Building one-dimensional oxide nanostructure arrays on conductive metal substrates for lithium-ion battery anodes
作者：
Jiang, Jian;Li, Yuanyuan;Liu, Jinping* ;Huang, Xintang
期刊：
Nanoscale ,2011年3(1):45-58 ISSN：2040-3364
通讯作者：
Liu, Jinping
作者机构：
[Huang, Xintang; Liu, Jinping; Jiang, Jian] Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.;[Li, Yuanyuan] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China.
通讯机构：
[Liu, Jinping] H;Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
Lithium ion battery (LIB) is potentially one of the most attractive energy storage devices. To meet the demands of future high-power and high-energy density requirements in both thin-film microbatteries and conventional batteries, it is challenging to explore novel nanostructured anode materials instead of conventional graphite. Compared to traditional electrodes based on nanostructure powder paste, directly grown ordered nanostructure array electrodes not only simplify the electrode processing, but also offer remarkable advantages such as fast electron transport/collection and ion diffusion, sufficient electrochemical reaction of individual nanostructures, enhanced material-electrolyte contact area and facile accommodation of the strains caused by lithium intercalation and de-intercalation. This article provides a brief overview of the present status in the area of LIB anodes based on one-dimensional nanostructure arrays growing directly on conductive inert metal substrates, with particular attention to metal oxides synthesized by an anodized alumina membrane (AAM)-free solution-based or hydrothermal methods. Both the scientific developments and the techniques and challenges are critically analyzed. ©2010 The Royal Society of Chemistry.
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Nanostructured reduced graphene oxide/Fe2 O3 composite as a high-performance anode material for lithium ion batteries
作者：
Zhu, Xianjun;Zhu, Yanwu;Murali, Shanthi;Stollers, Meryl D.;Ruoff, Rodney S.*
期刊：
ACS Nano ,2011年5(4):3333-3338 ISSN：1936-0851
通讯作者：
Ruoff, Rodney S.
作者机构：
[Zhu, Yanwu; Stollers, Meryl D.; Zhu, Xianjun; Murali, Shanthi; Ruoff, Rodney S.] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.;[Zhu, Yanwu; Stollers, Meryl D.; Zhu, Xianjun; Murali, Shanthi; Ruoff, Rodney S.] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA.;[Zhu, Xianjun] Cent China Normal Univ, Coll Chem, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Ruoff, Rodney S.] U;Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
关键词：
anode;Fe2O3;homogeneous precipitation;lithium ion battery;reduced graphene oxide
摘要：
Reduced graphene oxide/Fe2O3 composite was prepared using a facile two-step synthesis by homogeneous precipitation and subsequent reduction of the G-O with hydrazine under microwave irradiation to yield reduced graphene oxide (RG-O) platelets decorated with Fe2O3 nanoparticles. As an anode material for Li-ion batteries, the RG-O/Fe 2O3 composite exhibited discharge and charge capacities of 1693 and 1227 mAh/g, respectively, normalized to the mass of Fe 2O3 in the composite (and ∼1355 and 982 mAh/g, respectively, based on the total mass of the composite), with good cycling performance and rate capability. Characterization shows that the Fe 2O3 nanoparticles are uniformly distributed on the surface of the RG-O platelets in the composite. The total specific capacity of RG-O/Fe2O3 is higher than the sum of pure RG-O and nanoparticle Fe2O3, indicating a positive synergistic effect of RG-O and Fe2O3 on the improvement of electrochemical performance. The synthesis approach presents a promising route for a large-scale production of RG-O platelet/metal oxide nanoparticle composites as electrode materials for Li-ion batteries. © 2011 American Chemical Society.
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Visible-light-induced oxidation/[3+2] cycloaddition/oxidative aromatization sequence: A photocatalytic strategy to construct pyrrolo[2,1-a]isoquinolines
作者：
Zou, You-Quan;Lu, Liang-Qiu;Fu, Liang;Chang, Ning-Jie;Rong, Jian;...
