Challenges and prospects of 3D micro-supercapacitors for powering the internet of things

Lethien, Christophe; Bideau, Jean Le; Brousse, Thierry

doi:10.1039/c8ee02029a

Cited by 330 publications

(255 citation statements)

References 164 publications

(205 reference statements)

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“…In these applications, sensor networks communicate with groups of interconnected devices in order to automate the control and decision‐making processes. The extent of autonomous operability, smartness and portability is dependent on the number of the WSNs . To power the WSNs, batteries have been used traditionally.…”

Section: Introductionmentioning

confidence: 99%

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Sriramdas

Kang

Miao

et al. 2020

Advanced Energy Materials

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Energy harvesting from extremely low frequency magnetic fields using magneto‐mechano‐electric (MME) harvesters enables wireless power transfer for operating Internet of Things (IoT) devices. The MME harvesters are designed to resonate at a fixed frequency by absorbing AC magnetic fields through a composite cantilever comprising of piezoelectric and magnetostrictive materials, and a permanent magnetic tip mass. However, this harvester architecture limits power generation because volume of the magnetic end mass is closely coupled with the resonance frequency of the device structure. Here, a method is demonstrated for maintaining the resonance frequency of the MME harvesters under all operating conditions (e.g., 60 Hz, standard frequency of electricity in many countries) while simultaneously enhancing the output power generation. By distributing the magnetic mass over the beam, the output power of the harvester is significantly enhanced at a constant resonance frequency. The MME harvester with distributed forcing shows 280% improvement in the power generation compared with a traditional architecture. The generated power is shown to be sufficient to power eight different onboard sensors with wireless data transmission integrated on a drone. These results demonstrate the promise of MME energy harvesters for powering wireless communication and IoT sensors.

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Section: Introductionmentioning

confidence: 99%

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Sriramdas

Kang

Miao

et al. 2020

Advanced Energy Materials

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“…Such electrodes rely on the deposition of pseudocapacitive materials, known for their prodigious specific capacitance, onto a high‐surface‐area conductive support . The areal capacitance is improved from one to three orders of magnitude compared to the planar geometry . However, the success of this approach will depend on the successful integration of these 3D electrodes on small‐sized substrates and their subsequent encapsulation for operational on‐chip microdevices, via commonly accepted semiconductor processing methods.…”

Section: Introductionmentioning

confidence: 99%

3D Interdigitated Microsupercapacitors with Record Areal Cell Capacitance

Ferris

Bourrier

Garbarino

et al. 2019

Small

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Due to their high‐power density and long lifetime, microsupercapacitors have been considered as an efficient energy supply/storage solution for the operation of small electronic devices. However, their fabrication remains confined to 2D thin‐film microdevices with limited areal energy. In this study, the integration of all‐solid‐state 3D interdigitated microsupercapacitors on 4 in. silicon wafers with record energy density is demonstrated. The device electrodes are composed of a pseudocapacitive hydrated ruthenium dioxide RuO2 deposited onto highly porous current collectors. The encapsulated devices exhibit cell capacitance of 812 mF cm−2 per footprint area at an energy density of 329 mJ cm−2, which is the highest value ever reported for planar configuration. These components achieve one of the highest surface energy/power density trade‐offs and address the issue of electrical energy storage of modern electronics.

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“…Smart wearable systems have attracted a growing interest in the past years to support the development of sensor networks and communicating objects called the internet of things (IoT). IoT is a generic term used to describe the exchange of data between portable, smart, and connected devices creating a new range of devices able to interact and communicate through the internet . Applications relying on wearable devices such as healthcare, smart clothes, or electronic papers have motivated many research works to achieve for instance individual management and continuous monitoring of patients .…”

Section: Introductionmentioning

confidence: 99%

Facile and Scalable Preparation of Ruthenium Oxide‐Based Flexible Micro‐Supercapacitors

Brousse

Pinaud

Nguyen

et al. 2019

Advanced Energy Materials

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Tremendous efforts have been invested in the development of the internet of things during the past 10 years. Implantable sensors still need embedded miniaturized energy harvesting devices, since commercialized thin films and microbatteries do not provide sufficient power densities and suffer from limited lifetime. Therefore, micro‐supercapacitors are good candidates to store energy and deliver power pulses while providing non‐constant voltage output with time. However, multistep expensive protocols involving mask aligners and sophisticated cleanrooms are used to prepare these devices. Here, a simple and versatile laser‐writing procedure to integrate flexible micro‐supercapacitors and microbatteries on current‐collector‐free polyimide foils is reported, starting from commercial powders. Ruthenium oxide (RuO2)‐based micro‐supercapacitors are prepared by laser irradiation of a bilayered tetrachloroauric acid (HAuCl4 · 3H2O)–cellulose acetate/RuO2 film deposited by spin‐coating, which leads to adherent Au/RuO2 electrodes with a unique pillar morphology. The as‐prepared microdevices deliver 27 mF cm−2/540 F cm−3 in 1 m H2SO4 and retain 80% of the initial capacitance after 10 000 cycles. This simple process is applied to make carbon‐based micro‐supercapacitors, as well as metal oxide based pseudocapacitors and battery electrodes, thus offering a straightforward solution to prepare low‐cost flexible microdevices at a large scale.

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Challenges and prospects of 3D micro-supercapacitors for powering the internet of things

Cited by 330 publications

References 164 publications

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

3D Interdigitated Microsupercapacitors with Record Areal Cell Capacitance

Facile and Scalable Preparation of Ruthenium Oxide‐Based Flexible Micro‐Supercapacitors

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