High performance symmetric supercapacitor based on zinc hydroxychloride nanosheets and 3D graphene-nickel foam composite

Khamlich, S.; Abdullaeva, Zh.; Kennedy, J.; Mâaza, M.

doi:10.1016/j.apsusc.2017.02.095

Cited by 138 publications

(23 citation statements)

References 55 publications

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“…Metal Foams as Highly Conductive and Mechanically Strong Electrode Scaffolds : Metal foams have been frequently studied as a type of electrode scaffold for different types of electrochemical devices, including lithium ion batteries, lithium‐sulfur batteries, supercapacitors, etc . The high conductivity, high porosity and mechanical strength make metal foams an idea candidate for electrode scaffold.…”

Section: Controlling Both Etn and Itn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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portable electronics, cell phones, electrical vehicles (EVs), aerospace, etc. For advanced batteries, higher and higher energy density and/or power density, long cycling stability, good device safety, and low-cost are the primary goals. Since the energy density is mainly dependent on the specific capacity and loading level of active materials (AMs), AMs usually dominate the volume and weight inside the batteries. Because of this, tremendous efforts have been focused on high-performance AMs. However, the electrochemical performance of energy storage devices (ESDs) is fundamentally determined by a collective contribution or teamwork of all the components: AMs, electrolyte, separator, conductive agent, binders, etc. More importantly, with the increasing interests on high-capacity AMs (e.g., silicon, sulfur, Li-rich cathode, etc.), it becomes very clear that the "traffic system" (i.e., the charge transport system) plays very critical roles in the performance of the high-capacity AMs. Take silicon anode for example, a durable and flexible conductive network inside the electrode composite has been vital for addressing the big volume change issue. In this case, high-performance binders and conductive agent that can generate advanced conductive network are the keys. [2] In addition, with the increasing interests on EVs and flexible electronics, building a powerful and robust charge transport system inside ESDs is an urgent and critical task to support fast charging/ discharging capability and even flexibility of ESDs. In short, with the fast development of energy storage technologies, EVs, cell phones, etc., there is a critical, urgent, and challenging task on building powerful and durable charge transport system in next-generation advanced ESDs. Charge Transport Inside ESDsThe thriving of big cities highly relies on a powerful traffic system that transports the people, foods, products, etc. Similar to this picture, ESDs are powered by the transportation of charges, including both ions and electrons. As illustrated in Figure 1a, one can analogize the charge transport system and AMs in the electrodes of ESDs to the traffic system and buildings (i.e., host system of people), respectively. This analogy example not only help to explain the relationship between The charge transport system in an energy storage device (ESD) fundamentally controls the electrochemical performance and device safety. As the skeleton of the charge transport system, the "traffic" networks connecting the active materials are primary structural factors controlling the transport of ions/electrons. However, with the development of ESDs, it becomes very critical but challenging to build traffic networks with rational structures and mechanical robustness, which can support high energy density, fast charging and discharging capability, cycle stability, safety, and even device flexibility. This is especially true for ESDs with high-capacity active materials (e.g., sulfur and silicon), which show notable volume change during cycling. Therefore, there is an ur...

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Section: Controlling Both Etn and Itn In Composite Electrodesmentioning

confidence: 99%

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Wang

Min

et al. 2018

Advanced Materials

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“…In general, two kinds of charge‐storage mechanisms are employed in the supercapacitor applications on the basis of the electrode materials. The first one is EDLC, ie, electrical double‐layer capacitance mechanism, in which the charge storage occurs at the interface of an electrode and electrolyte . This type of electrochemical process is followed by carbon‐based materials such as carbon nanotubes (CNTs), graphene oxide (GO), and reduced graphene oxide (rGO) .…”

