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A simple reduction process to synthesize MoO 2 /C composites with cage-like structure for high-performance lithium-ion batteries

Large-scale MoO 2 /carbon composites with a cage-like nanostructure have been synthesized by a simple hydrothermal reduction process. During the hydrothermal process, ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 4H 2 O) was employed as starting material and ascorbic acid as a structure direc... Full description

Journal Title: Physical Chemistry Chemical Physics 2013, Vol.15(22), pp.8831-8837
Main Author: Liu, Bing
Other Authors: Zhao, Xinyu , Tian, Yuan , Zhao, Di , Hu, Changwen , Cao, Minhua
Format: Electronic Article Electronic Article
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ID: ISSN: 1463-9076 ; E-ISSN: 1463-9084 ; DOI: 10.1039/c3cp44707c
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recordid: rscc3cp44707c
title: A simple reduction process to synthesize MoO 2 /C composites with cage-like structure for high-performance lithium-ion batteries
format: Article
creator:
  • Liu, Bing
  • Zhao, Xinyu
  • Tian, Yuan
  • Zhao, Di
  • Hu, Changwen
  • Cao, Minhua
subjects:
  • Reduction
  • Cycles
  • Carbon
  • Current Density
  • Electrodes
  • Carbon-Carbon Composites
  • Lithium-Ion Batteries
  • Binders
  • Nanostructure
  • Miscellaneous Sciences (So)
  • Design Principles (Mt)
  • General and Nonclassified (Ep)
  • General and Nonclassified (Ed)
  • General and Nonclassified (EC)
ispartof: Physical Chemistry Chemical Physics, 2013, Vol.15(22), pp.8831-8837
description: Large-scale MoO 2 /carbon composites with a cage-like nanostructure have been synthesized by a simple hydrothermal reduction process. During the hydrothermal process, ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 4H 2 O) was employed as starting material and ascorbic acid as a structure directing agent, reductive agent and carbon source. MoO 2 /C nanospheres with diameters of about 1525 nm were interconnected to form a cage-like architecture. Time-dependent experiments illustrated that the cage-like structure was transformed from tightly packed MoO 2 nanoparticles. Furthermore, with a water-soluble binder (sodium alginate), the cage-like MoO 2 /C composites exhibited a high discharge capacity and significantly improved cycling performance compared to previously reported MoO 2 -based anode materials. The electrodes with the MoO 2 /C composites can deliver a capacity of 692.5 mA h g 1 after 80 chargedischarge cycles at a current density of 200 mA g 1 . After C-rate measurement, the battery still can maintain excellent cycling stability (about 550 mA h g 1 reversible capacity retained even after 475 cycles). The excellent electrochemical performance can be ascribed to the cage-like structure, which integrates three advantages: porous structure, interconnected MoO 2 /C framework and small nano-crystals.
language:
source:
identifier: ISSN: 1463-9076 ; E-ISSN: 1463-9084 ; DOI: 10.1039/c3cp44707c
fulltext: no_fulltext
issn:
  • 1463-9076
  • 1463-9084
  • 14639084
  • 14639076
url: Link


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titleA simple reduction process to synthesize MoO 2 /C composites with cage-like structure for high-performance lithium-ion batteries
creatorLiu, Bing ; Zhao, Xinyu ; Tian, Yuan ; Zhao, Di ; Hu, Changwen ; Cao, Minhua
ispartofPhysical Chemistry Chemical Physics, 2013, Vol.15(22), pp.8831-8837
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descriptionLarge-scale MoO 2 /carbon composites with a cage-like nanostructure have been synthesized by a simple hydrothermal reduction process. During the hydrothermal process, ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 4H 2 O) was employed as starting material and ascorbic acid as a structure directing agent, reductive agent and carbon source. MoO 2 /C nanospheres with diameters of about 1525 nm were interconnected to form a cage-like architecture. Time-dependent experiments illustrated that the cage-like structure was transformed from tightly packed MoO 2 nanoparticles. Furthermore, with a water-soluble binder (sodium alginate), the cage-like MoO 2 /C composites exhibited a high discharge capacity and significantly improved cycling performance compared to previously reported MoO 2 -based anode materials. The electrodes with the MoO 2 /C composites can deliver a capacity of 692.5 mA h g 1 after 80 chargedischarge cycles at a current density of 200 mA g 1 . After C-rate measurement, the battery still can maintain excellent cycling stability (about 550 mA h g 1 reversible capacity retained even after 475 cycles). The excellent electrochemical performance can be ascribed to the cage-like structure, which integrates three advantages: porous structure, interconnected MoO 2 /C framework and small nano-crystals.
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subjectReduction ; Cycles ; Carbon ; Current Density ; Electrodes ; Carbon-Carbon Composites ; Lithium-Ion Batteries ; Binders ; Nanostructure ; Miscellaneous Sciences (So) ; Design Principles (Mt) ; General and Nonclassified (Ep) ; General and Nonclassified (Ed) ; General and Nonclassified (EC);
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titleA simple reduction process to synthesize MoO 2 /C composites with cage-like structure for high-performance lithium-ion batteries
descriptionLarge-scale MoO 2 /carbon composites with a cage-like nanostructure have been synthesized by a simple hydrothermal reduction process. During the hydrothermal process, ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 4H 2 O) was employed as starting material and ascorbic acid as a structure directing agent, reductive agent and carbon source. MoO 2 /C nanospheres with diameters of about 1525 nm were interconnected to form a cage-like architecture. Time-dependent experiments illustrated that the cage-like structure was transformed from tightly packed MoO 2 nanoparticles. Furthermore, with a water-soluble binder (sodium alginate), the cage-like MoO 2 /C composites exhibited a high discharge capacity and significantly improved cycling performance compared to previously reported MoO 2 -based anode materials. The electrodes with the MoO 2 /C composites can deliver a capacity of 692.5 mA h g 1 after 80 chargedischarge cycles at a current density of 200 mA g 1 . After C-rate measurement, the battery still can maintain excellent cycling stability (about 550 mA h g 1 reversible capacity retained even after 475 cycles). The excellent electrochemical performance can be ascribed to the cage-like structure, which integrates three advantages: porous structure, interconnected MoO 2 /C framework and small nano-crystals.
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abstractLarge-scale MoO 2 /carbon composites with a cage-like nanostructure have been synthesized by a simple hydrothermal reduction process. During the hydrothermal process, ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 4H 2 O) was employed as starting material and ascorbic acid as a structure directing agent, reductive agent and carbon source. MoO 2 /C nanospheres with diameters of about 1525 nm were interconnected to form a cage-like architecture. Time-dependent experiments illustrated that the cage-like structure was transformed from tightly packed MoO 2 nanoparticles. Furthermore, with a water-soluble binder (sodium alginate), the cage-like MoO 2 /C composites exhibited a high discharge capacity and significantly improved cycling performance compared to previously reported MoO 2 -based anode materials. The electrodes with the MoO 2 /C composites can deliver a capacity of 692.5 mA h g 1 after 80 chargedischarge cycles at a current density of 200 mA g 1 . After C-rate measurement, the battery still can maintain excellent cycling stability (about 550 mA h g 1 reversible capacity retained even after 475 cycles). The excellent electrochemical performance can be ascribed to the cage-like structure, which integrates three advantages: porous structure, interconnected MoO 2 /C framework and small nano-crystals.
doi10.1039/c3cp44707c
pages8831-8837
date2013-05-15