Ultralong cycle life and outstanding capacitive performance of a 10.8 V metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device

Kamboj, Navpreet; Purkait, Taniya; Das, Manisha; Sarkar, Subhajit; Hazra, Kiran Shankar; Dey, Rajeeb

doi:10.1039/c9ee01458f

Cited by 113 publications

(70 citation statements)

References 50 publications

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“…Among the various electrodes, flexible and porous electrodes not only provide an interconnected network as electron and ion pathways for efficient charge and mass exchange during faradic redox reactions, but also allow more electroactive sites to be exposed to the electrolyte . Although many three‐dimensional (3D) electrode architectures have been developed, such as carbon nanotube sponges, graphene aerogels, metal foams, and polymer hydrogels, there are still many issues to be addressed: 1) carbon nanotube sponges and graphene aerogels are difficult to be produced in large scale because of their relatively high cost and/or complex preparation processes; 2) carbon foams are usually less conductive as compared to metals; 3) rigid electrodes with metals as current collectors cause their devices less flexible; and 4) most 3D electrodes possess structures with single macropores, which could form ion‐buffering reservoirs and accelerate ion transport, but contribute little to the large surface area for depositing electroactive substances, thus resulting in relatively low capacitances . Therefore, it is imperative to develop novel 3D electrodes with hierarchical pores, high conductivity, good flexibility, and easy fabrication.…”

Section: Introductionmentioning

confidence: 99%

In Situ Growth of Hierarchical Ni‐Mn‐O Solid Solution on a Flexible and Porous Ni Electrode for High‐Performance All‐Solid‐State Asymmetric Supercapacitors

Yang³

et al. 2019

Chemistry A European J

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To endow all‐solid‐state asymmetric supercapacitors with high energy density, cycling stability, and flexibility, we design a binder‐free supercapacitor electrode by in situ growth of well‐distributed broccoli‐like Ni0.75Mn0.25O/C solid solution arrays on a flexible and three‐dimensional Ni current collector (3D‐Ni). The electrode consists of a bottom layer of compressed but still porous Ni foam with excellent flexibility and high electrical conductivity, an intermediate layer of interconnected Ni nanoparticles providing a large specific surface area for loading of active substances, and a top layer of vertically aligned mesoporous nanosheets of a Ni0.75Mn0.25O/C solid solution. The resultant 3D‐Ni/Ni0.75Mn0.25O/C cathode exhibits a specific capacitance of 1657.6 mF cm−2 at 1 mA cm−2 and shows no degradation of the capacitance after 10 000 cycles at 3 mA cm−2. The assembled 3D‐Ni/Ni0.75Mn0.25O/C//activated carbon asymmetric supercapacitor has a high specific capacitance of 797.7 mF cm−2 at 2 mA cm−2 and an excellent cycling stability with 85.3 % of capacitance retention after 10 000 cycles at a current density of 3 mA cm−2. The energy density and power density of the asymmetric supercapacitor are up to 6.6 mW h cm−3 and 40.8 mW cm−3, respectively, indicating a fairly promising future of the flexible 3D‐Ni/Ni0.75Mn0.25O/C electrode for efficient energy storage applications.

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Section: Introductionmentioning

confidence: 99%

In Situ Growth of Hierarchical Ni‐Mn‐O Solid Solution on a Flexible and Porous Ni Electrode for High‐Performance All‐Solid‐State Asymmetric Supercapacitors

Yang³

et al. 2019

Chemistry A European J

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“…As displayed in Figure b, the Raman spectra of the NG‐PPy and G‐PPy catalysts show characteristic D and G bands at around 1345 and 1570 cm −1 , respectively, implying that defective sites were present in the samples. A 2D band peak appeared for both the samples at about 2700 cm −1 , which implies a phonon transition of A 1g symmetry and the presence of the required defect sites for activation . The position of the D, G, and 2D bands for the synthesized samples are given in Table S1 (in the Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…The general expression that gives the crystallite size ( L a ) from the integrated intensity ratio ( I G / I D ) by using any laser line in the visible range is given by Equation :

true L_{a} = (2.4 \times 1 0^{- 10}) λ_{normall}^{4} ([], \frac{I_{G}}{I_{D}})

…”

Section: Methodsmentioning

confidence: 99%

Polymer‐Assisted Electrophoretic Synthesis of N‐Doped Graphene‐Polypyrrole Demonstrating Oxygen Reduction with Excellent Methanol Crossover Impact and Durability

