Ultra-fast electro-reduction and activation of graphene for high energy density wearable supercapacitor asymmetrically designed with MXene

Karim, Golam Masud; Dutta, Pronoy; Majumdar, Abhisek; Patra, Amalika; Deb, Sankha; Das, Santabrata; Dambhare, Neha V; Rath, Arup K.; Maiti, Uday Narayan

doi:10.1016/j.carbon.2022.11.054

Cited by 19 publications

(11 citation statements)

References 56 publications

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“…A comparison of GA-KOH sample performance with previously reported materials is shown in Figure 5b, indicating that the photoactivated graphene exhibits excellent supercapacitor performances. [34][35][36][37][38][39]…”

Section: Resultsmentioning

confidence: 99%

Solar‐Photoactivated Nanoporous Graphene Aerogel Flowers for High‐Performance Supercapacitors

Xu,

Liu,

Zhou

et al. 2023

Solar RRL

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Supercapacitors are gaining popularity as potential energy‐storage devices due to their efficiency and environmentally sustainable features. Among the extensive range of 2D materials utilized in energy storage, graphene is particularly noteworthy for its exceptional physicochemical properties. Graphene aerogels (GAs) have great potential for supercapacitor application due to their porous structure and, as such, are widely researched. However, enhancing the capacity performance with easy and low‐energy processes is still facing challenges. Here, a facile, low‐cost, and environmentally friendly photoactivation method on GAs is proposed to address this problem. Nanoporous GA flowers with higher specific surface area are formed and the corresponding capacitance can be achieved to 264 F g−1. After 10 000 cycles at the current density of 10 A g−1, the measured electrode's cycle efficiency is found to be 80.9%, further emphasizing its remarkable performance. The unparalleled performance confirms the reliability of this method as compared to traditional activation methods while being cost‐effective and environmentally friendly.

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Section: Resultsmentioning

confidence: 99%

Solar‐Photoactivated Nanoporous Graphene Aerogel Flowers for High‐Performance Supercapacitors

Xu,

Liu,

Zhou

et al. 2023

Solar RRL

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“…Recently, research on methods for processing carbon materials using fast joule heating has gained much interest [22]. This method can be used to activate oxidized carbon materials [23]. The fast joule heating technique involves the rapid reduction of oxidized material during flash heating, associated with a large discharge current.…”

Section: Introductionmentioning

confidence: 99%

Fast Joule Heating for the Scalable and Green Production of Graphene with a High Surface Area

Evseev,

Prokopiev,

Dmitriev

et al. 2024

Materials

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The rapid development of electric vehicles, unmanned aerial vehicles, and wearable electronic devices has led to great interest in research related to the synthesis of graphene with a high specific surface area for energy applications. However, the problem of graphene synthesis scalability, as well as the lengthy duration and high energy intensity of the activation processes of carbon materials, are significant disadvantages. In this study, a novel reactor was developed for the green, simple, and scalable electrochemical synthesis of graphene oxide with a low oxygen content of 14.1%. The resulting material was activated using the fast joule heating method. The processing of mildly oxidized graphene with a high-energy short electrical pulse (32 ms) made it possible to obtain a graphene-based porous carbon material with a specific surface area of up to 1984.5 m2/g. The increase in the specific surface area was attributed to the rupture of the original graphene flakes into smaller particles due to the explosive release of gaseous products. In addition, joule heating was able to instantly reduce the oxidized graphene and decrease its electrical resistance from >10 MΩ/sq to 20 Ω/sq due to sp2 carbon structure regeneration, as confirmed by Raman spectroscopy. The low energy intensity, simplicity, and use of environment-friendly chemicals rendered the proposed method scalable. The resulting graphene material with a high surface area and conductivity can be used in various energy applications, such as Li-ion batteries and supercapacitors.

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“…35 Maiti et al proposed a pulse Joule heating strategy for the activation of graphene to develop an ASC with a high energy density of 107.8 μWh cm −2 . 36 Wang et al fabricated a highly efficient symmetric supercapacitor by integrating holey graphene oxide (HGO) and a metal−organic framework. 37 In order to further explore next-generation CF-based highperformance supercapacitors, there are some issues that urgently need to be addressed: (1) enhanced conductivity and increased storage capacity of low-cost electrode materials are required; (2) the drawback of slow ion diffusion kinetics and short transport paths for electrolyte ion/electrons, which arise from lack of ideal transport channels, should be overcome; (3) employing protective layers is necessary for achieving long-term cycle stability.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al designed γ-Fe 2 O 3 /holey rGO nanocomposites, which offered a facile strategy for designing superior anodes for lithium-ion batteries . Maiti et al proposed a pulse Joule heating strategy for the activation of graphene to develop an ASC with a high energy density of 107.8 μWh cm –2 . Wang et al fabricated a highly efficient symmetric supercapacitor by integrating holey graphene oxide (HGO) and a metal–organic framework …”

Section: Introductionmentioning

confidence: 99%

Fabrication of Porous Reduced Graphene Oxide Encapsulated Cu(OH)₂ Core–shell Structured Carbon Fiber-Based Electrodes for High-Performance Flexible Supercapacitors

Jin,

Liu,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Ultra-fast electro-reduction and activation of graphene for high energy density wearable supercapacitor asymmetrically designed with MXene

Cited by 19 publications

References 56 publications

Solar‐Photoactivated Nanoporous Graphene Aerogel Flowers for High‐Performance Supercapacitors

Solar‐Photoactivated Nanoporous Graphene Aerogel Flowers for High‐Performance Supercapacitors

Fast Joule Heating for the Scalable and Green Production of Graphene with a High Surface Area

Fabrication of Porous Reduced Graphene Oxide Encapsulated Cu(OH)₂ Core–shell Structured Carbon Fiber-Based Electrodes for High-Performance Flexible Supercapacitors

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Ultra-fast electro-reduction and activation of graphene for high energy density wearable supercapacitor asymmetrically designed with MXene

Cited by 19 publications

References 56 publications

Solar‐Photoactivated Nanoporous Graphene Aerogel Flowers for High‐Performance Supercapacitors

Solar‐Photoactivated Nanoporous Graphene Aerogel Flowers for High‐Performance Supercapacitors

Fast Joule Heating for the Scalable and Green Production of Graphene with a High Surface Area

Fabrication of Porous Reduced Graphene Oxide Encapsulated Cu(OH)2 Core–shell Structured Carbon Fiber-Based Electrodes for High-Performance Flexible Supercapacitors

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Fabrication of Porous Reduced Graphene Oxide Encapsulated Cu(OH)₂ Core–shell Structured Carbon Fiber-Based Electrodes for High-Performance Flexible Supercapacitors