Flexible quasi-solid-state planar micro-supercapacitor based on cellular graphene films

Shao, Yuanlong; Li, Jianmin; Li, Yaogang; Wang, Hongzhi; Zhang, Qinghong; Kaner, Richard B.

doi:10.1039/c7mh00441a

Cited by 230 publications

(122 citation statements)

References 45 publications

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“…Because of the weak interlayer interaction and large interlayer distance of 0.65 nm between each S-Mo-S layer, lithium ions can easily intercalate/extract through MoS 2 layers. Thus, MoS 2 is a promising anode material and its capacity can be three and a half times that of commercial graphite anodes [9][10][11][12][13]. Reversible capacity as high as 1,290 mAh/g has been reported for the MoS 2 -graphene composite electrode [14].…”

Section: Introductionmentioning

confidence: 98%

MoS2/C/C nanofiber with double-layer carbon coating for high cycling stability and rate capability in lithium-ion batteries

Hou

Shen

et al. 2018

Nano Res.

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MoS 2 has attracted a lot of interest in the field of lithium-ion storage as an anode material owing to its high capacity and two-dimensional (2D)-layer structure. However, its electrochemical properties, such as rate capability and cycling stability, are usually limited by its low conductivity, volume variation, and polysulfide dissolution during lithiation/delithiation cycling. Here, a designed two-layer carbon-coated MoS 2 /carbon nanofiber (MoS 2 /C/C fiber) hybrid electrode with a double-layer carbon coating was achieved by a facile hydrothermal and subsequent electrospinning method. The double carbon layer (inner amorphous carbon and outer carbon fiber) shells could efficiently increase the electron conductivity, prevent the aggregation of MoS 2 flakes, and limit the volume change and polysulfide loss during long-term cycling. The as-prepared MoS 2 /C/C fiber electrode exhibited a high capacity of up to 1,275 mAh/g at a current density of 0.2 A/g, 85.0% first cycle Coulombic efficiency, and significantly increased rate capability and cycling stability. These results demonstrate the potential applications of MoS 2 /C/C fiber hybrid material for energy storage and may open up a new avenue for improving electrode energy storage performance by fabricating hybrid nanofiber electrode materials with double-layer carbon coatings.

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Section: Introductionmentioning

confidence: 98%

MoS2/C/C nanofiber with double-layer carbon coating for high cycling stability and rate capability in lithium-ion batteries

Hou

Shen

et al. 2018

Nano Res.

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“…The supercapacitor retained its rectangular shape under a wide range of scan rates of from 50 to 1000 mV s −1 (Figure 5a), demonstrating its near ideal featured electrochemical double-layer capacitive (EDLC) behavior and fast charge storage ability under large current density, which is further confirmed by the galvanostatic charge/discharge (GCD) results in Figure 5b. This value outperformed other reported graphene-based micro supercapacitor such as vertically aligned graphene (VG, 7.3 mF cm −2 ), [45] laser rGO (0.5-2.5 mF cm −2 ), [46] rGO (2.47 mF cm −2 ) [47] and the 3D cellular graphene (≈6 mF cm −2 ). Importantly, the device presented a high areal capacity of 7.9 mF cm −2 at a current density of 0.5 mA cm −2 and kept 6.9 mF cm −2 when the current density increased tenfold ( Figure S10, Supporting Information).…”

Section: Energy Storage Devicementioning

confidence: 63%

Biomimetic and Radially Symmetric Graphene Aerogel for Flexible Electronics

Gao

Fan

Zhou

et al. 2019

Adv Elect Materials

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Developing a generalized route to effectively fabricate periodic mechanically flexible graphene aerogels across several size orders and whole structural integrity on a large scale for flexible electronics is still a challenge. Herein, inspired by bamboo's natural hierarchical structure, a general method is developed to effectively fabricate biomimetic cellular graphene fibers using hydrogen bubbles and ice simultaneously as templates, whose whole size ranges from micro to several centimeters. Owing to its superior mechanical flexibility demonstrated by the in situ scanning electron microscope test and intrinsically good electrical conductivity, its potential in flexible electronics such as sensors, supercapacitors, and Ni–Zn batteries is carefully investigated. It not only shows superior sensitivity in the monitoring of the pulse pressure in sensor devices but also directly serves as a promising binder, flexible scaffold, and conductive additive, as well as extra active material in the energy storage device without any extra additives. This strategy can also be extended to fabricate other configurations of graphene aerogels such as spring‐like type and bulk film, able to serve as the next generation of intelligent infrastructure for achieving multifunctional structural and functional tasks.

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“…Furthermore, the challenge toward designing of 3D MSCs with leakage‐free electrolytes is still remained. This will call for solid or gel polymer electrolytes with high ionic conductivities to maintain an appropriate power density . Currently, one of widely used electrolytes in 3D MSCs is the ionic liquid‐polymer gel electrolytes with low flammability or vapor tension …”

Section: Summary and Perspectivesmentioning

confidence: 99%

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

Liu

Zhao

Lei

2019

InfoMat

133

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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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Flexible quasi-solid-state planar micro-supercapacitor based on cellular graphene films

Cited by 230 publications

References 45 publications

MoS2/C/C nanofiber with double-layer carbon coating for high cycling stability and rate capability in lithium-ion batteries

MoS2/C/C nanofiber with double-layer carbon coating for high cycling stability and rate capability in lithium-ion batteries

Biomimetic and Radially Symmetric Graphene Aerogel for Flexible Electronics

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

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