Abstract
Graphene-MnO composite and hollow-structured MnO powders are prepared by a simple one-pot spray pyrolysis process. The graphene content in the graphene-MnO composite powder is estimated to be 10 wt.%. The fine MnO crystals of size several tens of nanometers are uniformly distributed all over the graphene. The BET specific surface areas of the graphene-MnO composite and hollow-structured MnO powders are found to be 20 and 5 m2 g-1, respectively. The graphene-MnO composite powders have high initial discharge and charge capacities of 1207 and 849 mA h g-1, respectively, at a current density of 500 mA g-1. The initial discharge and charge capacities of the hollow-structured MnO powders are 1004 and 673 mA h g-1, respectively. The discharge capacities of the graphene-MnO composite and hollow-structured MnO powders for the 130th cycle are 1313 and 701 mA h g-1, respectively.
Original language | English |
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Pages (from-to) | 441-447 |
Number of pages | 7 |
Journal | Electrochimica Acta |
Volume | 132 |
DOIs | |
Publication status | Published - 2014 Jun 20 |
Externally published | Yes |
Keywords
- Graphene
- anode material
- lithium ion battery
- manganese monoxide
- spray pyrolysis
ASJC Scopus subject areas
- Chemical Engineering(all)
- Electrochemistry