Preparation, characterization and the supercapacitive behaviors of electrochemically reduced graphene quantum dots/polypyrrole hybrids

Shi, Xianming; Yin, Zheng‐Zhi; Xu, Jiale; Li, Shan; Wang, Chengchao; Wang, Binghu; Qin, Yong; Kong, Yong

doi:10.1016/j.electacta.2021.138435

Cited by 20 publications

(9 citation statements)

References 50 publications

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“…She et al elaborated on the synthesis of graphene quantum dots and polypyrrole hybrids. The electrochemically reduced graphene was decorated on the polypyrrole sphere as shown in Figure 1c [49]. Li et al reported core-shell@PANI using citric acid as precursor which follows pyrolysis and NaOH treatment, further the PANI was composited by in situ adsorption polymerization as described in the Figure 1d [50].…”

Section: Electrochemical Processmentioning

confidence: 99%

Polymer Composites with Quantum Dots as Potential Electrode Materials for Supercapacitors Application: A Review

et al. 2022

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Owing to the nanometer size range, Quantum Dots (QDs) have exhibited unique physical and chemical properties which are favourable for different applications. Especially, due to their quantum confinement effect, excellent optoelectronic characteristics is been observed. This considerable progress has not only uplifted the singular usage of QDs, but also encouraged to prepare various hybrid materials to achieve superior efficiency by eliminating certain shortcomings. Such issues can be overcome by compositing QDs with polymers. Via employing polymer composite with QDs (PQDs) for supercapacitor applications, adequate conductivity, stability, excellent energy density, and better specific capacitance is been achieved which we have elaborately discussed in this review. Researchers have already explored various types of polymer nanocomposite with different QDs such as carbonaceous QDs, transition metal oxide/sulphide QDs etc. as electrode material for supercapacitor application. Synthesis, application outcome, benefits, and drawbacks of these are explained to portray a better understanding. From the existing studies it is clearly confirmed that with using PQDs electrical conductivity, electrochemical reactivity, and the charge accumulation on the surface have prominently been improved which effected the fabricated supercapacitor device performance. More comprehensive fundamentals and observations are explained in the current review which indicates their promising scopes in upcoming times.

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Section: Electrochemical Processmentioning

confidence: 99%

Polymer Composites with Quantum Dots as Potential Electrode Materials for Supercapacitors Application: A Review

et al. 2022

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“…Due to the reinforcement of CQDs with CPs, the electrical conductivity increased as well as the specific surface area of CQDs improved, where the active sites for electrode and electrolyte ion interaction enhanced. For instance, Xinmin et al reported the electrochemical properties of GQDs/PPy and ERGQDs/PPy hybrid composites, where showed high specific capacitance due to the amalgamation of EDLC behavior of ERGQDs and pseudocapacitive behavior of PPy, and also GQDs enhance the cyclability in composites 28 . Lanxin Wang et al, reported that AC‐CDs/PPy hybrid has the synergetic enhancement of energy and power densities and specific capacitance 29 …”

Section: Introductionmentioning

confidence: 99%

“…For instance, Xinmin et al reported the electrochemical properties of GQDs/PPy and ERGQDs/PPy hybrid composites, where showed high specific capacitance due to the amalgamation of EDLC behavior of ERGQDs and pseudocapacitive behavior of PPy, and also GQDs enhance the cyclability in composites. 28 Lanxin Wang et al, reported that AC-CDs/PPy hybrid has the synergetic enhancement of energy and power densities and specific capacitance. 29 Hence, we adopted an eco-friendly hybrid electrospray method for the preparation of uniform thin films.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of semi‐flexible carbon quantum dots‐reinforced polypyrrole ( PPy / CQDs ) composite electrodes by hybrid electrospray deposition for high‐performance energy storage device

Dhandapani¹,

Prabhu

Duraisamy³

et al. 2022

Intl J of Energy Research

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Summary A carbon quantum dots‐reinforced polypyrrole (PPy/CQDs) composite electrodes were prepared via the hybrid electrospray method. PPy/CQDs composite shows superior electrochemical performance with a specific capacity (Qg) of 174.21 C g−1 at 1 A g−1 in 3 M KOH aqueous electrolyte. An all‐solid‐state asymmetric supercapacitor (ASC) is composed of PPy/CQDs as a positive electrode and rGO as a negative electrode with PVA/KOH gel electrolyte, which exhibited the specific capacity (Qg) of 79.25 C g−1 at the current density of 1.5 A g−1 with an energy and power density of 26.44 Wh kg−1 and 18 090.82 W kg−1, respectively. An assembled PPy/CQDs//rGO device offers cyclic retention of about 76.8% at 15 A g−1 after 10 000 cycles. The above results confirmed that the as‐prepared PPy/CQDs composite electrode is more suitable for high‐performance‐based semi‐flexible supercapacitor application.

