Customizing oxygen–containing functional groups for reduced graphene oxide film supercapacitor with high volumetric performance

Zhao, Xin; Zhou, You; Xu, Yali; Huang, Cong; Shen, Yuping; Zhang, Yan; Fan, Zefu; Tang, Qunli; Hu, Aiping; Chen, Xiaohua

doi:10.1016/j.est.2022.104642

Cited by 10 publications

(2 citation statements)

References 63 publications

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“…The TG results (Figure 2g) after sufficient drying show that GO and GO-CTAB undergo significant mass decay from 150 to 230 °C, which is attributed to the shedding of some oxygen-containing functional groups. [30] After the introduction of CTAB, GO-CTAB exhibits higher thermal stability below the decomposition temperature of CTAB. In brief, the compounding of CTAB with GO do not produce new functional groups, but the interaction between CTAB and the functional groups of GO results in a change in the stability of the oxygen-containing functional groups of GO.…”

Section: The Modified Synthesis and Mechanism Of Go-snpmentioning

confidence: 99%

Design of Size‐Controlled Sulfur Nanoparticle Cathodes for Lithium‐Sulfur Aviation Batteries

Liu

Cheng

Wang

et al. 2023

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Lithium–sulfur (Li–S) battery has been considered as a strong contender for commercial aerospace battery, but the commercialization requires Ah‐level pouch cells with both efficient discharge at high rates and ultra‐high energy density. In this paper, the application of lithium–sulfur batteries for powering drones by using the cathode of highly dispersed sulfur nanoparticles with well‐controlled particle sizes have been realized. The sulfur nanoparticles are prepared by a precipitation method in an eco‐friendly and efficient way, and loaded on graphene oxide‐cetyltrimethylammonium bromide by molecular grafting to realize a large‐scale fabrication of sulfur‐based cathodes with superior electrochemical performance. A button cell based on the cathode exhibits an excellent discharge capacity of 62.8 mAh cm−2 at a high sulfur loading of 60 mg cm−2 (i.e., 1046.7 mAh g−1). The assembled miniature pouch cell (PCmini) shows a discharge capacity of 130 mAh g−1, while the formed Ah‐level pouch cell (PCAh) achieves energy density of 307 Wh kg−1 at 0.3C and 92 Wh kg−1 at 4C. Especially, a four‐axis propeller drone powered by the PC has successfully completed a long flight (>3 min) at high altitudes, demonstrating the practical applicability as aviation batteries.

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Section: The Modified Synthesis and Mechanism Of Go-snpmentioning

confidence: 99%

Design of Size‐Controlled Sulfur Nanoparticle Cathodes for Lithium‐Sulfur Aviation Batteries

Liu

Cheng

Wang

et al. 2023

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“…Moreover, graphene has been widely used in supercapacitors due to its abundant active sites and high conductivity. However, graphene sheets with a two-dimensional (2D) structure tend to aggregate easily during the preparation process, leading to a reduced surface area, decreased ion migration capability, and hindrance for a large amount of reactants to access the active sites, resulting in the decline of the electrode performances. , In contrast, three-dimensional (3D) porous graphene offers the advantages of high surface areas and electrical conductivity. Furthermore, when combined with other materials, it can enhance the ion transfer rate and reduce the aggregation of active substances during charge–discharge processes, thereby improving the electrochemical performance and structural stability of composite materials. , Therefore, 3D porous graphene-encapsulated heterojunctions were designed.…”

Section: Introductionmentioning

confidence: 99%

Microcubes of ZnSe–SnSe₂ Encapsulated within Graphene for High-Performance Asymmetric Supercapacitors

Zhao,

Feng,

Zhou

et al. 2024

ACS Appl. Nano Mater.

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High-capacity SnSe2 cathode materials combine the advantages of conversion and alloying reactions, showing great prospects in supercapacitors. However, they have poor cycling performance and low electronic conductivity. To effectively improve their electrochemical performance, a bimetallic selenide heterostructure was constructed and a three-dimensional graphene (3DG) carbon layer was encapsulated. 3DG increases the specific surface areas of the material, stabilizes the internal structures, and promotes the reaction kinetics. The obvious lattice distortions and mismatches at the ZnSe–SnSe2 heterointerfaces generate a large number of crystal defects and active sites for the adsorption/desorption of OH– ions, which is beneficial for the insertion and extraction of ions during the cycling processes and further enhances the electronic conductivity of the electrode material. Benefiting from these two strategies, 3DG/ZnSe–SnSe2 exhibits a high specific capacity of 1515.2 F g–1 at 1 A g–1 and maintains a capacity retention rate of 90.1% after 3000 cycles at 5 A g–1. Furthermore, the asymmetric supercapacitor 3DG/ZnSe–SnSe2//AC assembled with activated carbon (AC) exhibits excellent electrochemical performance, demonstrating an energy density of 25.3 Wh kg–1 at 750 W kg–1 and a remarkable capacity retention rate of 91.3% after 20,000 cycles at 5 A g–1.

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Biochar-Based Nanocomposite Materials: Types, Characteristics, Physical Activation, and Diverse Application Scenarios

Verma

Dutta

Kumar

et al. 2023

Advances in Science, Technology &Amp; Innovation

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Customizing oxygen–containing functional groups for reduced graphene oxide film supercapacitor with high volumetric performance

Cited by 10 publications

References 63 publications

Design of Size‐Controlled Sulfur Nanoparticle Cathodes for Lithium‐Sulfur Aviation Batteries

Design of Size‐Controlled Sulfur Nanoparticle Cathodes for Lithium‐Sulfur Aviation Batteries

Microcubes of ZnSe–SnSe₂ Encapsulated within Graphene for High-Performance Asymmetric Supercapacitors

Biochar-Based Nanocomposite Materials: Types, Characteristics, Physical Activation, and Diverse Application Scenarios

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Customizing oxygen–containing functional groups for reduced graphene oxide film supercapacitor with high volumetric performance

Cited by 10 publications

References 63 publications

Design of Size‐Controlled Sulfur Nanoparticle Cathodes for Lithium‐Sulfur Aviation Batteries

Design of Size‐Controlled Sulfur Nanoparticle Cathodes for Lithium‐Sulfur Aviation Batteries

Microcubes of ZnSe–SnSe2 Encapsulated within Graphene for High-Performance Asymmetric Supercapacitors

Biochar-Based Nanocomposite Materials: Types, Characteristics, Physical Activation, and Diverse Application Scenarios

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Microcubes of ZnSe–SnSe₂ Encapsulated within Graphene for High-Performance Asymmetric Supercapacitors