Abstract
Sodium ion batteries are being considered as an alternative to lithium ion batteries in large-scale energy storage applications owing to the low cost. A novel titanate compound, NaAlTi3O8, was successfully synthesized and tested as a promising anode material for sodium ion batteries. Powder X-ray Diffraction (XRD) and refinement were used to analyze the crystal structure. Electrochemical cycling tests under a C/10 rate between 0.01 - 2.5 V showed that ~83 mAh/g capacity could be achieved in the second cycle, with ~75% of which retained after 100 cycles, which corresponds to 0.75 Na+ insertion and extraction. The influence of synthesis conditions on electrochemical performances was investigated and discussed. NaAlTi3O8 not only presents a new anode material with low average voltage of ~0.5V, but also provides a new type of intercalation anode with a crystal structure that differentiates from the anodes that have been reported.
| Original language | English |
|---|---|
| Article number | 162 |
| Journal | Scientific Reports |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2017 |
Funding
H.C. and X.M. thank the funding support from the National Science Foundation under award #1410936 and from Georgia Institute of Technology new faculty start-up fund. H.C. and X.M. thank Dr. Yuanzhi Tang for providing lab space and facilities for part of the experiments. H.C. and X.M. thank Dr. Yong Ding for help in TEM, EDS, and EELS experiments. The authors thank the support of Department of Energy, office of Basic Science, through the general user programs of the user facilities at NSLS and APS. A portion of this research used resources at the Spallation Neutron Source (SNS), a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.
| Funders | Funder number |
|---|---|
| Basic Science | |
| National Science Foundation | 1410936 |
| U.S. Department of Energy | |
| Oak Ridge National Laboratory | |
| Georgia Institute of Technology |
