Improved electrochromic performance and lithium diffusion coefficient in three-dimensionally ordered macroporous V2O5 films

Zhongqiu Tong, Jian Hao, Kun Zhang, Jiupeng Zhao, Bao Lian Su, Yao Li

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

Three-dimensionally ordered macroporous (3DOM) vanadium pentoxide (V 2O5) films with various pore diameters were prepared by anodic deposition into colloidal crystal templates. The influence of the 3DOM structure on lithium ion (Li+) diffusion coefficient was investigated for the first time. X-ray diffraction analysis and HRTEM measurements show that the skeleton walls are composed of crystallites and amorphous V 2O5. The study of electrochromic properties indicates that the pore size has a significant impact on the electrochromic performance. Small pores in the film lead to higher optical contrast and faster switching response. A high transmittance modulation in the visible and near-infrared spectral regions (50% at λ = 650 nm and 47% at λ = 900 nm) with fast response time (1.7 s for coloration and 3.2 s for bleaching) is observed in the 3DOM V2O5 film with a pore size of 210 nm. Because of the fully interconnected macroporous network in the 3DOM structure, the transport and reaction of lithium ions and electrons both behave in an effective 3D model throughout the whole nanostructure. Additionally, due to their influence on the polarization of the electrode and surface defects, sharp nanoscale edges around pores and rough surfaces can further promote Li + diffusion and intercalation/de-intercalation. The 3DOM V 2O5 film with a pore size of 210 nm exhibits a very high Li+ diffusion coefficient of 3.78 × 10-9 cm 2 s-1, which is higher than any coefficient ever reported for a V2O5 film. This journal is

langue originaleAnglais
Pages (de - à)3651-3658
Nombre de pages8
journalJournal of Materials Chemistry C
Volume2
Numéro de publication18
Les DOIs
étatPublié - 14 mai 2014

Empreinte digitale

Lithium
Pore size
Intercalation
Ions
Surface defects
Bleaching
Crystallites
Vanadium
X ray diffraction analysis
Nanostructures
Modulation
vanadium pentoxide
Polarization
Infrared radiation
Crystals
Electrodes
Electrons

Citer ceci

Tong, Zhongqiu ; Hao, Jian ; Zhang, Kun ; Zhao, Jiupeng ; Su, Bao Lian ; Li, Yao. / Improved electrochromic performance and lithium diffusion coefficient in three-dimensionally ordered macroporous V2O5 films. Dans: Journal of Materials Chemistry C. 2014 ; Vol 2, Numéro 18. p. 3651-3658.
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abstract = "Three-dimensionally ordered macroporous (3DOM) vanadium pentoxide (V 2O5) films with various pore diameters were prepared by anodic deposition into colloidal crystal templates. The influence of the 3DOM structure on lithium ion (Li+) diffusion coefficient was investigated for the first time. X-ray diffraction analysis and HRTEM measurements show that the skeleton walls are composed of crystallites and amorphous V 2O5. The study of electrochromic properties indicates that the pore size has a significant impact on the electrochromic performance. Small pores in the film lead to higher optical contrast and faster switching response. A high transmittance modulation in the visible and near-infrared spectral regions (50{\%} at λ = 650 nm and 47{\%} at λ = 900 nm) with fast response time (1.7 s for coloration and 3.2 s for bleaching) is observed in the 3DOM V2O5 film with a pore size of 210 nm. Because of the fully interconnected macroporous network in the 3DOM structure, the transport and reaction of lithium ions and electrons both behave in an effective 3D model throughout the whole nanostructure. Additionally, due to their influence on the polarization of the electrode and surface defects, sharp nanoscale edges around pores and rough surfaces can further promote Li + diffusion and intercalation/de-intercalation. The 3DOM V 2O5 film with a pore size of 210 nm exhibits a very high Li+ diffusion coefficient of 3.78 × 10-9 cm 2 s-1, which is higher than any coefficient ever reported for a V2O5 film. This journal is",
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Improved electrochromic performance and lithium diffusion coefficient in three-dimensionally ordered macroporous V2O5 films. / Tong, Zhongqiu; Hao, Jian; Zhang, Kun; Zhao, Jiupeng; Su, Bao Lian; Li, Yao.

Dans: Journal of Materials Chemistry C, Vol 2, Numéro 18, 14.05.2014, p. 3651-3658.

Résultats de recherche: Contribution à un journal/une revueArticle

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T1 - Improved electrochromic performance and lithium diffusion coefficient in three-dimensionally ordered macroporous V2O5 films

AU - Tong, Zhongqiu

AU - Hao, Jian

AU - Zhang, Kun

AU - Zhao, Jiupeng

AU - Su, Bao Lian

AU - Li, Yao

PY - 2014/5/14

Y1 - 2014/5/14

N2 - Three-dimensionally ordered macroporous (3DOM) vanadium pentoxide (V 2O5) films with various pore diameters were prepared by anodic deposition into colloidal crystal templates. The influence of the 3DOM structure on lithium ion (Li+) diffusion coefficient was investigated for the first time. X-ray diffraction analysis and HRTEM measurements show that the skeleton walls are composed of crystallites and amorphous V 2O5. The study of electrochromic properties indicates that the pore size has a significant impact on the electrochromic performance. Small pores in the film lead to higher optical contrast and faster switching response. A high transmittance modulation in the visible and near-infrared spectral regions (50% at λ = 650 nm and 47% at λ = 900 nm) with fast response time (1.7 s for coloration and 3.2 s for bleaching) is observed in the 3DOM V2O5 film with a pore size of 210 nm. Because of the fully interconnected macroporous network in the 3DOM structure, the transport and reaction of lithium ions and electrons both behave in an effective 3D model throughout the whole nanostructure. Additionally, due to their influence on the polarization of the electrode and surface defects, sharp nanoscale edges around pores and rough surfaces can further promote Li + diffusion and intercalation/de-intercalation. The 3DOM V 2O5 film with a pore size of 210 nm exhibits a very high Li+ diffusion coefficient of 3.78 × 10-9 cm 2 s-1, which is higher than any coefficient ever reported for a V2O5 film. This journal is

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JO - Journal of Materials Chemistry C

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