Microsupercapacitors as miniaturized energy-storage components for on-chip electronics

Kyeremateng, Nana Amponsah; Brousse, Thierry; Pech, David

doi:10.1038/nnano.2016.196

Cited by 854 publications

(616 citation statements)

References 105 publications

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“…Micro-supercapacitors are designed with thin-film electrodes assembled in various configurations, 6 typically at the scale of mm 2 or cm 2 footprint area, with the goal of complementing or replacing microbatteries in applications that include power sensors and microelectronic devices. In many such applications, area-normalized capacitance (F cm −2 ), energy, and power (based on the footprint of the device) are the most important performance metrics.…”

Section: Future Needs and Prospectsmentioning

confidence: 99%

Perspective—A Guideline for Reporting Performance Metrics with Electrochemical Capacitors: From Electrode Materials to Full Devices

Balducci¹,

Bélanger²,

Brousse³

et al. 2017

J. Electrochem. Soc.

213

124

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Over the past decade, interest in electrochemical capacitors as an energy-storage technology has increased enormously, spurring the development and evaluation of a large number of new materials and device configurations. This perspective article aims to propose guidelines by which new materials and devices should be evaluated, and how resulting data should be reported with respect to critical metrics such as capacitance, energy and power. In recent years the number of publications dedicated to electrochemical capacitors (ECs) has increased enormously, while drawing from a diverse community of researchers in the fields of electrochemistry, material science, and engineering.1,2 Contributions from such different perspectives have been invaluable to the advancement of EC science and technology, but has also resulted in some confusion in the corresponding scientific literature because of the wide range of materials (active and inactive), device configurations, and electrochemical testing protocols that are used. Current StatusUnfortunately, a comparison of the electrochemical properties of materials for EC is often challenging because key experimental parameters and procedures are not fully described in literature reports, and in some cases data from single electrode experiments are improperly extrapolated to projected device performance. Inconsistency in reporting key performance metrics hinders the comparison of data from different laboratories on otherwise related materials and devices. 1,2The present perspective article identifies some useful guidelines for correctly evaluating the electrochemical performance of EC materials and devices and reporting on the resulting findings. Future Needs and ProspectsMaterials for ECs (electrode and electrolyte).-When a new (active) material is proposed, its synthesis procedure should be described in detail sufficient to allow for replication in another laboratory; basic material properties should be also reported (particle/crystallite/film morphology, crystal structure, etc). Any electrode preparation using the resulting materials must be clearly described, including information on the respective ratios (or weight %) between active material, conductive agent (if present) and binder(s) used in electrode fabrication. Furthermore, one should report the active material mass loading per electrode area, for example in units of mg cm −2 . This information is essential for readers to clearly evaluate the electrochemical performance of both the active material and full device, particularly when comparing against results from other laboratories or from commercial products. Authors should consider that the mass loading of commercialized activated carbon electrodes is ∼10 mg cm −2 . * Electrochemical Society Member. z E-mail: andrea.balducci@uni-jena.de When a new electrolyte component (solvent or salt) is proposed, the composition of the investigated electrolyte should be clearly described, for example with concentration of the salts noted in units of mol L −1 . The viscosity and ionic c...

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Section: Future Needs and Prospectsmentioning

confidence: 99%

Perspective—A Guideline for Reporting Performance Metrics with Electrochemical Capacitors: From Electrode Materials to Full Devices

Balducci¹,

Bélanger²,

Brousse³

et al. 2017

J. Electrochem. Soc.

213

124

View full text Add to dashboard Cite

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“…This adaptive storage building block can be integrated on silicon and combined to miniaturized microsupercapacitors [6] to provide a compact module. With this module coupled to an energy-harvesting source, it could be envisioned for a wireless sensor node to become fully battery-free.…”

Section: Discussionmentioning

confidence: 99%

Energy-harvesting powered variable storage topology for battery-free wireless sensors

Mahboubi¹,

Bafleur

Boitier

et al. 2018

2018 7th International Conference on Modern Circuits and Systems Technologies (MOCAST)

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Abstract-This paper presents a novel energy storage architecture aimed at providing the energy autonomy of batteryfree wireless sensors powered by energy harvesting. It is based on a concept of adaptive storage using ultra-capacitors and allows meeting contradictory compromises: fast initial startup (small capacitance value) to be able to supply the load as quickly as possible, storage of a large amount of energy (big capacitance value) to increase the energy autonomy of the load and providing a pre-regulated voltage. Compared to previously published structures, the proposed architecture is much less complex and exhibits 92% energy utilization efficiency.

