Based on the stable tunnel structure of C@K2Ti6O13 hybrid compositions for supercapacitor

Zhang, Chengshuang; Wang, Chuanshen; Zhang, Dazhi; Dai, Shuge; Xu, Wei; Chen, Jie; Bai, Nana; Yang, Yalian

doi:10.1016/j.electacta.2017.08.180

Cited by 8 publications

(7 citation statements)

References 43 publications

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“…The highest energy density of our work was 34.4 Wh kg −1 at a power density of 450 W kg −1 and the highest power density of 9000 W kg −1 at an energy density of 27.9 Wh kg −1 . Such high output energy and power densities were highly competitive compared to those of the recently reported alkali metal titanate-based supercapacitor devices [7,14,15,[29][30][31]].…”

Section: Resultsmentioning

confidence: 95%

“…In previous studies, Zhang et al prepared K 2 Ti 6 O 13 nanobeams (K-TNBs)/carbon nanoparticles composites through hydrothermal method for supercapacitor applications. The results showed that the specific capacitance (175 F g −1 ) of the K-TNBs/carbon composites was improved due to the synergy effect between K-TNBs and carbon [14]. Even though enhanced capacitance of KTO NP electrodes through carbon modification, the proposed procedures for improving conductivity are too complicated.…”

Section: Introductionmentioning

confidence: 99%

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K2Ti6O13 Nanoparticle-Loaded Porous rGO Crumples for Supercapacitors

et al. 2019

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HIGHLIGHTS• K 2 Ti 6 O 13 nanoparticle (KTO NP)-loaded porous reduced graphene oxide crumples (PGCs) were fabricated.• The specific capacitance was improved due to the synergy effect between KTO and PGC.• The KTO NP/PGC composites can be promising electrode materials for supercapacitors.ABSTRACT One-dimensional alkali metal titanates containing potassium, sodium, and lithium are of great concern owing to their high ion mobility and high specific surface area. When those titanates are combined with conductive materials such as graphene, carbon nanotube, and carbon nanofiber, they are able to be employed as efficient electrode materials for supercapacitors. Potassium hexa-titanate (K 2 Ti 6 O 13 , KTO), in particular, has shown superior electrochemical properties compared to other alkali metal titanates because of their large lattice parameters induced by the large radius of potassium ions. Here, we present porous rGO crumples (PGC) decorated with KTO nanoparticles (NPs) for application to supercapacitors. The KTO NP/PGC composites were synthesized by aerosol spray pyrolysis and post-heat treatment. KTO NPs less than 10 nm in diameter were loaded onto PGCs ranging from 3 to 5 µm. Enhanced porous structure of the composites was obtained by the activation of rGO by adding an excessive amount of KOH to the composites. The KTO NP/PGC composite electrodes fabricated at the GO/KOH/TiO 2 ratio of 1:3:0.25 showed the highest performance (275 F g −1 ) in capacitance with different KOH concentrations and cycling stability (83%) after 2000 cycles at a current density of 1 A g −1 .

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

K2Ti6O13 Nanoparticle-Loaded Porous rGO Crumples for Supercapacitors

et al. 2019

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“…On the basis of the stable whisker structure, nanoribbon morphology, and enlarged layer architecture, the MTO materials, specially NTO and KTO, could act as desirable electrodes for supercapacitors. 18,24 Therefore, detailed investigations of the electrochemical performance were explored (Fig. 4).…”

Section: Resultsmentioning

confidence: 99%

“…Such excellent electrochemical performance of NTO and KTO were attributed to the presence of abundant channels for ions insertion and the nanoribbon morphology for facilitating fast electron transmission with highly conductive electrolytes. 24,49…”

Section: Resultsmentioning

confidence: 99%

“…17,18 Many studies have confirmed that titanium oxides with a layer structure and connected framework can be beneficial for the fast insertion of aqueous ions with favorable transport and characteristic pseudocapacitance. 19,20 Such materials have also exhibited the structural stability of compounds by the existence of alkali ions in the crystal system, with Na 2 Ti 3 O 7 , 20 Na 2 Ti 6 O 13 , 21,22 and K 2 Ti 6 O 13 23,24 regarded as potential anode materials with excellent rate capability for battery applications. 19 Chen and colleagues synthesized layered Na 2 Ti 3 O 7 nanoribbons as a high-performance anode for rechargeable Mg–ion batteries with good rate capability.…”

Section: Introductionmentioning

confidence: 99%

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