A novel three-dimensional graphene for remarkable performance of electrochemical energy storage

Zhang, Zhigang; Zhao, Jinping; Gao, Lianlian; Zhou, Jin; Miao, Zhichao; Zhao, Yi; Zhuo, Shuping

doi:10.1016/j.electacta.2017.12.038

Cited by 16 publications

(4 citation statements)

References 70 publications

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“…All geometries exhibited an intersection at the real axis at high frequencies, which describes the intrinsic internal resistance in series (R s ) of the electrochemical system; a semicircular at high to intermediate frequencies, assigned to the Faradic charge transfer resistance on the electrolyte/electrode interface (R ct ); a 45° Warburg region in the mid-frequency range, referred to the electrolyte ion diffusion in the bulk of electrode (Z W ); a straight line in the low-frequency region, exhibiting the ideal capacitive behavior (C L ). [52] The GCD curves of the NCM-A600 electrode were also shown in Figure 4c. Moreover, the slope of the straight line for activated samples was much larger than that of the NCM250, suggesting a much lower diffusion resistance.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 94%

Fe₃O₄/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Jia

Shao

et al. 2019

Adv Materials Inter

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template-assisted carbonizations, [5,6] electrochemistry deposition, [7] spontaneous gas-foaming, [8] "gel-blowing," [9] "Pharaoh's snakes" reaction, [10] and nanocasting have been developed, and allowing different types of NCMs synthesis from various organic precursors. [11] Although it is possible to obtain desired NCMs with tailored structures and properties by carefully selecting specific procedures, [12] these processes always suffer from removing a template and multi-step operation. [13] Thus, novel strategies to one-pot synthesizing multilevel heteroatom-doped NCMs are still being urgently desired. [14] Advanced NCMs would be potentially promising for supercapacitors (SCs) applications because of the unique structural advantages, [15] such as a large specific surface area and high electrical conductivity. [16] Especially, with the increasing interests in mobile electronics, portable electronic devices, electronic textiles, and skins, highly flexible, and safe energy storage devices with high energy and power densities maintain a growing demand. [17] NCMbased SCs can bridge the gap between conventional capacitors and cells, have been widely used in various areas due to their rapid energy transfer, long cycle life, sustained stability, and a wide range of working temperatures. [18] Moreover, after combination of transition metal compounds (TMCs) including metal oxides (e.g., MnO 2 , Fe 2 O 3 , CuO), [19] metal sulfides (MoS 2 ), [20] metal nitrides (e.g., TiN, Fe 2 N), [21] metal-organic frameworks, [22] and metal hydroxide (e.g., Ni(OH) 2 ), [23] the key faradic capacitance of NCM electrodes can be prominently enhanced. Among the TMCs, ferroferric oxide (Fe 3 O 4 ) is particularly promising since: [24] 1) a higher conductivity than other TMCs (σ = 2 × 10 4 S m −1 ); 2) a relatively low potential and a high theoretical capacity (≈346.5 mAh g −1 ) on the basis of the possible variation of iron's valence states (Fe 3+ ↔ Fe 0 ) in alkaline aqueous solution, which can deliver large voltage windows (≤−1.3 V vs Ag/AgCl) and high pseudocapacitance attributions; 3) ecofriendliness during the synthesis process, natural abundance, and compatibility. For instance, Fe 3 O 4 -carbon nanosheets, [25] graphene-wrapped Fe 3 O 4 , [26] rGO-encapsulated Fe 3 O 4 nanocube, [27] graphene aerogel-supported Fe 3 O 4 , [28,29] carbon nanotube/cubic Fe 3 O 4 , [30] and Fe 3 O 4 /activated carbon [31] have been designed to achieve high electrochemical performance. [32] Although the Transition metal oxide and heteroatoms doped carbon are promising in high performance energy storage upon complete redox reaction. Herein, nanoparticle-embedded carbon nanosheets are fabricated by a one-pot tailored thermally expansion of viscous precursors. The obtained biomass carbon exhibits ideal surface area, crystal structures, and heteroatom doping. Benefiting from the synergistic effect of the constituent components, this composite electrode reaches a high potential window of 1.1 V and delivers a good specific capacitance of 522.7 F g −1 in aqueou...

