Journal
NANO ENERGY
Volume 94, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2022.106942
Keywords
Graphene oxide; PVA; Acidification; Moisture adsorption; Electricity generation; Functional group
Categories
Funding
- Australian Research Council [DP210100879, LP190100829]
- Spanish Ministry of Science, Innovation and Universities under the Ramon y Cajal fellowship [RYC2018-024947-I]
- Australian Research Council [LP190100829] Funding Source: Australian Research Council
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This article reports a simple strategy to modify graphene oxide and improve the electric output of moisture-electric generators. By assembling multiple generator units in series or parallel, the electric output can be further improved. This technology has great commercial potential for flexible and wearable applications.
Harvesting energy from ubiquitous moisture is attracting growing interest for directly powering electronic devices. However, it is still challenging to fabricate high-performing moisture-electric generators (MEGs) with high and stable electric output. Herein, we report a simple strategy to modify the oxygen-based groups of graphene oxide using hydrochloric acid treatment, which boosts the electric output based on the device structure of graphene oxide/polyvinyl alcohol (GO/PVA) MEGs. The resulting MEG enables a stable voltage of 0.85 V and a current of 9.28 mu A (92.8 mu A.cm(-2)), which are among the highest values reported so far. More excitingly, electric output gets further improved by simply assembling four MEG units in series or parallel. Moreover, the MEG shows great commercial potential for flexible and wearable applications. Driven by these advancements, the assembled MEGs can successfully power sensors and calculators. This work opens a new era of advance for a new energy conversion technology able to directly powering electronic devices.
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