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“…[16] Even at a fast scan rate of 100 mV s −1 , the CV remains nearly rectangular in shape, indicating the high-power capability of printed planar supercapacitors. [3,9] According to the Equation (2) [14,15] Adv. Recently, it has been shown that the areal capacitance gives a more accurate picture of the true performance of a planar supercapacitor compared with gravimetric values.…”

Section: Wwwadvelectronicmatdementioning

confidence: 99%

Water‐Soluble Hybrid Graphene Ink for Gravure‐Printed Planar Supercapacitors

Chang

Sai

et al. 2018

Adv Elect Materials

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efforts have been devoted to the design of graphene microstructures, most of graphene materials are difficult to be applied in all-solid-state planar supercapacitors because of their agglomerations due to the strong π-π interaction between the large basal planes and poor electrical conductivity in the fabricated microelectrodes. [13] This undesirable phenomenon significantly prevents the access of PVA-based gel electrolyte ions into the interplanar space, resulting in limited ion accessible surface area of graphene and sluggish ion transport kinetics so that there are lots of "dead surfaces" of graphene without contribution to the energy storage. [1] For reducing the graphene agglomerations, studies during the past few years were explored. Wu et al. used lithography to pattern reduced graphene oxide (RGO) microelectrodes for planar supercapacitors with areal capacitance around 0.32 mF cm −2 . [14] Meanwhile, Gao et al. directly used another laser writing to reduce graphene oxide (GO) paper and readily obtained a number of configurations for the RGO-based planar supercapacitors with an areal capacitance of 0.59 mF cm −2 . [15] El-Kady and Kaner further demonstrated a fabrication of graphene-based planar supercapacitors with an areal capacitance over 2.0 mF cm −2 by direct laser writing on graphite oxide films using a standard Light-Scribe DVD burner. [16] Although promising areal capacitances of graphene-based planar supercapacitors with fewer graphene agglomerations have been achieved by these microfabrication technologies, the global depositions of graphene material are usually required and patterned into interdigitated structures via etching or laser scribing, resulting in the complicated processing and wasting more graphene material.Selecting suitable microfabrication methods using proper graphene material is particularly crucial for enhancing the electrochemical performance of planar supercapacitors. As a powerful and cost efficient direct patterning method, printing technology attracts significant interest in graphene-based planar supercapacitors due to its simple processing and few material waste. [17][18][19] For example, Li et al., [13] Wang et al., [18] and Liu et al. [6] developed the full-inkjet-printing and screen printing for graphene-based planar supercapacitors. Although these two printing techniques provide the advantage of directly patterning the microelectrodes, to some extent, they usually face the risk of the nozzle clogging and nonuniform pattern when needing high resolution feature. Fortunately, gravure printing as one Flexible printed all-solid-state graphene-based planar supercapacitors have attracted great attentions for their potential applications in portable and wearable electronics. However, the limited ion accessible surface area and slow ion diffusion rate lead to low specific capacitance and poor rate performance. Increasing the diffussion of polyvinyl alcohol (PVA)-based gel electrolyte into the printed graphene microelectrodes is a great challenge for improving its energy storage...

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Microsupercapacitors as miniaturized energy-storage components for on-chip electronics

Cited by 854 publications

References 105 publications

Perspective—A Guideline for Reporting Performance Metrics with Electrochemical Capacitors: From Electrode Materials to Full Devices

Perspective—A Guideline for Reporting Performance Metrics with Electrochemical Capacitors: From Electrode Materials to Full Devices

Energy-harvesting powered variable storage topology for battery-free wireless sensors

Water‐Soluble Hybrid Graphene Ink for Gravure‐Printed Planar Supercapacitors

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