All-solid-state asymmetric supercapacitors based on cobalt hexacyanoferrate-derived CoS and activated carbon

Subramani, K.; Sudhan, Narayanan; Divya, R.

doi:10.1039/c6ra27331a

Cited by 195 publications

(109 citation statements)

References 48 publications

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“…At various rates, the energy densities ranges from 48.3 to 26.1 Wh kg −1 with corresponding power densities of 744 to 6919 W kg −1 . These values are significantly higher and/or comparable to other previously reported ASCs, such as CuS nanoparticles//AC ( E =17.7 Wh kg −1 , P =504 W kg −1 ), CuS microspheres//AC ( E =15.1 Wh kg −1 at P =330 W kg −1 ), SnO 2 //RGO ( E =22.8 Wh kg −1 at P =850 W kg −1 ), CuS/3DG//3DG ( E =5 Wh kg −1 at P =450 W kg −1 ), Co 9 S 8 //AC ( E =31.4 Wh kg −1 at P =200 W kg −1 ), and CoS//AC ( E =5.3 Wh kg −1 at P =1800 W kg −1 ) …”

Section: Resultssupporting

confidence: 85%

Flexible Binder‐Free CuS/Polydopamine‐Coated Carbon Cloth for High Voltage Supercapacitors

2018

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Interfacial engineering is important to achieve high electrochemical performance in energy storage devices. It becomes particularly important for flexible devices, where stresses at the interface between the active material and current collector can be significant upon flexing. Here, we describe simple yet powerful method to tune surface properties, such as wettability and adhesion of carbon cloth (CC) as current collectors to active materials via using dopamine chemistry. We show how a polydopamine‐coated CC (p‐CC) exhibits strong adhesion with CuS nanosheets, enabling negligible capacitance fading after over 100 folding cycles. The CuS/p‐CC system exhibits attractive electrochemical properties, including a high specific capacitance (337 F g−1 at 0.5 A g−1), good rate capability (81.9 % capacitance retention at a rate of 10 A g−1), and excellent capacitance retention (about 96.1 % after 1000 cycles). An asymmetric supercapacitor fabricated by assembly of RGO/p‐CC and CuS/p‐CC provides a stable cell voltage up to 1.5 V and energy and power densities of up to 48.3 Wh kg−1 and 6919 W kg−1 on a full electrode basis.

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Section: Resultssupporting

confidence: 85%

Flexible Binder‐Free CuS/Polydopamine‐Coated Carbon Cloth for High Voltage Supercapacitors

2018

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“…These are higher than the previous studies reported, [62][63][64][65][66] such as Co 9 S 8 //AC. NC@CoSe 2 //Co-NC@Fe 2 O 3 shows the maximum power density of 8.9 kW/kg at an energy density of 14 Wh/kg.…”

Section: Electrochemical Propertiescontrasting

confidence: 70%

Carbon Nanoarrays Embedded with Metal Compounds for High‐Performance Flexible Supercapacitors

Zhu

Guan

Cai

et al. 2019

Batteries & Supercaps

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Metal-organic frameworks (MOFs)-derived nanoarrays have been widely used as electrode materials in energy storage applications with the unique morphology and large specific surface area. Herein, we report a series of N-doped carbon arrays embedded with different metal compounds (noted as NC@Co 3 O 4 , NC@CoSe 2 and NC@CoS 2 ), which have been derived from a Co-based MOF through simple fabrication processes. The resulted structures have high surface-to-volume ratio and short charge-transfer paths in electrochemical reactions, which greatly benefit the energy storage performance. An asymmetric supercapacitor of NC@CoS 2 //Co-NC@Fe 2 O 3 is also demonstrated, which has a power density up to 23.5 kW/kg and illustrates good cycling stability after long-time rapid charging and discharging. This work demonstrates a promising way to develop MOF-derived nanoarrays for flexible energy storage devices.

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“…[73] Research activities on HSCs are primarily focused on three different configurations; asymmetric, [74] composite [75,76] and battery type SCs. Combining both charge storage mechanisms (non-Faradaic and Faradaic) to achieve higher energy and power density is utilized in hybrid supercapacitors (HSCs).…”

Section: Types Of Supercapacitorsmentioning

confidence: 99%

Metal Oxynitrides as Promising Electrode Materials for Supercapacitor Applications

2019

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In the past decade, due to the demands of the electrochemical energy storage sector, there has been a quest for novel supercapacitor materials that offer champion storage characteristics. Metal oxynitrides are seen as potential candidates for electrochemical energy storage owing to their high cyclability (up to 10 5 cycles), good intrinsic conductivity (30000-35000 S cm À 1 ), good wettability, corrosion resistance, and chemical inertness. In this review, the use of metal oxynitrides as electrode materials for supercapacitors is discussed. A comparison of oxynitrides with other electrode materials, such as metal oxides, carbon-based materials, and their composites, is made. This study also places emphasis on the impact of synthesis techniques on the final properties of the material. In view of this critical analysis, we envisage future directions for this category of energy storage materials.[a] U.

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All-solid-state asymmetric supercapacitors based on cobalt hexacyanoferrate-derived CoS and activated carbon

Abstract: All-solid-state flexible asymmetric supercapacitors fabricated using CoS and AC showed a high cell voltage, high specific capacitance, and high energy density of 5.3 W h kg−1 with excellent electrochemical stability.

Cited by 195 publications

References 48 publications

Flexible Binder‐Free CuS/Polydopamine‐Coated Carbon Cloth for High Voltage Supercapacitors

Flexible Binder‐Free CuS/Polydopamine‐Coated Carbon Cloth for High Voltage Supercapacitors

Carbon Nanoarrays Embedded with Metal Compounds for High‐Performance Flexible Supercapacitors

Metal Oxynitrides as Promising Electrode Materials for Supercapacitor Applications

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