One-pot synthesis of core-shell-structured tin oxide-carbon composite powders by spray pyrolysis for use as anode materials in Li-ion batteries

Young Jun Hong, Yun Chan Kang

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Abstract Core-shell-structured tin oxide-carbon composite powders with mixed SnO2 and SnO tetragonal crystals are prepared by one-pot spray pyrolysis from a spray solution with tin oxalate and polyvinylpyrrolidone (PVP). The aggregate, made up of SnOx nanocrystals (several tens of nanometers), is uniformly coated with an amorphous carbon layer. The initial discharge capacities of the bare SnO2 and SnOx-carbon composite powders at a current density of 1 A g-1 are 1473 and 1667 mA h g-1, respectively; their discharge capacities after 500 cycles are 78 and 1033 mA h g-1, respectively. The SnOx-carbon composite powders maintain their spherical morphology even after 500 cycles. On the other hand, the bare SnO2 powder breaks into several pieces after cycling. The structural stability of the SnOx-carbon composite powders results in a low charge transfer resistance and high lithium ion diffusion rate even after 500 cycles at a high current density of 2 A g-1. Therefore, the SnOx-carbon composite powders have superior electrochemical properties compared with those of the bare SnO2 powders with a fine size.

Original languageEnglish
Article number9756
Pages (from-to)262-269
Number of pages8
JournalCarbon
Volume88
DOIs
Publication statusPublished - 2015 Jul 1

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Spray pyrolysis
Powders
Anodes
Carbon
Composite materials
Current density
Povidone
Oxalates
Tin
Amorphous carbon
Lithium-ion batteries
stannic oxide
Electrochemical properties
Lithium
Nanocrystals
Charge transfer
Ions
Crystals

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

One-pot synthesis of core-shell-structured tin oxide-carbon composite powders by spray pyrolysis for use as anode materials in Li-ion batteries. / Hong, Young Jun; Kang, Yun Chan.

In: Carbon, Vol. 88, 9756, 01.07.2015, p. 262-269.

Research output: Contribution to journalArticle

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abstract = "Abstract Core-shell-structured tin oxide-carbon composite powders with mixed SnO2 and SnO tetragonal crystals are prepared by one-pot spray pyrolysis from a spray solution with tin oxalate and polyvinylpyrrolidone (PVP). The aggregate, made up of SnOx nanocrystals (several tens of nanometers), is uniformly coated with an amorphous carbon layer. The initial discharge capacities of the bare SnO2 and SnOx-carbon composite powders at a current density of 1 A g-1 are 1473 and 1667 mA h g-1, respectively; their discharge capacities after 500 cycles are 78 and 1033 mA h g-1, respectively. The SnOx-carbon composite powders maintain their spherical morphology even after 500 cycles. On the other hand, the bare SnO2 powder breaks into several pieces after cycling. The structural stability of the SnOx-carbon composite powders results in a low charge transfer resistance and high lithium ion diffusion rate even after 500 cycles at a high current density of 2 A g-1. Therefore, the SnOx-carbon composite powders have superior electrochemical properties compared with those of the bare SnO2 powders with a fine size.",
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N2 - Abstract Core-shell-structured tin oxide-carbon composite powders with mixed SnO2 and SnO tetragonal crystals are prepared by one-pot spray pyrolysis from a spray solution with tin oxalate and polyvinylpyrrolidone (PVP). The aggregate, made up of SnOx nanocrystals (several tens of nanometers), is uniformly coated with an amorphous carbon layer. The initial discharge capacities of the bare SnO2 and SnOx-carbon composite powders at a current density of 1 A g-1 are 1473 and 1667 mA h g-1, respectively; their discharge capacities after 500 cycles are 78 and 1033 mA h g-1, respectively. The SnOx-carbon composite powders maintain their spherical morphology even after 500 cycles. On the other hand, the bare SnO2 powder breaks into several pieces after cycling. The structural stability of the SnOx-carbon composite powders results in a low charge transfer resistance and high lithium ion diffusion rate even after 500 cycles at a high current density of 2 A g-1. Therefore, the SnOx-carbon composite powders have superior electrochemical properties compared with those of the bare SnO2 powders with a fine size.

AB - Abstract Core-shell-structured tin oxide-carbon composite powders with mixed SnO2 and SnO tetragonal crystals are prepared by one-pot spray pyrolysis from a spray solution with tin oxalate and polyvinylpyrrolidone (PVP). The aggregate, made up of SnOx nanocrystals (several tens of nanometers), is uniformly coated with an amorphous carbon layer. The initial discharge capacities of the bare SnO2 and SnOx-carbon composite powders at a current density of 1 A g-1 are 1473 and 1667 mA h g-1, respectively; their discharge capacities after 500 cycles are 78 and 1033 mA h g-1, respectively. The SnOx-carbon composite powders maintain their spherical morphology even after 500 cycles. On the other hand, the bare SnO2 powder breaks into several pieces after cycling. The structural stability of the SnOx-carbon composite powders results in a low charge transfer resistance and high lithium ion diffusion rate even after 500 cycles at a high current density of 2 A g-1. Therefore, the SnOx-carbon composite powders have superior electrochemical properties compared with those of the bare SnO2 powders with a fine size.

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