Performance of Microporous Carbon Electrodes for Supercapacitors: Comparing Graphene with Disordered Materials

Méndez-Morales, Trinidad; Ganfoud, Nidhal; Li, Zhujie; Haefele, Matthieu; Rotenberg, Benjamin; Salanne, Mathieu

doi:10.26434/chemrxiv.7171736

Cited by 7 publications

(9 citation statements)

References 15 publications

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“…Hollow mesoporous carbon sphere (HCS) materials have been a focus of rapid innovations for their interesting properties in many fields, 1,2 such as heterogeneous catalysis, 3 adsorption, 4 and energy storage or platforms for drug delivery, 5 because of their regular spherical morphologies, large cavity, high surface areas, and tunable porosity. 6,7 Of particular interest, ascribing to the short diffusion length for reactants to access the active sites in the thin shells, large cavity for charge containment, and volume expansion of HCS, it is potential electrode material in supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Confined-Space Pyrolysis of Polystyrene/Polyacrylonitrile for Nitrogen-Doped Hollow Mesoporous Carbon Spheres with High Supercapacitor Performance

Liu

et al. 2019

ACS Appl. Energy Mater.

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Nitrogen-doped hollow mesoporous carbon spheres have drawn much attention in many applications, including adsorption, catalysis and energy storage, etc. because of their hollow structure, thin carbon shell, and high specific surface area. Herein, a confined-space pyrolysis method is applied for the preparation of nitrogen-doped hollow mesoporous carbon sphere with uniform spherical morphology, relative large cavity, and high specific surface area, using polystyrene/polyacrylonitrile (PS/PAN, or PSPAN) spheres as a carbon precursor. In this process, mesoporous silica shell is coated on the PSPAN spheres to provide a confined space, in which a regular spherical morphology of nitrogen-doped hollow mesoporous carbon sphere can be obtained after the process of pyrolysis. The in situ generation of CO2 and H2O from PSPAN spheres play the role of active agent, creating a rich and uniform mesoporous distribution for nitrogen-doped hollow mesoporous carbon spheres, which is conducive to fast charge transport. Rich nitrogen content in PAN results in in situ nitrogen doping. Adjusting the PS:PAN ratio can realize the adjustment of diameter and cavity size. As an electrode in a supercapacitor, the nitrogen-doped hollow mesoporous carbon sphere exhibits outstanding performance with large specific capacitance, indicating its excellent promise in energy storage.

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Section: Introductionmentioning

confidence: 99%

Confined-Space Pyrolysis of Polystyrene/Polyacrylonitrile for Nitrogen-Doped Hollow Mesoporous Carbon Spheres with High Supercapacitor Performance

Liu

et al. 2019

ACS Appl. Energy Mater.

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“…All initialisation and setup phases were left untouched, but the roughly 2K lines of C++ for the computationally intensive kernels have been rewritten in the MaxJ language, compiled with the Maxeler toolchain and linked with the original code as a dynamic library. These implementations have been evaluated on the test-case used in production in [30] that contains 42490 electrode atoms. In the context of material science for supercapacitors, this is a large test case.…”

Section: B Supercapacitor Simulationmentioning

confidence: 99%

EXA2PRO: A Framework for High Development Productivity on Heterogeneous Computing Systems

Papadopoulos

Soudris

Keßler

et al. 2022

IEEE Trans. Parallel Distrib. Syst.

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Programming upcoming exascale computing systems is expected to be a major challenge. New programming models are required to improve programmability, by hiding the complexity of these systems from application developers. The EXA2PRO programming framework aims at improving developers' productivity for applications that target heterogeneous computing systems. It is based on advanced programming models and abstractions that encapsulate low-level platform-specific optimizations and it is supported by a runtime that handles application deployment on heterogeneous nodes. It supports a wide variety of platforms and accelerators (CPU, GPU, FPGAbased Data-Flow Engines), allowing developers to efficiently exploit heterogeneous computing systems, thus enabling more HPC applications to reach exascale computing. The EXA2PRO framework was evaluated using four HPC applications from different domains. By applying the EXA2PRO framework, the applications were automatically deployed and evaluated on a variety of computing architectures, enabling developers to obtain performance results on accelerators, test scalability on MPI clusters and productively investigate the degree by which each application can efficiently use different types of hardware resources.

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“…Structure-property investigations to determine how performance varies with electrode structure are challenging with traditional EDLCs as many use porous carbons as the electrode material 7,8 . These tend to have poorly defined structures that are difficult to characterize, leading to structure-property investigations with conflicting results [9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

Insights Into the Electric Double-Layer Capacitance of the Two-Dimensional Electrically Conductive Metal-Organic Framework Cu3(HHTP)2

Gittins

Balhatchet²,

Chen³

et al. 2021

Preprint

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Two-dimensional electrically conductive metal-organic frameworks (MOFs) have emerged as promising model electrodes for use in electric double-layer capacitors (EDLC). Here, we demonstrate the high capacitive performance of the framework Cu3(HHTP)2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) with an organic electrolyte and compare its behaviour with the previously reported analogue, Ni3(HITP)2 (HITP = 2,3,6,7,10,11-hexaiminotriphenylene). At low current densities of 0.04 – 0.05 A g−1, Cu3(HHTP)2 electrodes exhibit a specific capacitance of 110 – 114 F g−1 and show modest capacitance retentions (66 %) at current densities up to 2 A g−1 , mirroring the performance of Ni3(HITP)2 and suggesting that capacitive performance is largely independent of the identity of the metal node and organic linker molecule. However, we find a limited cell voltage window of 1.3 V and only moderate capacitance retention (86 %) over 30,000 cycles at a moderate current density of 1 A g−1, both significantly lower than state-of-the-art porous carbons. These important insights will aid the design of future conductive MOFs with improved performance in EDLCs.

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Performance of Microporous Carbon Electrodes for Supercapacitors: Comparing Graphene with Disordered Materials

Cited by 7 publications

References 15 publications

Confined-Space Pyrolysis of Polystyrene/Polyacrylonitrile for Nitrogen-Doped Hollow Mesoporous Carbon Spheres with High Supercapacitor Performance

Confined-Space Pyrolysis of Polystyrene/Polyacrylonitrile for Nitrogen-Doped Hollow Mesoporous Carbon Spheres with High Supercapacitor Performance

EXA2PRO: A Framework for High Development Productivity on Heterogeneous Computing Systems

Insights Into the Electric Double-Layer Capacitance of the Two-Dimensional Electrically Conductive Metal-Organic Framework Cu3(HHTP)2

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