Mohmad

Sarkar

Biswas

et al. 2020

Chemistry A European J

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The designa nd synthesis of metal-free catalysts with superior electrocatalytic activity,h ighd urability,l ow cost, and under mild conditions is extremely desirable but remains challenging. To address this problem,apolymer-assisted electrochemical exfoliation technique of graphitei n the presence of an aqueous acidic mediumi sr eported. This simple, cost-effective,a nd mass-scale production approach could open the possibility for the synthesis of high-quality nitrogen-doped graphene-polypyrrole (NG-PPy). The NG-PPy catalyst displays an improved half wave potential (E 1/2 = 0.77 V) in alkaline medium compared with G-PPy (E 1/2 = 0.66 V). Most importantly,t his catalystd emonstrates excellent stability with high methanol tolerance, and it outperforms the commercial Pt/C catalyst and other previouslyr e-portedm etal-free catalysts. The content of graphitic nitrogen atoms is the key factor for the enhancement of electrocatalytic activityt owards oxygen reduction reactions (ORR). Interestingly,t he NG-PPy catalystc an be used as ac athode materiali naz inc-airb attery,w hich demonstrates ah igher peak powerd ensity (59 mW cm À2)t han G-PPy (36.6 mW cm À2), highlighting the importance of the low-cost materials ynthesis approach towards the development of metal-free efficient ORR catalysts for fuel cell and metal-air battery applications.R emarkably, the polymer-assisted electrophoretic exfoliation of graphite with ah igh yield (% 88 wt %) of few-layer graphene flakesc ould pave the way towardst he mass production of high-quality graphene for a varietyo fapplications.

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“…In recent years, laser-based technologies have been used for SCs in laser-derived graphene microfabrication and preparation from graphene oxides [163,164] or polymers [32,165,166]. In 2012, using LightScribe DVD burner, Kaner et al [25] directly laser-reduced the GO to laser-scribed graphene (LSG) in one step for scalable fabrication of SCs, which led to the microfabrication of many LSG electrodes and flexible SCs.…”

Section: Supercapacitorsmentioning

confidence: 99%

Laser Synthesis and Microfabrication of Micro/Nanostructured Materials Toward Energy Conversion and Storage

et al. 2021

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Nanomaterials are known to exhibit a number of interesting physical and chemical properties for various applications, including energy conversion and storage, nanoscale electronics, sensors and actuators, photonics devices and even for biomedical purposes. In the past decade, laser as a synthetic technique and laser as a microfabrication technique facilitated nanomaterial preparation and nanostructure construction, including the laser processing-induced carbon and non-carbon nanomaterials, hierarchical structure construction, patterning, heteroatom doping, sputtering etching, and so on. The laser-induced nanomaterials and nanostructures have extended broad applications in electronic devices, such as light–thermal conversion, batteries, supercapacitors, sensor devices, actuators and electrocatalytic electrodes. Here, the recent developments in the laser synthesis of carbon-based and non-carbon-based nanomaterials are comprehensively summarized. An extensive overview on laser-enabled electronic devices for various applications is depicted. With the rapid progress made in the research on nanomaterial preparation through laser synthesis and laser microfabrication technologies, laser synthesis and microfabrication toward energy conversion and storage will undergo fast development.

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Ultralong cycle life and outstanding capacitive performance of a 10.8 V metal free micro-supercapacitor with highly conducting and robust laser-irradiated graphene for an integrated storage device

Abstract: Interconnected conducting porous graphene as supercapacitive material as well as current collector for integrated metal-free microsupercapacitor (MSC) having ultra-long cycle life and outstanding capacitive performance.

Cited by 113 publications

References 50 publications

In Situ Growth of Hierarchical Ni‐Mn‐O Solid Solution on a Flexible and Porous Ni Electrode for High‐Performance All‐Solid‐State Asymmetric Supercapacitors

In Situ Growth of Hierarchical Ni‐Mn‐O Solid Solution on a Flexible and Porous Ni Electrode for High‐Performance All‐Solid‐State Asymmetric Supercapacitors

Polymer‐Assisted Electrophoretic Synthesis of N‐Doped Graphene‐Polypyrrole Demonstrating Oxygen Reduction with Excellent Methanol Crossover Impact and Durability

Laser Synthesis and Microfabrication of Micro/Nanostructured Materials Toward Energy Conversion and Storage

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