期刊：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION ,2011年50(31):7171-7175 ISSN：1433-7851
通讯作者：
Xiao, Wen-Jing
作者机构：
[Lu, Liang-Qiu; Chang, Ning-Jie; Rong, Jian; Fu, Liang; Xiao, Wen-Jing; Chen, Jia-Rong; Zou, You-Quan] Cent China Normal Univ, Minist Educ, Coll Chem, Key Lab Pesticide & Chem Biol, Wuhan 430079, Hubei, Peoples R China.;[Xiao, Wen-Jing] Cent China Normal Univ, Minist Educ, Coll Chem, Key Lab Pesticide & Chem Biol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Xiao, Wen-Jing] C;Cent China Normal Univ, Minist Educ, Coll Chem, Key Lab Pesticide & Chem Biol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.
关键词：
alkaloids;oxygen;photochemistry;tandem reactions;visible light
摘要：
A ray of sunshine: The title reaction sequence using ethyl 2-(3,4-dihydroisoquinolin-2(1H)-yl)acetates with a series of electron-deficient alkenes and alkynes provides rapid and efficient access to pyrrolo[2,1-a] isoquinolines (see scheme; bpy=2,2′-bipyridine, EWG=electron-withdrawing group). The reaction offers a strategically new protocol for the direct and efficient construction of the core structure of naturally occurring lamellarin alkaloids. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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ZnO/BiOI Heterostructures: Photoinduced Charge-Transfer Property and Enhanced Visible-Light Photocatalytic Activity
作者：
Jiang, Jing;Zhang, Xi;Sun, Peibei;Zhang, Lizhi*
期刊：
Journal of Physical Chemistry C ,2011年115(42):20555-20564 ISSN：1932-7447
通讯作者：
Zhang, Lizhi
作者机构：
[Jiang, Jing; Zhang, Lizhi; Zhang, Xi; Sun, Peibei] Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Key Lab Pesticide & Chem Biol, Minist Educ, Coll Chem, Wuhan 430079, Peoples R China.
摘要：
In this study, ZnO/BiOI heterostructures were synthesized by a facile chemical bath method at low temperature. Control of the morphology and constituents of the ZnO/BiOI heterostructures was realized by simply tuning the Bi/Zn molar ratios. The resulting ZnO/BiOI heterostructures exhibited high photocatalytic activity in the degradation of methyl orange under visible-light irradiation. The high photocatalytic activity of the ZnO/BiOI heterostructures was first attributed to their high surface area. Surface photovoltage spectroscopy and transient photovoltage measurements revealed that the photoinduced charge-transfer property of p-type BiOI could be improved greatly by coupling with n-type ZnO. The heterojunction at the interface between the BiOI and ZnO could efficiently reduce the recombination of photoinduced electron–hole pairs to increase the lifetime of charge carriers by 15 times and thus enhance the photocatalytic activity of the ZnO/BiOI heterostructures, in addition to the high surface area. This study reveals that the heterostructure construction between two different semiconductors plays a very important role in determining the dynamic properties of their photogenerated charge carriers and their photocatalytic properties.
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Production of pions, kaons and protons in pp collisions√s = 900 gev with Alice at the lhc
作者：
Aamodt, K.* ;Abel, N.;Abeysekara, U.;Abrahantes Quintana, A.;Abramyan, A.;...
期刊：
EUROPEAN PHYSICAL JOURNAL C ,2011年71(6):1-22 ISSN：1434-6044
通讯作者：
Aamodt, K.
