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Article: Electrochemical actuation of nickel hydroxide/oxyhydroxide at sub-volt voltages

TitleElectrochemical actuation of nickel hydroxide/oxyhydroxide at sub-volt voltages
Authors
Issue Date2017
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/snb
Citation
Sensors and Actuators B: Chemical, 2017, v. 248, p. 657-664 How to Cite?
AbstractThe development of materials capable of actuating at low triggering voltages is crucial for applications such as compact prime movers for soft, micro robots. In this paper, the electrochemical actuation of Ni(OH)2/NiOOH in alkaline environment at low voltages is demonstrated and studied for the first time. Specifically, sub-micron layers of Ni(OH)2/NiOOH deposited on Ni films a few microns thick by anodic electrodeposition were found to undergo reversible contraction by ∼0.1% in an alkaline solution under a low voltage of only ∼0.4 V, causing a 5-mm long bi-layer actuator to bend by ∼3.5 mm at its end, giving a large device strain of ∼70%. The actuation mechanism is found to be due to a redox reaction in the Ni(OH)2/NiOOH couple. By masked electrodeposition, successful fabrication of actuators of various shapes and actuation performance was also demonstrated. The required electrolyte can be packaged with the actuating material to achieve a stand-alone actuating device.
Persistent Identifierhttp://hdl.handle.net/10722/243150
ISSN
2018 Impact Factor: 6.393
2015 SCImago Journal Rankings: 1.305
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorKwan, KW-
dc.contributor.authorHau, NY-
dc.contributor.authorFeng, SPT-
dc.contributor.authorNgan, AHW-
dc.date.accessioned2017-08-25T02:50:43Z-
dc.date.available2017-08-25T02:50:43Z-
dc.date.issued2017-
dc.identifier.citationSensors and Actuators B: Chemical, 2017, v. 248, p. 657-664-
dc.identifier.issn0925-4005-
dc.identifier.urihttp://hdl.handle.net/10722/243150-
dc.description.abstractThe development of materials capable of actuating at low triggering voltages is crucial for applications such as compact prime movers for soft, micro robots. In this paper, the electrochemical actuation of Ni(OH)2/NiOOH in alkaline environment at low voltages is demonstrated and studied for the first time. Specifically, sub-micron layers of Ni(OH)2/NiOOH deposited on Ni films a few microns thick by anodic electrodeposition were found to undergo reversible contraction by ∼0.1% in an alkaline solution under a low voltage of only ∼0.4 V, causing a 5-mm long bi-layer actuator to bend by ∼3.5 mm at its end, giving a large device strain of ∼70%. The actuation mechanism is found to be due to a redox reaction in the Ni(OH)2/NiOOH couple. By masked electrodeposition, successful fabrication of actuators of various shapes and actuation performance was also demonstrated. The required electrolyte can be packaged with the actuating material to achieve a stand-alone actuating device.-
dc.languageeng-
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/snb-
dc.relation.ispartofSensors and Actuators B: Chemical-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleElectrochemical actuation of nickel hydroxide/oxyhydroxide at sub-volt voltages-
dc.typeArticle-
dc.identifier.emailKwan, KW: kwan15@hku.hk-
dc.identifier.emailFeng, SPT: hpfeng@hku.hk-
dc.identifier.emailNgan, AHW: hwngan@hku.hk-
dc.identifier.authorityFeng, SPT=rp01533-
dc.identifier.authorityNgan, AHW=rp00225-
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.snb.2017.04.009-
dc.identifier.hkuros275311-
dc.identifier.volume248-
dc.identifier.spage657-
dc.identifier.epage664-
dc.identifier.isiWOS:000403772200080-
dc.publisher.placeSwitzerland-

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