A nitrogen-doped ordered mesoporous carbon nanofiber array for supercapacitors

Zhou, Dandan; Li, Wang-Yu; Dong, Xiaoli; Wang, Yonggang; Wang, Congxiao; Xia, Yongyao

doi:10.1039/c3ta11667k

Cited by 134 publications

(65 citation statements)

References 34 publications

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“…In this context, it is highly desirable to fabricate anode materials with a breakthrough of the theoretical specific capacity [21,22]. Over the years, development and research efforts have been dedicated to address these problems by designing novel materials such as graphene, carbon nanotubes (CNTs) and carbon nanofibers (CNFs) with hollow and defect structures [23][24][25][26][27][28], graphite microspheres, and mesoporous carbon with non-metal element doping (B, N, P, S) [29][30][31]. Although various nanostructured carbonaceous materials with high specific capacity have been successfully prepared, the durability and rate performance of the electrodes is still an issue.…”

Section: Introductionmentioning

confidence: 99%

From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries

Zhao

Wang

et al. 2015

Nano Res.

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Graphene nanosheets possess a promising potential as electrodes in Li-ion batteries (LIBs); consequently, the development of low-cost and high-productivity synthetic approaches is crucial. Herein, porous graphene-like nanosheets (PGSs) have been synthesized from expandable graphite (EG) by initially intercalating phosphoric acid, and then performing annealing to enlarge the interlayer distance of EG, thus facilitating the successive intercalation of zinc chloride. Subsequently, the following pyrolysis of zinc chloride in the EG interlayer promoted the formation of the porous PGS structure; meanwhile, the gas produced during the formation of the porous structure could exfoliate the EG to graphene-like nanosheets. The synthetic PGS material used as LIB anode exhibited superior Li + storage performance, showing a remarkable discharge capacity of 830.4 mAh·g −1 at 100 mA·g −1 , excellent rate capacity of 211.6 mAh·g −1 at 20,000 mA·g −1 , and excellent cycle performance (near 100% capacity retention after 10,000 cycles). The excellent rate performance is attributed to the Li + ion rapid transport in porous structures and the high electrical conductivity of graphene-like nanosheets. It is expected that PGS may be widely used as anode material for high-rate LIBs via this facile and low-cost route by employing EG as the raw material.

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Section: Introductionmentioning

confidence: 99%

From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries

Zhao

Wang

et al. 2015

Nano Res.

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“…Ordered mesoporousc arbon (OMC) has been extensively reported to be used in variousa pplications for energy storage and conversion systems, including supercapacitors, [21][22][23] fuel cells, [24][25][26] catalysts, [27][28][29] solar cells, [30][31][32] and LIBs. [33][34][35] OMCm aterials have distinct advantages with respect to an uniform and interconnected pore structure, tailorable pore sizes, al arge surface area, ah igh pore volume, an outstanding thermal stability and conductivity,a nd af lexible framework structure.…”

Section: Introductionmentioning

confidence: 99%

High‐Loading Nano‐SnO₂ Encapsulated in situ in Three‐Dimensional Rigid Porous Carbon for Superior Lithium‐Ion Batteries

Xue

Zhao

Tang

et al. 2016

Chemistry A European J

109

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Tin oxide nanoparticles (SnO2 NPs) have been encapsulated in situ in a three-dimensional ordered space structure. Within this composite, ordered mesoporous carbon (OMC) acts as a carbon framework showing a desirable ordered mesoporous structure with an average pore size (≈6 nm) and a high surface area (470.3 m(2) g(-1)), and the SnO2 NPs (≈10 nm) are highly loaded (up to 80 wt %) and homogeneously distributed within the OMC matrix. As an anode material for lithium-ion batteries, a SnO2 @OMC composite material can deliver an initial charge capacity of 943 mAh g(-1) and retain 68.9 % of the initial capacity after 50 cycles at a current density of 50 mA g(-1), even exhibit a capacity of 503 mA h g(-1) after 100 cycles at 160 mA g(-1). In situ encapsulation of the SnO2 NPs within an OMC framework contributes to a higher capacity and a better cycling stability and rate capability in comparison with bare OMC and OMC ex situ loaded with SnO2 particles (SnO2/OMC). The significantly improved electrochemical performance of the SnO2@OMC composite can be attributed to the multifunctional OMC matrix, which can facilitate electrolyte infiltration, accelerate charge transfer, and lithium-ion diffusion, and act as a favorable buffer to release reaction strains for lithiation/delithiation of the SnO2 NPs.

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“…Typical values range from 5.8 % after 8000 cycles [72] to 3.5 % [73] with carbons and less than 1 % [74] or even no fading after 10,000 cycles with nitrogen-doped mesoporous carbons [75]. The beneficial effect of nitrogen doping has been stressed with reasons tentatively associated with electronic effects [47].…”

Section: The Ionically Conducting Phase In Betweenmentioning

confidence: 99%

Supercapacitors: from the Leyden jar to electric busses

Dubal

Holze

2016

ChemTexts

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Supercapacitors are introduced and reviewed as devices with very high electric power capability suggested to support and supplement other devices for electrochemical energy storage and conversion with higher energy content but lower power. They are currently of significant importance on the device and local (end-user) level already providing resources to meet power surge demands. In larger mobile systems (vehicles) they help meeting this demand and also offer high power storage capabilities when braking. On an even higher level, they can provide support for maintaining power quality and help in peak shaving. A brief historic background and general information is followed by an overview of materials and their combination into already marketed devices and in possible systems under development.

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A nitrogen-doped ordered mesoporous carbon nanofiber array for supercapacitors

Cited by 134 publications

References 34 publications

From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries

From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries

High‐Loading Nano‐SnO₂ Encapsulated in situ in Three‐Dimensional Rigid Porous Carbon for Superior Lithium‐Ion Batteries

Supercapacitors: from the Leyden jar to electric busses

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A nitrogen-doped ordered mesoporous carbon nanofiber array for supercapacitors

Cited by 134 publications

References 34 publications

From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries

From graphite to porous graphene-like nanosheets for high rate lithium-ion batteries

High‐Loading Nano‐SnO2 Encapsulated in situ in Three‐Dimensional Rigid Porous Carbon for Superior Lithium‐Ion Batteries

Supercapacitors: from the Leyden jar to electric busses

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High‐Loading Nano‐SnO₂ Encapsulated in situ in Three‐Dimensional Rigid Porous Carbon for Superior Lithium‐Ion Batteries