Superior Lithium-Ion Storage Properties of Mesoporous CuO-Reduced Graphene Oxide Composite Powder Prepared by a Two-Step Spray-Drying Process
- Authors
- Park, Gi Dae; Kang, Yun Chan
- Issue Date
- 15-6월-2015
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- energy conversion; energy storage materials; nanostructures; spray drying; synthesis design
- Citation
- CHEMISTRY-A EUROPEAN JOURNAL, v.21, no.25, pp.9179 - 9184
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY-A EUROPEAN JOURNAL
- Volume
- 21
- Number
- 25
- Start Page
- 9179
- End Page
- 9184
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/93257
- DOI
- 10.1002/chem.201500303
- ISSN
- 0947-6539
- Abstract
- Mesoporous CuO-reduced graphene oxide (rGO) composite powders were prepared by using a two-step spray-drying process. In the first step, hollow CuO powders were prepared from a spray solution of copper nitrate trihydrate with citric acid and were wet milled to obtain a colloidal spray solution. In the second step, spray drying of the colloidal solution that contained dispersed GO nanosheets produced mesoporous CuO-rGO composite powders with particle sizes of several microns. Thermal reduction of GO nanosheets to rGO nanosheets occurred during post-treatment at 300 degrees C. Initial discharge capacities of the hollow CuO, bare CuO aggregate, and CuO-rGO composite powders at a current density of 2Ag(-1) were 838, 1145, and 1238mAhg(-1), respectively. Their discharge capacities after 200cycles were 259, 380, and 676mAhg(-1), respectively, and their corresponding capacity retentions measured from the second cycle were 67, 48, and 76%, respectively. The mesoporous CuO-rGO composite powders have high structural stability and high conductivity because of the rGO nanosheets, and display good cycling and rate performances.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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