NDLI: Integrated micro fuel cell with on-demand hydrogen production and passive control MEMS

Content Provider	Springer Nature Link
Author	Swaminathan, Vikhram V. Zhu, Likun Gurau, Bogdan Masel, Richard I. Shann, Mark A.
Copyright Year	2011
Abstract	An ever increasing demand for packaging more energy on-board to meet the needs of power hungry microsystems is driving the miniaturization of power generators. We report a fully integrated Power MEMS, in the 10-μL size, designed to deliver high energy and power densities. On-board hydrogen production and an efficient control scheme that facilitates integration with a fuel cell membrane electrode assembly are key elements for micro energy conversion. A millimeter-scale reactor produces hydrogen by hydrolysis of CaH2 and LiAlH4, to yield energy densities of the order of 200 Whr/L. A passive microfluidic control scheme, incorporating surface tension to pump water in a microchannel for hydrolysis and microvalve control using hydrogen backpressure, facilitates delivery and regulation and eliminates bulky auxiliaries that consume parasitic power. We tested the ability of this control scheme to improve uniformity of power delivery during long periods of lower demand, with fast switching to mass transport regime on the order of seconds, and realized peak power density of up to 391.85 W/L. Prototypes have been tested for duty periods from 2–48 h, with multiple switching of power demand in order to establish performance across multiple regimes. Critical to the realization of the integrated power MEMS, and its energy and power density, are effects of water transport and byproduct hydrate swelling on hydrogen production in the microreactor. While CaH2 showed superior hydrogen release kinetics that enhances power density, LiAlH4 provided greater energy density due to reduced byproduct expansion that permitted increased hydrogen production.
Starting Page	735
Ending Page	749
Page Count	15
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	12
Issue Number	5
e-ISSN	16134990
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-12-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Micro fuel cell Microvalve Micro hydrogen generator Hydride MEMS Industrial Chemistry/Chemical Engineering Biomedical Engineering Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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