Three dimensional high-performance micro-supercapacitors with switchable high power density and high energy density

Wang, Kuangbing; Nie, Bangbang; Su, Ni; Lv, Benkun; Song, Huiqian; Qi, Guochen; Zhang, Yudong; Qiu, Jingjiang; Wei, Ronghan

doi:10.1039/d3nr03122e

Cited by 4 publications

(3 citation statements)

References 52 publications

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“…The energy density of the 3DG-SP/Ti3C2Tx MSC reaches 11.02 mWh cm −3 (11.02 µWh cm −2 ). Remarkably, these values were higher than those for Li thin-film batteries (<10 mWh cm −3 ), commercial supercapacitors (5.5 V/100 mF), and reported MXenerelated MSCs as listed in table 1 [25,[46][47][48][49][50][51][52][53].…”

Section: Resultsmentioning

confidence: 77%

Photon-beam-inducing synthesis of a tunable porous graphene/Ti₃C₂T _x heterostructure for energy conversion-storage system

Xia,

Liu,

Ning

et al. 2024

Nanotechnology

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Flexible electronic device requires a novel micro supercapacitors (MSCs) energy conversion-storage system based on two-dimensional (2D) materials to solve the problems of stiffness and complexity. Herein, we report a novel catalytic introduction method of graphene with adjustable porosity by high-energy photon beam. The graphene/Ti3C2Tx heterostructure was constructed by electrostatic self-assembly, has a high cycle life (98% after 8,000 cycles), energy density (11.02 mWh cm-3), and demonstrate excellent flexible alternating current line-filtering performance. The phase angle of -79.8° at 120 Hz and a resistance-capacitance constant of 0.068 ms. Furthermore, the porous graphene/Ti3C2Tx structures produced by multiple catalytic inductions allowed ions to deeply penetrate the electrode, thereby increasing the stacking density. The special “pore-layer nesting” graphene structure with adjustable pores effectively increased the specific surface area, and its superior matching with electrolyte solutions greatly improved surface-active site utilization. This work offers an alternative strategy for fabricating a 2D heterostructure for an MSC.

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Section: Resultsmentioning

confidence: 77%

Photon-beam-inducing synthesis of a tunable porous graphene/Ti₃C₂T _x heterostructure for energy conversion-storage system

Xia,

Liu,

Ning

et al. 2024

Nanotechnology

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“…In terms of the areal discharge capacity, the above values correspond to ∼4.5 and ∼2.9 μΑh cm –2 , whereas the areal energy (power) density is ∼1.9 μWh cm –2 (20.55 μW cm –2 ) and ∼1.1 μWh cm –2 (37.23 μW cm –2 ). These capacitance values are among the highest reported ones for interdigitated graphene supercapacitors, which are fabricated by laser-assisted methods. ,− A comparison is presented in Table . The equivalent series resistance (ESR) was estimated to be ∼267 Οhm from the intersection of the impedance curve with the horizontal axis in the Nyquist plot, shown in Figure d.…”

Section: Resultsmentioning

confidence: 87%

“…These capacitance values are among the highest reported ones for interdigitated graphene supercapacitors, which are fabricated by laser-assisted methods. 16 , 49 − 56 A comparison is presented in Table 2 . The equivalent series resistance (ESR) was estimated to be ∼267 Οhm from the intersection of the impedance curve with the horizontal axis in the Nyquist plot, shown in Figure 7 d. This ESR value is reasonable considering the gel electrolyte and the absence of a current collector and is comparable to ESR values that are commonly reported for similar supercapacitor configurations.…”

Section: Results and Discussionmentioning

confidence: 99%

Direct Graphene Deposition via a Modified Laser-Assisted Method for Interdigitated Microflexible Supercapacitors

Samartzis,

Athanasiou,

Sygellou

et al. 2024

ACS Appl. Nano Mater.

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The transcendence toward smarter technologies and the rapid expansion of the Internet of Things requires miniaturized energy storage systems, which may also be shape-conformable, such as microflexible supercapacitors. Their fabrication must be compatible with emerging manufacturing platforms with regard to scalability and sustainability. Here, we modify a laser-based method we recently developed for simultaneously synthesizing and transferring graphene onto a selected substrate. The modification of the method lies in the tuning of two key parameters, namely, the inclination of the laser beam and the distance between the precursor material and the acceptor substrate. A proper combination of these parameters enables the displacement of the trace of the transmitted laser beam from the deposited graphene film area. This mitigates the negative effects that arise from the laser-induced ablation of graphene on heat-sensitive substrates and significantly improves the electrical conductivity of the graphene films. The optimized graphene exhibits very high C/O (36) and sp2/sp3 (13) ratios. Post-transport irradiation was used to transform the continuous graphene films to interdigitated electrodes. The capacitance of the microflexible supercapacitor was measured to be among the highest reported ones in relation to interdigitated supercapacitors with electrodes based on laser-grown graphene. The device shows good cycling stability, retaining 91% of its capacitance after 10,000 cycles, showing no substantial degradation after applying bending conditions. This promising laser-based approach emerges as a viable alternative for the fabrication of microflexible interdigitated supercapacitors for paper electronics and smart textiles.

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Binder-free laser induced graphene-MnO2 composite electrodes for high areal energy density flexible supercapacitors

Rao,

Bhat,

2024

Electrochimica Acta

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Three dimensional high-performance micro-supercapacitors with switchable high power density and high energy density

Abstract: In the field of microscale energy storage, the fabrication of micro supercapacitors (MSCs) with high power density and high energy density has always been a focus of research. In this...

Cited by 4 publications

References 52 publications

Photon-beam-inducing synthesis of a tunable porous graphene/Ti₃C₂T _x heterostructure for energy conversion-storage system

Photon-beam-inducing synthesis of a tunable porous graphene/Ti₃C₂T _x heterostructure for energy conversion-storage system

Direct Graphene Deposition via a Modified Laser-Assisted Method for Interdigitated Microflexible Supercapacitors

Binder-free laser induced graphene-MnO2 composite electrodes for high areal energy density flexible supercapacitors

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Three dimensional high-performance micro-supercapacitors with switchable high power density and high energy density

Abstract: In the field of microscale energy storage, the fabrication of micro supercapacitors (MSCs) with high power density and high energy density has always been a focus of research. In this...

Cited by 4 publications

References 52 publications

Photon-beam-inducing synthesis of a tunable porous graphene/Ti3C2T x heterostructure for energy conversion-storage system

Photon-beam-inducing synthesis of a tunable porous graphene/Ti3C2T x heterostructure for energy conversion-storage system

Direct Graphene Deposition via a Modified Laser-Assisted Method for Interdigitated Microflexible Supercapacitors

Binder-free laser induced graphene-MnO2 composite electrodes for high areal energy density flexible supercapacitors

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Photon-beam-inducing synthesis of a tunable porous graphene/Ti₃C₂T _x heterostructure for energy conversion-storage system

Photon-beam-inducing synthesis of a tunable porous graphene/Ti₃C₂T _x heterostructure for energy conversion-storage system