Ultrathin carbon nanosheets for highly efficient capacitive K-ion and Zn-ion storage

Zhang, Yamin; Wang, Zhongpu; Li, Deping; Sun, Qing; Lai, Kangrong; Li, Kaikai; Yuan, Qunhui; Liu, Xingjun; Ci, Lijie

doi:10.1039/d0ta08577d

Cited by 73 publications

(35 citation statements)

References 52 publications

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“…Ultrathin carbon nanosheets materials (UTCs) were synthesized by using calcium gluconate as a carbon source through a simple in situ template pyrolysis method. [60] The as-synthesized UTCs-900 electrode was found to exhibit a good potassium-ions storage performance including an excellent reversible capacity (413.7 mAh g À 1 ), an outstanding rate capability (161.8 mAh g À 1 at of 5.0 A g À 1 ) and high longterm cycling stability (a high-capacity retention ratio of 75.0 % after 5500 cycles at 5.0 A g À 1 ). Moreover, this UTCs-900 electrode as also shows excellent zinc ion storage characteristics.…”

Section: D Carbon-based Anode Materials For Picsmentioning

confidence: 97%

Application of 2D Materials to Potassium‐Ion Hybrid Capacitors

Zhang

Deng

et al. 2021

ChemSusChem

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Metal‐ion hybrid supercapacitors (MICs) are a new type of electrochemical energy storage (EES) device, consisting of a battery‐type electrode and a supercapacitor (SC)‐type electrode. Exhibiting the advantages of both batteries and SCs (e. g., good energy density, excellent power density and long cycle life), these advanced energy storage devices have considerable commercial application prospects. Among MICs, potassium‐ion hybrid supercapacitors (PICs) have several further advantages, including abundancy of resources, low standard electrode potential, and low cost. PICs are regarded as potential substitutes for lithium‐ or sodium‐ion hybrid supercapacitors. However, the practical applications of PICs remain limited, owing to the imbalance of kinetics and capacity between the electrodes, the slow ion/electron diffusion rate, and the poor electrode structural stability. Recently, 2D materials with distinct structures and fascinating features have elicited widespread attention for application in PICs, thus achieving significant enhancements, ranging from charge storage capacity to reaction kinetics. This Review discusses research progress in 2D materials for PICs. Firstly, the energy storage principle and development requirements of MICs are introduced. The pivotal advantages and significant roles of 2D materials in the fabrication of PICs are then discussed in detail. Lastly, the challenges and prospects of the application of 2D materials to high‐performance PICs are presented.

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Section: D Carbon-based Anode Materials For Picsmentioning

confidence: 97%

Application of 2D Materials to Potassium‐Ion Hybrid Capacitors

Zhang

Deng

et al. 2021

ChemSusChem

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“…Apart from the commercial AC, many PCs electrode materials can be fabricated through various methods, like template method [111][112][113] and pyrolysis method [108,[114][115][116]. As for the pyrolysis methods, the precursor is a significant part of synthesizing high-quality PC electrode materials.…”

Section: Hssa Carbon Electrodementioning

confidence: 99%

A Better Zn-Ion Storage Device: Recent Progress for Zn-Ion Hybrid Supercapacitors

et al. 2022

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As a new generation of Zn-ion storage systems, Zn-ion hybrid supercapacitors (ZHSCs) garner tremendous interests recently from researchers due to the perfect integration of batteries and supercapacitors. ZHSCs have excellent integration of high energy density and power density, which seamlessly bridges the gap between batteries and supercapacitors, becoming one of the most viable future options for large-scale equipment and portable electronic devices. However, the currently reported two configurations of ZHSCs and corresponding energy storage mechanisms still lack systematic analyses. Herein, this review will be prudently organized from the perspectives of design strategies, electrode configurations, energy storage mechanisms, recent advances in electrode materials, electrolyte behaviors and further applications (micro or flexible devices) of ZHSCs. The synthesis processes and electrochemical properties of well-designed Zn anodes, capacitor-type electrodes and novel Zn-ion battery-type cathodes are comprehensively discussed. Finally, a brief summary and outlook for the further development of ZHSCs are presented as well. This review will provide timely access for researchers to the recent works regarding ZHSCs.

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“…The varied Zn and F content at different charge/discharge states indicates the likely formed Zn(CF 3 SO 3 ) 2 [Zn(OH) 2 ] 3 ⋅ x H 2 O during the charge process, partially decomposed during discharge [18] . The electrochemical mechanism of carbon nanosheets cathode was investigated by multiple ex‐situ characterization methods [5d] . At the discharged state, the surface pore density reduction was evidenced by SEM observation, which is ascribed to the Zn‐ion adsorption.…”

Section: Electrochemical Mechanism Understanding In Zihscsmentioning

confidence: 99%

“…Higher C−O−Zn/C−OH bonding ratio at the discharged state was evidenced through ex‐situ XPS of the C1s spectra. Thus, the electrochemical mechanism of carbon nanosheets was related to the reversible Zn‐ion adsorption/desorption at low voltage [5d] . However, at high voltage region (charged state), it is likely that the anions in electrolyte are also adsorbed on the surface of the carbon nanosheets.…”

Section: Electrochemical Mechanism Understanding In Zihscsmentioning

confidence: 99%

Zinc‐Ion Hybrid Supercapacitors: Progress and Future Perspective

Gong

Chen

Lee

2021

Batteries & Supercaps

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The increasing concern on the safety risks associated with the flammable organic electrolytes in alkali‐ion batteries and the pursuit of both high energy density and power density in one device has spurred the investigation of aqueous multivalent metal ion hybrid supercapacitors. Zinc‐ion hybrid supercapacitors (ZIHSCs) have the advantages of low standard potential, high theoretical capacity and good safety in aqueous electrolytes. In this review, the recent advancements achieved in ZIHSCs have been summarized and discussed. The progress in cathode, anode, electrolyte and the approaches adoptable to improve the electrochemical performance of ZIHSCs have been categorized. Mechanism investigation through different ex‐situ and in‐situ methods, incorporation of multi‐functionality and integration are also demonstrated. Adoption of more in‐situ characterization methods to understand the electrochemical mechanism of ZIHSCs is encouraged. Future development of ZIHSCs with higher active materials utilization rate and power output for practical applications is envisioned, assembly of ZIHSCs with more functionality is also expected.

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Ultrathin carbon nanosheets for highly efficient capacitive K-ion and Zn-ion storage

Abstract: Porous carbon has attracted extensive attentions as the electrode material for various energy storage devices considering its advantages like high theoretical capacitance/capacity, high conductivity, low cost and earth abundant inherence....

Cited by 73 publications

References 52 publications

Application of 2D Materials to Potassium‐Ion Hybrid Capacitors

Application of 2D Materials to Potassium‐Ion Hybrid Capacitors

A Better Zn-Ion Storage Device: Recent Progress for Zn-Ion Hybrid Supercapacitors

Zinc‐Ion Hybrid Supercapacitors: Progress and Future Perspective

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