is substantially impermeable to water and acts as a barrier between the water and the anode. The anode active material may be contained in a bellows section of the case of the battery, such that a decrease in volume of the anode active material during discharge of the battery causes the bellows section of the case to contract.

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BATTERY MAKING USE OF MATERIALS THAT CHANGE VOLUME DURING USE

ABSTRACT

The battery includes a cathode configured to employ water as a cathode active material.

The battery also includes an anode having an anode active material. An electrolyte activates the anode and the cathode. The electrolyte includes a lithium ion conductive glass-ceramic supported on a porous support such that the support provides mechanical support to the electrolyte. The electrolyte is substantially impermeable to water and acts as a barrier between the water and the anode. The anode active material may be contained in a bellows section of the case of the battery, such that a decrease in volume of the anode active material during discharge of the battery causes the bellows section of the case to contract.

BACKGROUND

    Metal-water batteries can provide large energy levels because the active material in the cathode (water) can be provided indefinitely from sources such as sea water. Current metal- water batteries often employ lithium metal as an active material in the anode. However, the anode shrinks during discharge of the battery. This change in volume can damage the battery and cause the lithium metal to become exposed to water. This exposure of the lithium to water can be volatile. As a result, there is a need for an improved metal-water battery.

SUMMARY

    The present discussion relates to power sources and more particularly to batteries and hybrid batteries. The battery includes a cathode configured to employ water as a cathode active material. The battery also includes an anode having an anode active material. An electrolyte activates the anode and the cathode. The electrolyte includes a lithium ion conductive glass-ceramic supported on a porous support such that the support provides mechanical support to the electrolyte. The electrolyte is substantially impermeable to water acts as a barrier between the water and the anode.

    Another embodiment of the battery includes an electrolyte activating an anode and a cathode. The cathode is configured to employ water as the cathode active material. The anode includes an anode active material. The anode active material has a volume that decreases during discharge of the battery. The anode active material is positioned in a case that includes a bellows

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section. The bellows section is configured to expand and contract. The anode active material is positioned in the case such the decrease in the volume of the anode active material during discharge of the battery causes the bellows section of the case to contract.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 illustrates the operation of the battery.

Figure 2 illustrates the operation of the battery.

Figure 3 is a cross section of an example of a battery constructed according to Figure 1. Figure 4 is a cross section of an example of a battery constructed according to Figure 2.

DESCRIPTION

    The battery includes an electrolyte activating an anode and a cathode....