Graphene supported ZnO/CuO flowers composites as anode materials for lithium ion batteries

Chen, Xuefang; Zhang, Shuai; Zhang, Xiang; Li, Chao; Chen, Junjiao; Wang, Ke

doi:10.1016/j.matlet.2015.03.136

Cited by 41 publications

(18 citation statements)

References 17 publications

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“…CuO monoklinik kristal yapıya sahip, zehirli olmayan, ucuz, kolay sentezlenebilen ve doğada bol bulunan bir yarıiletken malzemedir. Bu yüzden CuO ince filmler biyosensörler [5], gaz sensörleri [6], güneş pilleri [7], lityum iyon bataryalar [8], ince film transistörler [9] gibi teknolojinin birçok alanında değişik uygulamalar için yaygın biçimde araştırılmaktadır.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Sılar Yöntemi ile Üretilen CuO Filmlerin Yapısal, Morfolojik ve Optik Özelliklerine İkili Katkılamanın (Zn, Li) Etkisi

Aydın¹,

Şahin²,

Bayansal³

2016

SAUFenBilDer

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ÖZBu çalışmada katkısız CuO ve farklı konsantrasyonlarda Li-katkılı Li-ZnCuO filmler cam altlıklar üzerine SILAR yöntemi ile başarılı bir şekilde büyütüldü. Üretilen bu filmler metalurjik mikroskop (MM), X-ışını kırınımı (XRD) ve UV-Vis. spektroskopi ile karakterize edildi. MM sonuçları, CuO filmlerin morfolojisi üzerine Li-Zn ikili katkılama konsantrasyonunun önemli bir etkiye sahip olduğunu gösterdi. XRD verileri filmlerin nanoboyutta kristalize olduklarını ve kristallenme kalitesinin katkı konsantrasyonuna bağlı olarak değiştiğini açığa çıkardı. Uv-Vis. analiz sonuçları, filmlerin hem optik bant aralığı değerlerinde hem de geçirgenliklerinde katkı konsantrasyonuna bağlı olarak önemli farklılıkların oluştuğunu ortaya koydu.Anahtar Kelimeler: CuO, lityum, çinko, ikili katkılama, SILAR, ince film Effect of co-doping (Zn-Li) on structural, morphological, and optical properties of CuO films produced by SILAR method ABSTRACT In this study, un-doped CuO, and different concentrations of Li-doped Li-ZnCuO films were successfully synthesized on glass substrates by the SILAR method. The synthesized films are characterized by metallurgical microscope (MM), X-ray diffraction (XRD) and UV-Vis. spectroscopy. MM results demonstrated that Li-Zn codoping concentration has a significant influence on morphology of CuO film. XRD data revealed that the films are crystallized in nanoscale and the crystallinity is dependent on the doping concentration. Uv-Vis. analysis demonstrated that there are significant differences in the optical bad gap and transmittance values of the films as a function of doping concentration.

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Section: Gi̇ri̇ş (Introduction)unclassified

Sılar Yöntemi ile Üretilen CuO Filmlerin Yapısal, Morfolojik ve Optik Özelliklerine İkili Katkılamanın (Zn, Li) Etkisi

Aydın¹,

Şahin²,

Bayansal³

2016

SAUFenBilDer

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“…and transition metal oxides (MnO, CuO, ZnO, etc.) were constantly proposed and investigated for high performance LIB [2][3][4][5]. As one of semiconductive transition metal oxides, TiO 2 was also considered as one of the promising alternative anode active materials due to low toxicity, high safety, and small volume change [6].…”

Section: Introductionmentioning

confidence: 99%

Binder-free combination of amorphous TiO2 nanotube arrays with highly conductive Cu bridges for lithium ion battery anode

Meng

Hou

Liu

et al. 2016

Ionics

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Binder-free combination of highly conductive Cu bridges with amorphous TiO 2 nanotube arrays for lithium ion battery anode were designed and achieved via one-step facile electrodeposition. The obtained composite Cu/TiO 2 nanotubes electrode was studied in terms of XRD, SEM, EDX, galvanostatic charge/discharge, cycle stability, rate performance, and AC impedance. As expected, the composite electrode delivered higher discharge capacity, rate performance, and cycle stability than the bare one, possibly due to improved electrical conductivity and the synergy effect between conductive Cu bridges and amorphous TiO 2 nanotube arrays.

