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Long Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability

Nanorods of δ‐CaVOHO, a straczekite group mineral with an open double‐layered structure, have been successfully fabricated by a facile hydrothermal method and can be transformed into the tunnel β geometry (β‐CaVO) through a vacuum annealing treatment. The generated β‐CaVO still preserves the nanorod... Full description

Journal Title: Chemistry – A European Journal 21 September 2017, Vol.23(53), pp.13221-13232
Main Author: Ma, Yining
Other Authors: Zhou, Huaijuan , Zhang, Shuming , Gu, Sui , Cao, Xun , Bao, Shanhu , Yao, Heliang , Ji, Shidong , Jin, Ping
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0947-6539 ; E-ISSN: 1521-3765 ; DOI: 10.1002/chem.201702814
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recordid: wj10.1002/chem.201702814
title: Long Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability
format: Article
creator:
  • Ma, Yining
  • Zhou, Huaijuan
  • Zhang, Shuming
  • Gu, Sui
  • Cao, Xun
  • Bao, Shanhu
  • Yao, Heliang
  • Ji, Shidong
  • Jin, Ping
subjects:
  • Cathode Materials
  • Lithium Storage
  • Straczekite
  • Vanadium Bronze
ispartof: Chemistry – A European Journal, 21 September 2017, Vol.23(53), pp.13221-13232
description: Nanorods of δ‐CaVOHO, a straczekite group mineral with an open double‐layered structure, have been successfully fabricated by a facile hydrothermal method and can be transformed into the tunnel β geometry (β‐CaVO) through a vacuum annealing treatment. The generated β‐CaVO still preserves the nanorod construction of δ‐CaVOHO without substantial sintering and degradation of the nanostructure. As cathode materials, both calcium vanadium bronzes exhibit high reversible capacity, good rate capability, as well as superior cyclability. Compared with the hydrated vanadium bronze, the β‐CaVO nanorods show better cycling performance (81.68 and 97.93 % capacity retention after 200 cycles at 100 and 400 mA g, respectively) and excellent long‐term cyclic stability with an average decay of 0.035 % per cycle over 500 cycles at 500 mA g. Note that the double‐layered δ‐CaVOHO electrode irreversibly converts into β‐CaVO phase during the initial Li insertion/extraction process, while in contrast, the β‐phase calcium vanadium bronze electrode shows excellent structural stability during cycling. The excellent electrochemical performance demonstrates that the two calcium vanadium bronzes are potential cathode candidates for rechargeable lithium‐ion batteries. : Straczekite δ‐CaVOHO could be converted into the tunnel β geometry through either a vacuum annealing treatment or the lithiation/delithiation process. Both of the calcium vanadium bronzes exhibit excellent cycling stability as cathode materials for lithium ion batteries.
language: eng
source:
identifier: ISSN: 0947-6539 ; E-ISSN: 1521-3765 ; DOI: 10.1002/chem.201702814
fulltext: fulltext
issn:
  • 0947-6539
  • 09476539
  • 1521-3765
  • 15213765
url: Link


