Moisture-based power generation element battery cell

A moisture-powered battery cell with a functional layer of graphene oxide and PVA binder, featuring controlled bond ratios and electrode gradients, addresses the humidity-dependent output issues of MEGs, achieving stable and enhanced electrical performance for flexible and high-power applications.

JP7864719B2Active Publication Date: 2026-05-25AUSTRALIAN ADVANCED MATERIALS PTY LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
AUSTRALIAN ADVANCED MATERIALS PTY LTD
Filing Date
2022-01-25
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Conventional moisture-powered energy generators (MEGs) face challenges with voltage and current outputs that are strongly dependent on relative humidity and exhibit instantaneous performance, limiting their application in powering high-power equipment, and there is a need for improved power generation and amplification mechanisms.

Method used

A moisture-powered battery cell with a functional layer comprising graphene oxide (GO) and a polymer binder, such as PVA, with a controlled C=O to CC bond ratio and interlayer spacing, and electrodes with varying moisture permeability and work functions to create a gradient, enhancing ion absorption and electrical output.

Benefits of technology

The solution results in stable and tunable electrical output, improved adhesion, and increased voltage and current stability, making the battery cell suitable for powering high-power equipment and flexible devices.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

A functional layer for a moisture harvesting battery cell, the functional layer comprising a graphene oxide having a ratio of C=O bonds to C-C bonds greater than 1:9. The functional layer comprises a treated graphene oxide having an interlayer spacing greater than the interlayer spacing of the graphene oxide from which the treated graphene oxide is prepared. The functional layer comprises graphene oxide and a polymeric binder selected to bond with a conductive substrate. The polymeric binder may be one or more of PVA, PVB, PMMA or PVP. The graphene oxide and polymeric binder are treated with an acid such as HCl, H2SO4 or HNO3. The conductive substrate forming the electrode may be mounted on a further substrate for use as a moisture generator (MEG) in an electronic device. The electronic device is configured to have a surface that is placed in contact with the skin of a subject during use.
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