Synthesis and Electrochemical Performance of Layerd NaNi0.5Mn0.5O2 as Cathodes for Sodium Ion Batteries
- Synthesis and Electrochemical Performance of Layerd NaNi0.5Mn0.5O2 as Cathodes for Sodium Ion Batteries
- 이용호; 이지은; 김동원; 이중기; 최원창
- Issue Date
- International Conference on Advanced Electromaterials 2013 (ICAE 2013)
- The layered NaMO2 which is analogous to layered LiMO2 (M=transion metal) has received considerable attention recently as the cathode material of rechargeable sodium battery applications. The layered-structured NaNi0.5Mn0.5O2 material synthesized at 900oC with pelletization using co-precipitation method exhibits the high crystallinity without any impurity phases. In galvanostatic cycling test, NaNi0.5Mn0.5O2 cathodes with cut-off voltages of 2.2-3.8 and 2.2-4.5 V, respectively, deliver the initial discharge capacity about 130 mAh/g and 173 mAh/g. Also, cycle test was successfully carried out at 0.05C rate between 2.2 and 3.85 V with the capacity retention of 65.2% after 50cycles. The synthesized samples were evaluated by various analysis techniques such as X-ray diffraction, Field Emission Scanning Electron Microscopy and X-ray photoelectron spectroscopy.
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