Carbon-modified Na2Ti3O7·2H2O nanobelts as redox active materials for high-performance supercapacitor

Wang, Chuanshen; Xi, Yunfei; Wang, Mingjun; Zhang, Chengshuang; Wang, Xue; Qi, Yang; Li, Wenlong; Hu, Chenguo; Zhang, Dazhi

doi:10.1016/j.nanoen.2016.08.021

Cited by 51 publications

(27 citation statements)

References 42 publications

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“…In summary, Li 4 Mn 5 O 12 with the waxberry-like and raspberry-like nanosphere structures were successful synthesized under the temperature at 600 • C by wet chemistry and the template method. Compared with raspberry-like nanosphere structure and previous work, Li 4 Mn 5 O 12 with the waxberry-like nanosphere shows better electrochemical performance (the specific capacitance of 535 mF cm −2 and the energy destiny of 110.7 Wh kg −1 ) and good stability at room temperature. Moreover, the performance parameter of the waxberry-like nanosphere Li 4 Mn 5 O 12 has been improved as reported earlier [16,24].…”

Section: Discussionmentioning

confidence: 71%

“…This might be because electric polarization becomes serious with the increase of scan rate [2,30]. The integral capacitance is 147.25 F g −1 at the scan rate of 2 mV s −1 , and remains at 31 F g −1 at 20 mV s −1 , according to Equation (4). Figure 4c shows the charging and discharging curves at different voltages.…”

Section: Electrochemical Testmentioning

confidence: 98%

“…Firstly, the prepared Li 4 Mn 5 O 12 powder (both nanosphere and raspberry-like nanosphere Li 4 Mn 5 O 12 ) was mixed with carbon black and polytetra-fluorene-ethylene (PTFE) binder with a mass ratio at 80:15:5 in 5 mL of ethanol. The mixed slurry was directly painted onto a carbon cloth (6 cm × 2 cm) and dried in the vacuum at 60 • C for 24 h to remove the ethanol on the electrode [4,19,20]. Secondly, the carbon cloth was then cut into three parts (2 cm × 2 cm each) after drying.…”

Section: Assembly Of the Working Electrodementioning

confidence: 99%

“…Although lithium batteries have a wide range of applications in society, due to some unsatisfactory aspects on lithium battery, such as the lower rate capability, reliability, cycling life, and power density [2], seeking high performance storage devices and their electrode materials have become a main problem in some areas of development for science and technology. In recent years, supercapacitors have gained much more attention, due to their superior cycling life, high power density, safety, low cost, stability, and so on [3][4][5]. One of main storage performance factors for supercapacitors is the electrode materials.…”

Section: Introductionmentioning

confidence: 99%

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Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Zhang

Wang

et al. 2018

JLPEA

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Porous materials have superior electrochemical performance owing to its their structure, which could increase the specific and contact area with the electrode. The spinel Li 4 Mn 5 O 12 has a three-dimensional tunnel structure for a better diffusion path, which has the advantage of lithium ion insertion and extraction in the framework. However, multi-space spherical materials with single morphologies are rarely studied. In this work, waxberry-like and raspberry-like nanospheres for Li 4 Mn 5 O 12 have been fabricated by the wet chemistry and solid-state methods for the first time. The diameter of a single waxberry-and raspberry-like nanosphere is about 1 µm and 600 nm, respectively. The specific capacitance of Li 4 Mn 5 O 12 was 535 mF cm −2 and 147.25 F g −1 at the scan rate of 2 mV s −1 , and the energy density was 110.7 Wh kg −1 , remaining at 70% after 5000th charge-discharge cycles. Compared with raspberry-like nanosphere Li 4 Mn 5 O 12 , the waxberry-like nanoporous spinel Li 4 Mn 5 O 12 shows the better electrochemical performance and stability; furthermore, these electrochemical performances have been improved greatly compared to the previous studies. All these results indicate that the waxberry-like nanoporous spinel Li 4 Mn 5 O 12 could provide a potential application in high performance supercapacitors.

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Section: Discussionmentioning

confidence: 71%

Section: Electrochemical Testmentioning

confidence: 98%

Section: Assembly Of the Working Electrodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Zhang

Wang

et al. 2018

JLPEA

Self Cite

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“…To solve this problem, it is necessary to develop exceptional electrode materials having a large specific surface area, superior electrical conductivity, economical manufacture, and special electrochemical performance. In recent years, much attention has been devoted to one-dimensional tunnel structured alkali metal titanates containing potassium, sodium, and lithium owing to their high ease and speed of their ion mobility, and their high specific surface area [7,8]. Alkali metal titanates have a monoclinic structure with a chemical formula A 2 Ti n O 2n+1 (A = Li, K, Na) that is characterized by unique layered (3 < n < 5) and tunnel (6 ≤ n ≤ 8) crystal structures as well as large specific surface areas [7,9,10].…”

Section: Introductionmentioning

confidence: 99%

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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Lithium‐Ion and Sodium‐Ion Hybrid Capacitors: From Insertion‐Type Materials Design to Devices Construction

Dong

et al. 2021

Adv Funct Materials

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There is a great appeal to develop an omnipotent player combining lithium-ion batteries (LIBs) with the capacitive storage communities. Hybrid capacitors as a kind of promising energy storage device are attracting increasing attention in the main playground in recent years. Unlike supercapacitors (SCs) and LIBs, hybrid capacitors combine a capacitive electrode with a Faradaic battery electrode. In these hybrid cells, the capacitive electrode brings the power while the energy mainly comes from the Faradaic one. Numerous efforts have been conducted in the past decades; however, the research about hybrid capacitors is still at its infancy stage, and it is not expected to replace LIBs or SCs in the near future utterly. Here, the advances of hybrid capacitors, including insertiontype materials, lithium-ion capacitors, and sodium-ion capacitors, are reviewed. This review aims to offer useful guidance for the design of faradic battery electrodes and hybrid cell construction. Brief challenges and opportunities for future research on hybrid capacitors are finally presented.

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Carbon-modified Na2Ti3O7·2H2O nanobelts as redox active materials for high-performance supercapacitor

Cited by 51 publications

References 42 publications

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

Waxberry-Like Nanosphere Li4Mn5O12 as High Performance Electrode Materials for Supercapacitors

K2Ti6O13 Nanoparticle-Loaded Porous rGO Crumples for Supercapacitors

Lithium‐Ion and Sodium‐Ion Hybrid Capacitors: From Insertion‐Type Materials Design to Devices Construction

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