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“…For hematite a = 810 4 cm À1 at 550 nm, the photoelectrodes must then be 0.4 mmi no rder to absorb 95 %o f light at this wavelength. [6][7][8][9][10][11] Hybridn anomaterials based on TiO 2, [12] ZnO, [13] SnO 2, [14] Co 3 O 4, [15] MnO 2, [16] CdS, [17] CdSe, [18] BiVO 4 [19] ,F e 2 O 3, [20] and graphene have been investigated in many applications due to the synergistic effect between them.R ecently,o ur group has reported ap erformance improvement of reduced graphene oxide incorporated with semiconductors for photoreduction of CO 2 ,m ethylene blue photodegradation and as electron transport layer in organic solar cells. Due to these limitations, the maximum efficiency achieved in aP EC system using this semiconductor is stillf ar from the theoretical limit.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, graphene is ap romising component to be incorporated in materials used as electrodes to increase their efficiency.R ecently,s everal research groupsh ave been exploring the use of graphenebased nanomaterialst or eplace conventional materials. [6][7][8][9][10][11] Hybridn anomaterials based on TiO 2, [12] ZnO, [13] SnO 2, [14] Co 3 O 4, [15] MnO 2, [16] CdS, [17] CdSe, [18] BiVO 4 [19] ,F e 2 O 3, [20] and graphene have been investigated in many applications due to the synergistic effect between them.R ecently,o ur group has reported ap erformance improvement of reduced graphene oxide incorporated with semiconductors for photoreduction of CO 2 ,m ethylene blue photodegradation and as electron transport layer in organic solar cells. [21][22][23] This work describes the synthesis and characterization of hematite photoanodes using nanoparticles synthesized under hydrothermal conditions and deposited on ac onductive glass substrate by the doctor-blade technique.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hematite Photoanode Activity for Water Oxidation by Incorporation of Reduced Graphene Oxide

2015

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Two effective methods to prepare reduced graphene oxide (rGO)/hematite nanostructured photoanodes and their photoelectrochemical characterization towards water splitting reactions are presented. First, graphene oxide (GO) is reduced to rGO using hydrazine in a basic solution containing tetrabutylammonium hydroxide (TBAOH), and then deposited over the nanostructured hematite photoanodes previously treated at 750 °C for 30 min. The second method follows the deposition of a paste containing a mixture of hematite nanoparticles and rGO sheets by the doctor-blade method, varying the rGO concentration. Since hematite suffers from low electron mobility, a low absorption coefficient, high recombination rates and slow reaction kinetics, the incorporation of rGO in the hematite can overcome such limitations due to graphene's exceptional properties. Using the first method, the rGO incorporation results in a photocurrent density increase from 0.56 to 0.82 mA cm(-2) at 1.23 VRHE. Our results indicate that the rGO incorporation in the hematite photoanodes shows a positive effect in the reduction of the electron-hole recombination rate.

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Graphene supported ZnO/CuO flowers composites as anode materials for lithium ion batteries

Cited by 41 publications

References 17 publications

Sılar Yöntemi ile Üretilen CuO Filmlerin Yapısal, Morfolojik ve Optik Özelliklerine İkili Katkılamanın (Zn, Li) Etkisi

Sılar Yöntemi ile Üretilen CuO Filmlerin Yapısal, Morfolojik ve Optik Özelliklerine İkili Katkılamanın (Zn, Li) Etkisi

Binder-free combination of amorphous TiO2 nanotube arrays with highly conductive Cu bridges for lithium ion battery anode

Enhancing Hematite Photoanode Activity for Water Oxidation by Incorporation of Reduced Graphene Oxide

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