Nano-sandwiched metal hexacyanoferrate/graphene hybrid thin films for in-plane asymmetric micro-supercapacitors with ultrahigh energy density

He, Yong; Zhang, Panpan; Wang, Mao; Wang, Faxing; Tan, Deming; Li, Yang; Zhuang, Xiaodong; Zhang, Fan; Feng, Xinliang

doi:10.1039/c9mh00063a

Cited by 59 publications

(46 citation statements)

References 65 publications

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“…[7] Among them, micro-supercapacitors (MSCs) with attractive merits including high power density,long cycling stability,and outstanding rate capability have been demonstrated as one of the promising microsized power sources. [8] At present, various active materials, [9] such as carbon-based materials, [10] metal compounds [11] and polymers, [12] have been developed for MSCs.T os ubstantially improve the performance of MSCs, some new materials with rich active sites and efficient electron conduction are supposed to be explored. [13] Owing to the designable regular porous structure and tunable functionality,C OFs are desirable candidates.…”

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confidence: 99%

An Olefin‐Linked Covalent Organic Framework as a Flexible Thin‐Film Electrode for a High‐Performance Micro‐Supercapacitor

et al. 2019

Angewandte Chemie

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101

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Developing effective synthetic strategies as well as enriching functionalities for sp 2 -carbon-linked covalent organic frameworks (COFs) still remains ac hallenge.N ow, taking advantage of av ariant of Knoevenagel condensation, an ew fully conjugated COF (g-C 34 N 6 -COF)l inked by unsubstituted C = Cb onds was synthesized.I ntegrating 3,5dicyano-2,4,6-trimethylpyridine and 1,3,5-triazine units into the molecular framework leads to the enhanced p-electron communication and electrochemical activity.This COF shows uniform nanofibrous morphology.B ya ssembling it with carbon nanotubes,af lexible thin-film electrode for am icrosupercapacitor (MSC) can be easily obtained. The resultant COF-based MSC shows an areal capacitance of up to 15.2 mF cm À2 ,ahigh energy density of up to 7.3 mWh cm À3 , and remarkable rate capability.T hese values are among the highest for state-of-the-art MSCs.M oreover,t his device exhibits excellent flexibility and integration capability. Figure 4. a) The preparation process of COF-MSC through filtration with alab-made interdigital mask, and the optical photograph of COF-MSC.Capacitive performances of COF-MSC:b)CVcurves at scan rates from 2t o20mVs À1 ;c )The specific areal and volumetriccapacitances (C A and C V )a tdifferent scan rates;d)GCD curves at current densities from 0.05 to 0.4 mA cm À2 ;e )Ragone plot compared with some previous reported electrochemical energy storage devices including Li thin film battery, [10a] electrolytic capacitors, [10c] and MSCs based

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confidence: 99%

An Olefin‐Linked Covalent Organic Framework as a Flexible Thin‐Film Electrode for a High‐Performance Micro‐Supercapacitor

et al. 2019

Angewandte Chemie

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101

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“…However, the printed thick microelectrodes suffer from low electronic conductivity, poor rate capability, and inferior cycling stability. Zhang and co‐workers prepared a series of sandwich‐structured transition metal hexacyanoferrates (MHCF, M = Cu, Ni, Co, and Fe)/graphene thin films for asymmetric MSCs by alternate stacking deposition of graphene and MHCF layers. Thanks to the structural advances of hybrid films and asymmetric in‐plane configuration, the resultant MSCs based on FeHCF as anode and CuHCF as cathode offered high energy density of 44.6 mWh cm −3 .…”

Section: Micro‐supercapacitorsmentioning

confidence: 99%

The Road Towards Planar Microbatteries and Micro‐Supercapacitors: From 2D to 3D Device Geometries

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The rapid development and further modularization of miniaturized and self‐powered electronic systems have substantially stimulated the urgent demand for microscale electrochemical energy storage devices, e.g., microbatteries (MBs) and micro‐supercapacitors (MSCs). Recently, planar MBs and MSCs, composed of isolated thin‐film microelectrodes with extremely short ionic diffusion path and free of separator on a single substrate, have become particularly attractive because they can be directly integrated with microelectronic devices on the same side of one single substrate to act as a standalone microsized power source or complement miniaturized energy‐harvesting units. The development of and recent advances in planar MBs and MSCs from the fundamentals and design principle to the fabrication methods of 2D and 3D planar microdevices in both in‐plane and stacked geometries are highlighted. Additonally, a comprehensive analysis of the primary aspects that eventually affect the performance metrics of microscale energy storage devices, such as electrode materials, electrolyte, device architecture, and microfabrication techniques are presented. The technical challenges and prospective solutions for high‐energy‐density planar MBs and MSCs with multifunctionalities are proposed.

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“…Alternative to gravimetric normalization of performance, the large areal/volumetric capacities are long‐term scientific pursuits for MSCs, although high volumetric energy and power densities are readily achieved for the in‐plane MSCs with thin films at present, they still suffer from severely low areal energy density compared with the sandwich counterparts . Additionally, in contrast to MBs, there is a considerable gap in energy storage capability for MSCs whatever their configurations are to fail to meet the growing demand for energy consumption of electronic components.…”

Section: Three‐dimensional Electrode Design For Mscsmentioning

confidence: 99%

Advances on three‐dimensional electrodes for micro‐supercapacitors: A mini‐review

Liu

Zhao

Lei

2019

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141

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Owing to the high power density, long cycle life and maintain‐free, micro‐supercapacitors (MSCs) stand out as preferred miniaturized energy source for the miscellaneous autonomous electronic components. However, the shortage of energy density is the main stumbling block for their practical applications. To solve this energy issue, constructing a three‐dimensional (3D) electrode within the limited footprint area is proposed as a new solution for improving the energy storage capacity of MSCs. In the last few years, extensive efforts have been devoted to developing 3D electrodes for MSCs, and significant progress and breakthrough have been achieved. While, there is still lack of systematic summary on the 3D electrode design strategies. To this end, it is imperative to outline the basic design conception, summarize the current states, and discuss the future research about 3D electrodes in MSCs based on the latest development.

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Nano-sandwiched metal hexacyanoferrate/graphene hybrid thin films for in-plane asymmetric micro-supercapacitors with ultrahigh energy density

Abstract: In-plane asymmetric micro-supercapacitors with ultrahigh energy density are rationally constructed using nano-sandwiched metal hexacyanoferrate/graphene hybrid thin films.

Cited by 59 publications

References 65 publications

An Olefin‐Linked Covalent Organic Framework as a Flexible Thin‐Film Electrode for a High‐Performance Micro‐Supercapacitor

An Olefin‐Linked Covalent Organic Framework as a Flexible Thin‐Film Electrode for a High‐Performance Micro‐Supercapacitor

The Road Towards Planar Microbatteries and Micro‐Supercapacitors: From 2D to 3D Device Geometries

Advances on three‐dimensional electrodes for micro‐supercapacitors: A mini‐review

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