Title

Hollow hematite nanosphere/carbon nanotube composite: mass production and its high-rate lithium storage properties

RIS ID

37095

Publication Details

Chou, S., Wang, J., Chen, Z., Liu, H. K. & Dou, S. Xue. (2011). Hollow hematite nanosphere/carbon nanotube composite: mass production and its high-rate lithium storage properties. Nanotechnology, 22 (26), 1-5.

Abstract

Spray pyrolysis was used to produce hollow hematite (α-Fe(2)O(3)) nanosphere (HHNS)/carbon nanotube (CNT) composite on a large scale. The method offers simplicity, high productivity, versatility, low cost, and suitability for industry. The structure is composed of hollow nanospheres in a network of CNTs. The possible formation mechanism of hollow α-Fe(2)O(3) nanospheres is due to the rapid evaporation of water and the super-hydrophobicity of the CNT surface. The electrochemical tests show that the HHNS/CNT composite is a promising lithium storage material in terms of high capacity (∼700 mAh g(-1)), good high-rate capability, and good cycle life (up to 150 cycles). The materials improve both lithium ion and electron transport, which are limiting factors on the high-rate capability of lithium-ion batteries. The production method can be easily adapted to produce a wide range of hollow metal oxide nanosphere/CNT composites.

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Link to publisher version (DOI)

http://dx.doi.org/10.1088/0957-4484/22/26/265401