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titleLong Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability
creatorMa, Yining ; Zhou, Huaijuan ; Zhang, Shuming ; Gu, Sui ; Cao, Xun ; Bao, Shanhu ; Yao, Heliang ; Ji, Shidong ; Jin, Ping
ispartofChemistry – A European Journal, 21 September 2017, Vol.23(53), pp.13221-13232
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subjectCathode Materials ; Lithium Storage ; Straczekite ; Vanadium Bronze
descriptionNanorods of δ‐CaVOHO, a straczekite group mineral with an open double‐layered structure, have been successfully fabricated by a facile hydrothermal method and can be transformed into the tunnel β geometry (β‐CaVO) through a vacuum annealing treatment. The generated β‐CaVO still preserves the nanorod construction of δ‐CaVOHO without substantial sintering and degradation of the nanostructure. As cathode materials, both calcium vanadium bronzes exhibit high reversible capacity, good rate capability, as well as superior cyclability. Compared with the hydrated vanadium bronze, the β‐CaVO nanorods show better cycling performance (81.68 and 97.93 % capacity retention after 200 cycles at 100 and 400 mA g, respectively) and excellent long‐term cyclic stability with an average decay of 0.035 % per cycle over 500 cycles at 500 mA g. Note that the double‐layered δ‐CaVOHO electrode irreversibly converts into β‐CaVO phase during the initial Li insertion/extraction process, while in contrast, the β‐phase calcium vanadium bronze electrode shows excellent structural stability during cycling. The excellent electrochemical performance demonstrates that the two calcium vanadium bronzes are potential cathode candidates for rechargeable lithium‐ion batteries. : Straczekite δ‐CaVOHO could be converted into the tunnel β geometry through either a vacuum annealing treatment or the lithiation/delithiation process. Both of the calcium vanadium bronzes exhibit excellent cycling stability as cathode materials for lithium ion batteries.
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titleLong Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability
descriptionNanorods of δ‐CaVOHO, a straczekite group mineral with an open double‐layered structure, have been successfully fabricated by a facile hydrothermal method and can be transformed into the tunnel β geometry (β‐CaVO) through a vacuum annealing treatment. The generated β‐CaVO still preserves the nanorod construction of δ‐CaVOHO without substantial sintering and degradation of the nanostructure. As cathode materials, both calcium vanadium bronzes exhibit high reversible capacity, good rate capability, as well as superior cyclability. Compared with the hydrated vanadium bronze, the β‐CaVO nanorods show better cycling performance (81.68 and 97.93 % capacity retention after 200 cycles at 100 and 400 mA g, respectively) and excellent long‐term cyclic stability with an average decay of 0.035 % per cycle over 500 cycles at 500 mA g. Note that the double‐layered δ‐CaVOHO electrode irreversibly converts into β‐CaVO phase during the initial Li insertion/extraction process, while in contrast, the β‐phase calcium vanadium bronze electrode shows excellent structural stability during cycling. The excellent electrochemical performance demonstrates that the two calcium vanadium bronzes are potential cathode candidates for rechargeable lithium‐ion batteries. : Straczekite δ‐CaVOHO could be converted into the tunnel β geometry through either a vacuum annealing treatment or the lithiation/delithiation process. Both of the calcium vanadium bronzes exhibit excellent cycling stability as cathode materials for lithium ion batteries.
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titleLong Straczekite δ‐Ca0.24V2O5⋅H2O Nanorods and Derived β‐Ca0.24V2O5 Nanorods as Novel Host Materials for Lithium Storage with Excellent Cycling Stability
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abstractNanorods of δ‐CaVOHO, a straczekite group mineral with an open double‐layered structure, have been successfully fabricated by a facile hydrothermal method and can be transformed into the tunnel β geometry (β‐CaVO) through a vacuum annealing treatment. The generated β‐CaVO still preserves the nanorod construction of δ‐CaVOHO without substantial sintering and degradation of the nanostructure. As cathode materials, both calcium vanadium bronzes exhibit high reversible capacity, good rate capability, as well as superior cyclability. Compared with the hydrated vanadium bronze, the β‐CaVO nanorods show better cycling performance (81.68 and 97.93 % capacity retention after 200 cycles at 100 and 400 mA g, respectively) and excellent long‐term cyclic stability with an average decay of 0.035 % per cycle over 500 cycles at 500 mA g. Note that the double‐layered δ‐CaVOHO electrode irreversibly converts into β‐CaVO phase during the initial Li insertion/extraction process, while in contrast, the β‐phase calcium vanadium bronze electrode shows excellent structural stability during cycling. The excellent electrochemical performance demonstrates that the two calcium vanadium bronzes are potential cathode candidates for rechargeable lithium‐ion batteries. : Straczekite δ‐CaVOHO could be converted into the tunnel β geometry through either a vacuum annealing treatment or the lithiation/delithiation process. Both of the calcium vanadium bronzes exhibit excellent cycling stability as cathode materials for lithium ion batteries.
doi10.1002/chem.201702814
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pages13221-13232
date2017-09-21