Nanosized graphitic carbon with balanced micro/mesoporosity for robust supercapacitor with superior volumetric capacitance and cyclic performance

Xue, Chunfeng; Fu, Yang; Wang, Enyang; Feng, Lin; Du, Xiaoqiang; Hao, Xiaogang; Li, Xupeng

doi:10.1016/j.electacta.2018.03.172

Cited by 27 publications

(7 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Electrochemical impedance spectroscopy (EIS) was used to further investigate the electrochemical performance of SCPC electrodes in three aqueous electrolytes. The intercept with the real axis from Nyquist plot (Figure h) at high frequency region is the equivalent series resistance (ESR), which represents the internal resistance of the electrochemical system including the intrinsic resistance of carbon material, the ionic resistance of the electrolyte solution, and the interface resistance between carbon material and current collector . As shown in Figure h, the ESR of SCPC electrodes is 1.15, 2.19, and 0.79 Ω in H 2 SO 4 , Na 2 SO 4 , and KOH, respectively.…”

Section: Resultsmentioning

confidence: 98%

Biomass‐based Hierarchical Porous Carbon for Supercapacitors: Effect of Aqueous and Organic Electrolytes on the Electrochemical Performance

et al. 2019

View full text Add to dashboard Cite

Biomass‐based hierarchical porous carbon (SCPC) exhibits excellent electrochemical performance in electric double layer capacitors, prepared by carbonization and activation of straw cellulose. To investigate the potential applications of SCPC in supercapacitors, the effect of aqueous and organic electrolytes on the electrochemical performance of SCPC was studied in detail. In H2SO4, the SCPC electrode exhibits higher specific capacitance (358 F g−1) and outstanding cycling stability with 95.6 % capacitance retention over 10 000 cycles. The SCPC electrode shows superior rate capability with 90.7 % capacitance retention in KOH, and higher energy density of 17.9 Wh kg−1 in Na2SO4. The SCPC electrode exhibits ideal capacitance characteristics, superior rate capability with capacitance retention of 95.8 %, and high energy density of 36.0 Wh kg−1 in tetraethylammonium tetrafluoroborate/propylene carbonate (Et4NBF4/PC). The significant difference of capacitive performance of SCPC electrode in various electrolytes is mainly attributed to the difference in the electrolyte ion size, ionic conductivity, matching between the electrolyte ions and pore structure, and matching between anions and cations adsorbed on the positive and negative electrodes. This work not only establishes the relationship between the structure of SCPC and its electrochemical performance in different electrolytes, but also provides a reference for the high value‐added utilization of SCPC.

show abstract

Section: Resultsmentioning

confidence: 98%

Biomass‐based Hierarchical Porous Carbon for Supercapacitors: Effect of Aqueous and Organic Electrolytes on the Electrochemical Performance

et al. 2019

View full text Add to dashboard Cite

show abstract

“…On one hand, the high content of defective carbon provided more active sites or active surface areas, giving rise to improved capacitance. On the other hand, graphitized carbon increases the electric conductivity which benefited the rate capability [20]. erefore, the optimized capacitive performance is called for the good intercoordination of both effects.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, manipulation of the graphitization degree would increase the electrical conductivity, which facilitates the charge transfer especially at high rate [19,20]. erefore, development of well-designed ACs with high SSA, welldesigned pore structure, heteroatom doping, and high graphitization degree opens new opportunities for this sort of traditional materials in future SC devices.…”

Section: Introductionmentioning

confidence: 99%

Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor

Han

Geng

Cheng

2018

Journal of Nanotechnology

View full text Add to dashboard Cite

Lamellar activated carbons derived from Konjac sponges (KACs) have been successfully fabricated through a facile KOH activation method. By manipulating the activation temperature and KOH/C ratio, the achieved KACs exhibit ultrahigh specific surface area up to ∼3000 m2/g and hierarchical pore structure with tunable micro/mesopore distribution. Notably, KACs possess plenty of worm-shaped micropores formed by graphene stacking layers with the lateral distance close to size of hydrated electrolyte ions. Owing to optimized pore structure, high graphitization, and extra O/N doping, KACs exhibited much enhanced specific capacitance (253.0 F/g), superior rate ability (77% retention of capacitance at 10 A/g), and remarkable cycling stability (0.4% decay under 5 A/g after 2000 cycles) in the acid electrolyte. The mass production ability of KAC materials and the knowledge of correlation between texture properties and capacitive performance open new opportunities for the application of such novel biomass-derived carbons in supercapacitor devices.

show abstract

“…Chunfeng Xue et al [25] produced graphitic porous carbon by directly carbonizing Ni cation-exchanged resin at a moderate temperature of 800 ∘ C. The similarly dispersed Ni nanoparticle not only well acted as the catalyst for the commercial resin graphitization, but also took part in manufacturing matched micropore and mesopore structure. The graphitic carbon exhibiting stable microporosity and mesoporosity at the ratio of 1:2, supplied a superior specific capacitance 66 µF/cm 2 and high volumetric capacitance of 552.6 F/cm 3 at the current density of 0.5 A/g in the electrolyte of 1 M H 2 SO 4 .…”

Section: Pure Carbon Electrodesmentioning

confidence: 99%

Recent progress in supercapacitors based on the advanced carbon electrodes

Pan

2019

Nanotechnology Reviews

View full text Add to dashboard Cite

This paper demonstrates a brief review of the research progress of the advanced carbon-based materials for the supercapacitor electrodes. Diverse types of carbon-based electrodes exploited and reported to the literature are summarized and classified into pure carbon electrodes, carbon/metal oxides composite electrodes, carbon/metal oxides/conducting polymers composite electrodes as well as carbon electrodes based on other materials. Pure carbon electrodes are firstly introduced, confirming their merits and shortcomings. To cover the shortage of pure carbon electrodes and further enhances their electrochemical performance, a composite electrode, combined with metal oxides and conducting polymers, is respectively presented. It is worth noticing in this article that combining various materials to form composites has been one main direction to own a positive synergistic effect on the carbon-based electrodes.

show abstract

Nanosized graphitic carbon with balanced micro/mesoporosity for robust supercapacitor with superior volumetric capacitance and cyclic performance

Cited by 27 publications

References 71 publications

Biomass‐based Hierarchical Porous Carbon for Supercapacitors: Effect of Aqueous and Organic Electrolytes on the Electrochemical Performance

Biomass‐based Hierarchical Porous Carbon for Supercapacitors: Effect of Aqueous and Organic Electrolytes on the Electrochemical Performance

Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor

Recent progress in supercapacitors based on the advanced carbon electrodes

Contact Info

Product

Resources

About