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Section: Wwwadvmatinterfacesdementioning

confidence: 94%

Fe₃O₄/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Jia

Shao

et al. 2019

Adv Materials Inter

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“…Now, GO self-assembly is the most widely used method for 3DGM fabrication. photo-irradiation, [17] high temperature [18] or some chemical agents [19] exfoliate the oxygen-containing functionalities while chemical or physical bonds link GO sheets together. In addition to these three main methods, other advanced approaches, such as electrochemical deposition, supercritical fluid technique and 3D printing, are also exploited.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Surface Chemical State of Graphene Oxide Sheets for the Self‐Assembly of Graphene Hydrogel for Capacitive Energy Storage

Huang

Zhong

et al. 2021

ChemElectroChem

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Three-dimensional graphene materials have greatly expanded the market space of graphene, but their economical fabrication remains a challenge. Herein, we report a facile and low-cost method for the preparation of high-performance graphene hydrogels by adding ammonium-modified graphene oxide into low-dielectric constant organic solvents. By forming ammonium salts or through a re-protonation process, the graphene sheets are assembled together by electrostatic attraction or hydrogen bonding interactions, along with π-π interactions. The unique structure-aligned few-layer graphene sheets, abundant surface functional groups and multifarious pores-enables prepared hydrogels with both superior charge storage capability (207.6 F g À 1 at 1 A g À 1 ) and excellent high-rate performance (83.2 % capacitance retention when the discharge current density is increased from 0.5 to 10 A g À 1 ). In this study, we present some achievements in capacitive energy storage but, while they are encouraging, graphene-based materials prepared by this feasible and efficient route can also be applied to other advanced applications likenew-generation rechargeable batteries, sensors, biomedical engineering, and water purification.

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“…Although these merits of the EDLC electrodes make them easier to be commercially used, the relatively mediocre capacitance is an urgent problem to be solved . Therefore, considerable works have been done on controlling the microstructure and component, for example, preparation of electrode materials with three-dimensional (3D) structures, ideal porous structure, and doping heteroatoms, which can affect ion-accessible surface area, ionic transport rate, conductivity, and electrochemical activity, thereby enhancing capacitive performance …”

Section: Introductionmentioning

confidence: 99%

“…10 Although these merits of the EDLC electrodes make them easier to be commercially used, the relatively mediocre capacitance is an urgent problem to be solved. 11 Therefore, considerable works have been done on controlling the microstructure and component, for example, preparation of electrode materials with three-dimensional (3D) structures, 12 ideal porous structure, 13 and doping heteroatoms, 14 which can affect ionaccessible surface area, ionic transport rate, conductivity, and electrochemical activity, thereby enhancing capacitive performance. 15 As a good candidate for an electrode material of EDLCs, graphene is an ideal two-dimensional crystal with high specific surface area, excellent electrical conductivity, and stability, which has been used widely in catalyst, energy conversion, and storage fields.…”

Section: ■ Introductionmentioning

confidence: 99%

Plasma-Assisted Simultaneous Reduction and Nitrogen/Sulfur Codoping of Graphene Oxide for High-Performance Supercapacitors

Miao

Wang

2019

ACS Sustainable Chem. Eng.

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Nitrogen and sulfur-codoped reduced graphene oxide (RGO) was prepared with the assistance of an environmentally benign and facile route using an inductive coupled plasma (ICP) source. This novel gas-phase process avoids high temperature and toxic solvents and can minimize reaggregation of graphene flakes. The plausible mechanism of the plasma treatment to achieve simultaneous doping and reduction of graphene oxide (GO) is discussed. Morphology and component characterization indicate that oxygen-containing functional groups were effectively removed, meanwhile N and S elements were uniformly doped into the graphene nanosheets. Electrochemical performance of the plasma treatment electrode is better than that of the hydrothermally prepared electrode and GO, which has a high specific capacitance of 307.4 F g–1 at 1 A g–1 and retains 83% of the capacitance after 10 000 cycles at 4 A g–1 in 6 M KOH. In addition, the symmetric supercapacitor device was fabricated, and the energy density of the plasma-treated sample is 9.33 Wh kg–1 at the power density of 125 W kg–1 and remains 7.36 Wh kg–1 at 10 KW kg–1 in 6 M KOH. Hence, the plasma-assisted technique is an effective route to introduce the heteroatom, and the as-prepared N/S-codoped graphene-based material exhibits great potential for high-performance supercapacitors.

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A novel three-dimensional graphene for remarkable performance of electrochemical energy storage

Cited by 16 publications

References 70 publications

Fe₃O₄/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Fe₃O₄/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Tuning the Surface Chemical State of Graphene Oxide Sheets for the Self‐Assembly of Graphene Hydrogel for Capacitive Energy Storage

Plasma-Assisted Simultaneous Reduction and Nitrogen/Sulfur Codoping of Graphene Oxide for High-Performance Supercapacitors

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A novel three-dimensional graphene for remarkable performance of electrochemical energy storage

Cited by 16 publications

References 70 publications

Fe3O4/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Fe3O4/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Tuning the Surface Chemical State of Graphene Oxide Sheets for the Self‐Assembly of Graphene Hydrogel for Capacitive Energy Storage

Plasma-Assisted Simultaneous Reduction and Nitrogen/Sulfur Codoping of Graphene Oxide for High-Performance Supercapacitors

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Product

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Fe₃O₄/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors

Fe₃O₄/Nitrogen‐Doped Carbon Electrodes from Tailored Thermal Expansion toward Flexible Solid‐State Asymmetric Supercapacitors