作者机构：
[Kolevatov, R.; Skaali, T. B.; Pocheptsov, T.; Nyiri, A.; Bravina, L.; Hille, P. T.; Milosevic, J.; Dordic, O.; Aamodt, K.; Tywoniuk, K.; Eyyubova, G.; Arsene, C.; Kvaerno, H.; Wikne, J.; Lindal, S.; Tveter, T. S.; Lovhoiden, G.; Nilsson, M. S.; Zabrodin, E.] Univ Oslo, Dept Phys, Oslo, Norway.;[Sitta, M.; Senyukov, S.; Dellacasa, G.; Cortese, P.; Gemme, R.; Ramello, L.; Ferretti, R.] Univ Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, Alessandria, India.;[Sitta, M.; Senyukov, S.; Dellacasa, G.; Cortese, P.; Gemme, R.; Ramello, L.; Ferretti, R.] Grp Coll INFN, Alessandria, India.;[Ahmad, N.; Khan, M. M.; Kamal, A.; Azmi, M. D.; Ahmad, A.; Irfan, M.] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India.;[Kuijer, P. G.; Botje, M.; Bilandzic, A.; Snellings, R.; Krzewicki, M.; van der Kolk, N.] Natl Inst Subat Phys, Amsterdam, Netherlands.
通讯机构：
[Aamodt, K.] U;Univ Oslo, Dept Phys, Oslo, Norway.
关键词：
Large Hadron Collider;Transverse Momentum;Time Projection Chamber;Weak Decay;Silicon Strip Detector
摘要：
The production of π+, π-, K+, K-, p, and p at mid-rapidity has been measured in proton-proton collisions at √ s = 900 GeV with the ALICE detector. Particle identification is performed using the specific energy loss in the inner tracking silicon detector and the time projection chamber. In addition, time-of-flight information is used to identify hadrons at higher momenta. Finally, the distinctive kink topology of the weak decay of charged kaons is used for an alternative measurement of the kaon transverse momentum (pt) spectra. Since these various particle identification tools give the best separation capabilities over different momentum ranges, the results are combined to extract spectra from pt = 100 MeV/c to 2.5 GeV/c. The measured spectra are further compared with QCD-inspired models which yield a poor description. The total yields and the mean pt are compared with previous measurements, and the trends as a function of collision energy are discussed. © CERN for the benefit of the ALICE collaboration 2011.
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Epitaxial growth of branched α-Fe2O3/SnO 2 nano-heterostructures with improved lithium-ion battery performance
作者：
Zhou, Weiwei* ;Cheng, Chuanwei;Liu, Jinping;Tay, Yee Yan;Jiang, Jian;...
期刊：
Advanced Functional Materials ,2011年21(13):2439-2445 ISSN：1616-301X
通讯作者：
Zhou, Weiwei
作者机构：
[Jia, Xingtao; Zhou, Weiwei; Fan, Hong Jin; Cheng, Chuanwei; Yu, Ting] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore.;[Hng, Huey Hoon; Tay, Yee Yan] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore.;[Zhang, Jixuan; Gong, Hao] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore.;[Liu, Jinping; Jiang, Jian] Huazhong Normal Univ, Inst Nanosci & Nanotechnol, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhou, Weiwei] N;Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore.
关键词：
α-Fe2O3;branching;lithium-ion batteries;nano-heterostructure;SnO2
摘要：
We report the synthesis of a novel branched nano-heterostructure composed of SnO2 nanowire stem and α-Fe2O3 nanorod branches by combining a vapour transport deposition and a facile hydrothermal method. The epitaxial relationship between the branch and stem is investigated by high resolution transmission electron microscopy (HRTEM). The SnO2 nanowire is determined to grow along the [101] direction, enclosed by four side surfaces. The results indicate that distinct crystallographic planes of SnO2 stem can induce different preferential growth directions of secondary nanorod branches, leading to six-fold symmetry rather than four-fold symmetry. Moreover, as a proof-of-concept demonstration of the function, such α-Fe2O3/SnO2 composite material is used as a lithium-ion batteries (LIBs) anode material. Low initial irreversible loss and high reversible capacity are demonstrated, in comparison to both single components. The synergetic effect exerted by SnO2 and α-Fe 2O3 as well as the unique branched structure are probably responsible for the enhanced performance. A unique six-fold-symmetry branched α-Fe2O3/SnO2 nano-heterostructure composed of SnO2 nanowire stems and α-Fe2O 3 nanorod branches are prepared by combining a vapour transport deposition and a facile hydrothermal method. As a lithium-ion battery material, the composite exhibits low initial irreversible loss and high reversible capacity in comparison to both single components. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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