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- Title
Tailoring MoO<sub>2</sub>/Graphene Oxide Nanostructures for Stable, High-Density Sodium-Ion Battery Anodes.
- Authors
Huang, Jianfeng; Xu, Zhanwei; Cao, Liyun; Zhang, Qinglin; Ouyang, Haibo; Li, Jiayin
- Abstract
A preform-decomposition process is employed to prepare a composite of MoO2 nanoparticles (≈100 nm) anchored on graphene oxide (MoO2/GO) for sodium-ion battery anodes. The discharge gravimetric (volumetric) capacity of the MoO2/GO is 483 mAh g−1 (by active material ≈2318 mAh cm−3) at the current density of 100 mA g−1 after 10 cycles. After 100 cycles, the discharge gravimetric (volumetric) capacity was maintained at 345 mAh g−1 (≈1656 mAh cm−3) and stabilized. During the first 1000 cycles, the capacity degradation is only 1.9 % for each 100 cycles, and the electrode is still able to deliver 276 mAh g−1 after 1000 cycles. Moreover, the nanostructures are able to withstand high rate cycling, the capacity can be fully recovered after being cycled at a rate as high as 2000 mA g−1. The promising electrochemical performance can be attributed to the high electronic conductivity of MoO2 and the connected nanostructures, which facilitate both fast electronic and ionic transport.
- Subjects
LITHIUM-ion batteries; GRAPHENE oxide; SODIUM ions
- Publication
Energy Technology, 2015, Vol 3, Issue 11, p1108
- ISSN
2194-4288
- Publication type
Article
- DOI
10.1002/ente.201500160