Large-Scale Production of MoO3-Reduced Graphene Oxide Powders with Superior Lithium Storage Properties by Spray-Drying Process
- Authors
- Park, Gi Dae; Kim, Jong Hwa; Choi, Yun Ju; Kang, Yun Chan
- Issue Date
- 10-8월-2015
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Electrochemical properties; Molybdenum oxide; Reduced graphene oxide; Spray drying; Carbon composite
- Citation
- ELECTROCHIMICA ACTA, v.173, pp.581 - 587
- Indexed
- SCIE
SCOPUS
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 173
- Start Page
- 581
- End Page
- 587
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/92770
- DOI
- 10.1016/j.electacta.2015.05.090
- ISSN
- 0013-4686
- Abstract
- A MoO3-reduced graphene oxide (rGO) composite powder with spherical shape is prepared by a simple spray-drying process by applying a water-soluble metal salt. Ammonium molybdate-GO composite powders prepared by spray drying turn into a MoO3-rGO powder by heat treatment at 300 degrees C under air atmosphere. The MoO3 nanocrystals are uniformly dispersed in a crumpled spherical rGO structure. MoO3 and MoO3-C powders, both with spherical particles, are also prepared by the same process for comparison of their electrochemical properties. The discharge capacities of the MoO3, MoO3-C, and MoO3-rGO powders after 100 cycles at a current density of 500 mA g(-1) are 506, 738, and 1115 mA h g(-1), respectively, and their corresponding capacity retentions measured from the second cycle are 53, 71, and 92%, respectively. The rGO layers improve the structural stability and electric conductivity of the MoO3-rGO composite powder. Therefore, the MoO3-rGO powder shows superior electrochemical properties as compared with the MoO3 and MoO3-C powders prepared by the same preparation procedure. (C)2015 Elsevier Ltd. All rights reserved.
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