Section: Introductionmentioning

confidence: 99%

“…The first one is EDLC, ie, electrical double-layer capacitance mechanism, in which the charge storage occurs at the interface of an electrode and electrolyte. 3,4 This type of electrochemical process is followed by carbon-based materials such as carbon nanotubes (CNTs), 5 graphene oxide (GO), 6 and reduced graphene oxide (rGO). 7 The second one is a pseudocapacitance mechanism, in which redox reaction takes place between the electrode and electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Cauliflower‐shaped ternary nanocomposites with enhanced power and energy density for supercapacitors

et al. 2019

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Summary The present research work aimed to study the electrochemical performance of the rGO/PPY/PANI ternary nanocomposite electrodes for supercapacitor applications. The nanocomposites have been prepared by physical blending of rGO with conducting polymers PANI and PPY in five different ratios. The prepared nanocomposites were examined by XRD, IR, Raman, SEM, and XAS characterizations, and from the results, it was found that ternary nanocomposites formed in cauliflower shape, in which PPY and PANI nanoparticles are decorated on to the rGO matrix. In addition, the electrochemical performance of the prepared nanocomposites were studied using cyclic voltammetry, galvanostatic charge‐discharge, and electrochemical impedance spectroscopic studies. The highest values of capacitance, energy density, and power density values achieved were 317.5 F/g, 254 Wh/kg, and 1508.9 W/kg for nanocomposite, respectively, as expected from the synergistic properties of two types of electrode materials resulting in the nanocomposites with hybrid and improved properties. Further, the cyclic stability was also analyzed by performing 4000 long cycles, and the retained capacitance during such long cycles indicates the high potential of rGO/PPY/PANI ternary nanocomposites as electrodes for future energy requirement.

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“…Among conductive materials, activated carbon-based materials are the most promising candidates for supercapacitor applications due to their unique characteristics of large surface area, high electrochemical stability and conductivity [ 21 , 22 , 23 , 24 ]. In carbon materials, bamboo charcoal draws research attention for its extraordinarily porous microstructure, cost-efficiency and high absorptive capacity [ 22 , 23 , 25 , 26 , 27 , 28 , 29 , 30 ]. Li et al studied water bamboo-derived porous carbon with a maximum specific capacitance of 268 F g −1 at a current density of 1 A g −1 in 6 M of KOH electrolyte and showed good capacity retention of 97.28%, even over 5000 cycles at a current density of 10 A g −1 [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…In carbon materials, bamboo charcoal draws research attention for its extraordinarily porous microstructure, cost-efficiency and high absorptive capacity [ 22 , 23 , 25 , 26 , 27 , 28 , 29 , 30 ]. Li et al studied water bamboo-derived porous carbon with a maximum specific capacitance of 268 F g −1 at a current density of 1 A g −1 in 6 M of KOH electrolyte and showed good capacity retention of 97.28%, even over 5000 cycles at a current density of 10 A g −1 [ 25 ]. Yang et al also synthesized BC by KOH activation, and the specific capacitance retention was more than 91% after 3000 cycles [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Radiation Method for Preparing MnO2/BC Monolith Hybrids with Outstanding Supercapacitance Performance

Yang

Liu

et al. 2018

Nanomaterials

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A novel facile process for fabrication of amorphous MnO2/bamboo charcoal monolith hybrids (MnO2/BC) for potential supercapacitor applications using γ-irradiation methods is described. The structural, morphological and electrochemical properties of the MnO2/BC hybrids have been investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques. The combination of BC (electrical double layer charge) and MnO2 (pseudocapacitance) created a complementary effect, which enhanced the specific capacitance and good cyclic stability of the MnO2/BC hybrid electrodes. The MnO2/BC hybrids showed a higher specific capacitance (449 F g−1 at the constant current density of 0.5 A g−1 over the potential range from –0.2 V to 0.8 V), compared with BC (101 F g−1) in 1 M of Na2SO4 aqueous electrolyte. Furthermore, the MnO2/BC hybrid electrodes showed superior cycling stability with 78% capacitance retention, even after 10,000 cycles. The experimental results demonstrated that the high performance of MnO2/BC hybrids could be a potential electrode material for supercapacitors.

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High performance symmetric supercapacitor based on zinc hydroxychloride nanosheets and 3D graphene-nickel foam composite

Cited by 138 publications

References 55 publications

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Strategies for Building Robust Traffic Networks in Advanced Energy Storage Devices: A Focus on Composite Electrodes

Cauliflower‐shaped ternary nanocomposites with enhanced power and energy density for supercapacitors

A Novel Radiation Method for Preparing MnO2/BC Monolith Hybrids with Outstanding Supercapacitance Performance

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