Boosting capacitive energy density of conjugated molecule modified porous graphene film as high-performance electrode materials

Hu, Lei; Yang, Kai; Xia, Jianxing; Gou, Chao; Jia, Chunyang

doi:10.1016/j.electacta.2022.140404

Cited by 13 publications

(5 citation statements)

References 59 publications

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“…After reduction, the (001) peak disappeared and a (002) peak at a higher 2θ angle (∼24°) appeared for EG/RGO and 100%-EG films, demonstrating the removal of OFG. 47,48 Additionally, compared with RGO, the diffraction peaks of the EG/RGO shows deviation and broadening, which is attributed to disruption of the regular structure of RGO and the interlayers of graphene sheets due to the addition of EG sheets. 49 The Raman spectra of GO, RGO, 75%-EG/RGO, and 100%-EG are shown in Figure 3b.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

Jiang

Zhang

Sheng

et al. 2023

ACS Appl. Mater. Interfaces

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The agglomeration of graphene sheets and undesired pore size distribution usually lead to unsatisfactory electrochemical properties of reduced graphene oxide (RGO) film electrodes. Herein, crumpled exfoliated graphene (EG) sheets are adopted as the microstructure-regulating agent to tune the morphology and micro-/mesopore amounts with the aim of increasing active surface sites and ion transportation paths in electrodes. With the optimum ratio between EG and GO, the resulting 75%-EG/RGO shows significantly improved specific gravimetric capacitance (C s ) and rate capability when compared with pure RGO electrodes in a symmetrical supercapacitor system. Moreover, when coupling the 75%-EG/RGO cathode with a Zn anode to form a Zn ion hybrid supercapacitor (ZHS), the 75%-EG/RGO exhibits a much higher C s of 327.39 F g −1 at 0.1 A g −1 and can maintain 91.7% capacitance after 8000 cycles. Systematic ex situ X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) measurements reveal that the charge storage mechanism is based on both reversible physical adsorption and dual ion uptake. Furthermore, the quasi-solid-state flexible ZHS also presents high capacitive performance and can maintain ∼100% capacitance under various bending states, demonstrating potential application in wearable electronics. This strategy opens up a new path for constructing high-performance graphene film electrodes.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

Jiang

Zhang

Sheng

et al. 2023

ACS Appl. Mater. Interfaces

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“…Preparation of Graphene Oxide (GO): GO was synthesized from graphite powder by the modified Hummers method. 32 The concentration of GO suspensions is ∼10.0 mg mL −1 .…”

Section: Materials Synthesis Preparation Of Sei-znmentioning

confidence: 99%

A Synergistic Strategy of Organic Molecules Introduced a High Zn²⁺Flux Solid Electrolyte Interphase for Stable Aqueous Zinc-Ion Batteries

Wang

Zhang

Yuan

et al. 2022

ACS Appl. Mater. Interfaces

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Aqueous rechargeable zinc-ion batteries (ARZIBs) are considered as attractive candidates for the next generation of high-safety and low-cost energy storage in large-scale power grids. However, challenges such as the dendrites and the corrosion on the zinc (Zn) surface result in short battery life and low reversibility of Zn plating/stripping. In this work, a method of preconditioning of a zinc anode in hybrid electrolytes (based on poly(ethylene glycol)-200 and H2O) to form a solid electrolyte interphase (SEI) that prevents anode corrosion and dendrites is proposed. Though surface composition analysis and density functional theory calculation, this SEI has dense organic and inorganic components due to the induction of organic molecules and anions and has rapid kinetic and high-throughput properties for the transport of zinc ions. As a result, the SEI-modified Zn anode can maintain a low-voltage hysteresis stable cycle for more than 1600 h in aqueous electrolyte. The anode also exhibits impressive reversibility with a high Coulomobic efficiency of 99.23% over 1300 cycles. Furthermore, the ARZIB encapsulated by this anode and Mn-doped V6O13 cathode enables an outstanding electrochemical stability (181.8 mAh g–1 after 800 cycles at room temperature, 102.2 mAh g–1 after 1000 cycles at −15 °C). This work provides an intriguing idea for the stability maintenance of the anode for ARZIBs or other metal-ion batteries.

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“…The expansion structure is mainly due to the microscopic forces between the graphene sheets. 20,27 To further explore the morphology of the samples, TEM images of the samples are provided. As shown in Fig.…”

Section: Morphological and Physical Characterizationmentioning

confidence: 99%

Redox-active sodium 3,4-dihydroxy anthraquinone-2-sulfonate anchored on reduced graphene oxide for high-performance Zn-ion hybrid capacitors

Yang

Wang

et al. 2022

J. Mater. Chem. A

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Boosting capacitive energy density of conjugated molecule modified porous graphene film as high-performance electrode materials

Cited by 13 publications

References 59 publications

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

A Synergistic Strategy of Organic Molecules Introduced a High Zn²⁺Flux Solid Electrolyte Interphase for Stable Aqueous Zinc-Ion Batteries

Redox-active sodium 3,4-dihydroxy anthraquinone-2-sulfonate anchored on reduced graphene oxide for high-performance Zn-ion hybrid capacitors

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Boosting capacitive energy density of conjugated molecule modified porous graphene film as high-performance electrode materials

Cited by 13 publications

References 59 publications

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

Graphene Film with a Controllable Microstructure for Efficient Electrochemical Energy Storage

A Synergistic Strategy of Organic Molecules Introduced a High Zn2+Flux Solid Electrolyte Interphase for Stable Aqueous Zinc-Ion Batteries

Redox-active sodium 3,4-dihydroxy anthraquinone-2-sulfonate anchored on reduced graphene oxide for high-performance Zn-ion hybrid capacitors

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A Synergistic Strategy of Organic Molecules Introduced a High Zn²⁺Flux Solid Electrolyte Interphase for Stable Aqueous Zinc-Ion Batteries