SnO2–graphene–carbon nanotube mixture for anode material with improved rate capacities

Zhang, Biao; Zheng, Qingbin; Huang, Zhen Dong; Oh, Sei Woon; Kim, Jang Kyo

doi:10.1016/j.carbon.2011.06.059

Cited by 202 publications

(122 citation statements)

References 40 publications

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“…The latter value is 20% higher than the theoretical capacity of graphite. [ 10 ] There are many other important benefi ts that the electrospun CNF fi lms can offer: namely, i) they can be directly used as electrode without adding binders or conductive additives, which in turn facilitates an easy fabrication process and further improves the energy densities of LIBs; [ 11,12 ] ii) they can function as substrates for supporting nanosized active metal oxides, such as SnO x , Li 4 Ti 5 O 12 , and Si; [13][14][15][16] and iii) the conductive networks arising from CNFs provide fast transfer paths for ions and electrons and relieve the volume change of metal oxides occurring during the charge/discharge cycles, giving rise to high capacities and superior cycle stability. [ 17 ] An important advantage of using PAN as precursor, in particular, is the capability to in situ dope nitrogen onto the fi bers due to the high nitrogen content in PAN according to its chemical formula, (C 3 H 3 N) n .…”

Section: Introductionmentioning

confidence: 99%

Correlation Between Atomic Structure and Electrochemical Performance of Anodes Made from Electrospun Carbon Nanofiber Films

Zhang

et al. 2013

Advanced Energy Materials

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A systematic study is made of the effect of the nitrogen species on the performance of Li‐ion storage and the capacities of carbon‐based anodes in Li‐ion batteries (LIBs). Electrospun carbon nanofiber (CNF) films are fabricated for use as binder‐free electrodes using a polyacrylonitrile precursor. When the CNF films are subjected to carbonization, transformation occurs from an amorphous to a graphitic structure with associated reduction of nitrogen‐containing functional groups. The structural change strongly affects where the Li ions are stored in the CNF electrodes. It is revealed that Li ions can be stored not only between the graphene layers, but also at the defect sites created by nitrogen functionalization. The latter is mainly responsible for the widely reported improved electrochemical performance of LIBs due to N‐doping of carbon materials. An optimized carbonization temperature of 550 °C is identified, which gives rise to a sufficiently high nitrogen content and thus a high capacity of the electrode.

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Section: Introductionmentioning

confidence: 99%

Correlation Between Atomic Structure and Electrochemical Performance of Anodes Made from Electrospun Carbon Nanofiber Films

Zhang

et al. 2013

Advanced Energy Materials

Self Cite

142

147

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“…Graphene is preferably used for the encapsulation of electrochemically active materials for energy storage and conversion because of its extraordinary conductivity, large surface area, excellent exibility and high chemical stability. 30,107 Graphene can be functionalized by various simple methods to produce localized highly reactive regions which result in impressive properties for respective applications. 1,87,90 Silicon is considered as a most promising anode material for next generation LIBs, but its structural and interfacial stability issues still remain a big challenge.…”

Section: 26102mentioning

confidence: 99%

Graphene-based nanocomposites for energy storage and conversion in lithium batteries, supercapacitors and fuel cells

et al. 2014

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Due to their unique properties, together with their ease of synthesis and functionalization, graphene-based materials have been showing great potential in energy storage and conversion. These hybrid structures display excellent material characteristics, including high carrier mobility, faster recombination rate and long-time stability. In this review, after a short introduction to graphene and its derivatives, we summarize the recent advances in the synthesis and applications of graphene and its derivatives in the fields of energy storage (lithium ion, lithium-air, lithium-sulphur batteries and supercapacitors) and conversion (oxygen reduction reaction for fuel cells). This article further highlights the working principles and problems hindering the practical applications of graphene-based materials in lithium batteries, supercapacitors and fuel cells. Future research trends towards new methodologies to the design and the synthesis of graphene-based nanocomposite with unique architectures for electrochemical energy storage and conversion are also proposed. The Royal Society of Chemistry.

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“…[13][14][15][16] In addition, graphene in the composite materials could effectively inhibit aggregation of particles and the large volume swings during the charge/discharge process, which will result in stable cycling performance. 17,18 It was reported that heteroatoms doped into the graphene lattice could modify the physical and chemical properties of the host materials. [19][20][21] Nitrogen doping could modified the electronic properties through the introduction of pyridinic nitrogen and pyrrolic nitrogen, owing to the hybridization between the lone pair electrons of nitrogen and the π system of graphene, as well as the stronger electronegativity of nitrogen compared to carbon.…”

Section: Introductionmentioning

confidence: 99%

Enhanced rate performance of cobalt oxide/nitrogen doped graphene composite for lithium ion batteries

Shi

Chen

et al. 2013

RSC Adv.

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Guo, Z. (2013). Enhanced rate performance of cobalt oxide/nitrogen doped graphene composite for lithium ion batteries. Rsc Advances, 3 (15), 5003-5008. Enhanced rate performance of cobalt oxide/nitrogen doped graphene composite for lithium ion batteries AbstractUltrafine Co3O4 nanocrystals homogeneously attached to nitrogen doped reduced graphene oxide (rGO) by the hydrothermal reaction method are demonstrated as anode materials for lithium ion batteries. Transmission electron microscope images revealed that the crystal size of Co3O4 in Co3O4/N-rGO and Co3O4/rGO is 5-10 nm, much smaller than that of bare Co3O4, indicating that the reduced graphene oxide sheets with Co3O4 nanocrystals attached could hinder the growth and aggregation of Co3O4 crystals during synthesis. The graphene sheets can also effectively buffer the volume change of Co3O4 upon lithium insertion/extraction, thus improving the cycling performance of the composite electrodes. The doped nitrogen on the reduced graphene oxide can not only improve the conductivity of the graphene sheets, but also introduce defects to store lithium and enhance the connection of the Co3O4 nanocrystals to the graphene sheet, leading to better distribution of Co3O4 on the graphene sheets, and enhanced rate performance. The nitrogen doping combined with the unique structural features is a promising strategy for the development of electrode materials for lithium ion batteries with high electrochemical performance.

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SnO2–graphene–carbon nanotube mixture for anode material with improved rate capacities

Cited by 202 publications

References 40 publications

Correlation Between Atomic Structure and Electrochemical Performance of Anodes Made from Electrospun Carbon Nanofiber Films

Correlation Between Atomic Structure and Electrochemical Performance of Anodes Made from Electrospun Carbon Nanofiber Films

Graphene-based nanocomposites for energy storage and conversion in lithium batteries, supercapacitors and fuel cells

Enhanced rate performance of cobalt oxide/nitrogen doped graphene composite for lithium ion batteries

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