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“…The key requirements of electrode materials are high specific surface area with an appropriate pore structure, 3−5 good electrical conductivity, 6−8 and electrochemical stability. 9,10 Numerous carbonaceous materials, such as activated carbon, 8,11 carbon nanotube, 12 graphene, 13,14 graphene quantum dots, 15 carbon aerogel, 16,17 and carbon nanofibers, 17,18 have been used as active materials for electrodes. Mostly, the active materials and other additives in the form of powder require a binder to hold the materials in the electrodes and on the collectors.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Thus, the efficiency of supercapacitors depends significantly on properties of the electrode materials. The key requirements of electrode materials are high specific surface area with an appropriate pore structure, − good electrical conductivity, − and electrochemical stability. , Numerous carbonaceous materials, such as activated carbon, , carbon nanotube, graphene, , graphene quantum dots, carbon aerogel, , and carbon nanofibers, , have been used as active materials for electrodes. Mostly, the active materials and other additives in the form of powder require a binder to hold the materials in the electrodes and on the collectors. − However, many commonly used binders, such as polytetrafluoroethylene and poly(vinylidene fluoride), have high electrical resistivity. − Therefore, the performance of the electrodes is lowered owing to a reduction in accessible surface area for ion adsorption and reduced electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Stable Lignin-Rich Nanofibers for Binder-Free Carbon Electrodes in Supercapacitors

Khamnantha

Homla-or

Suttisintong

et al. 2021

ACS Appl. Nano Mater.

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In this work, 1,2,4,5-benzenetetracarboxylic acid (BT) is used as a cross-linker to improve the oxidative thermostabilization of lignin-rich nanofibers so that the activated carbon nanofiber (ACNF) sheets can be prepared from lignins. As sources, we used organosolv lignins from sugarcane bagasse (LB), para rubber wood chip (LR), and palm kernel shell (LP). The addition of BT imparts hydrogen bond interactions between BT and lignin and increases the oxidation degree of lignin during the stabilization, enabling retention of nanofiber morphology after heat treatments. The preparation of activated carbon in the form of nanofibers substantially enhances the specific surface area of the materials when compared with the activated carbon powders from pure lignins. The properties of the resulting ACNFs are influenced by the structure and composition of lignins. With the synergistic effects of a small fiber diameter (688 ± 80 nm), a high content of heteroatom (O atomic content ∼5.1%), a high graphitic carbon structure (I D /I G ratio ∼0.98), a high conductivity (N I>0.1nA /A ∼3479 ± 404 pixel μm −2 at 0.5 V), and a high specific surface area (∼2195 m 2 g −1 ), the ACNFs from LB show the highest specific capacitance of 182 F g −1 (at a current density of 0.1 A g −1 in 1.0 M H 2 SO 4 electrolyte) with good cycling stability (95.7% capacitance retention after 6000 cycles). A maximum energy density of 31 W h kg −1 at a power density of 240 W kg −1 can be achieved from the LB/PEO/BT ACNFs. Their performance is almost comparable to that of polyacrylonitrile ACNFs. These findings demonstrate a simple and effective approach to produce lignin-based ACNFs from diverse biomass feedstock for sustainable development of renewable materials for supercapacitor electrodes.

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Preparation, characterization and the supercapacitive behaviors of electrochemically reduced graphene quantum dots/polypyrrole hybrids

Cited by 20 publications

References 50 publications

Polymer Composites with Quantum Dots as Potential Electrode Materials for Supercapacitors Application: A Review

Polymer Composites with Quantum Dots as Potential Electrode Materials for Supercapacitors Application: A Review

Fabrication of semi‐flexible carbon quantum dots‐reinforced polypyrrole ( PPy / CQDs ) composite electrodes by hybrid electrospray deposition for high‐performance energy storage device

Stable Lignin-Rich Nanofibers for Binder-Free Carbon Electrodes in Supercapacitors

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