Na-rich layered Na2Ru0.95Zr0.05O3 cathode material for Na-ion batteries
Autor: | Chaohe Xu, Wei Dong Z. Li, Feng Zheng, Ning Hu, Yu Wang, Qibin Li, Masashi Kotobuki, Li Lu, Shufeng Song |
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Rok vydání: | 2017 |
Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Stacking Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention Chemical engineering Cathode material law Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Mass fraction Current density Faraday efficiency |
Zdroj: | Journal of Power Sources. 342:685-689 |
ISSN: | 0378-7753 |
DOI: | 10.1016/j.jpowsour.2016.12.116 |
Popis: | Structures and electrochemical performances of Na-rich layered cathode Na2RuO3 are studied by substitution of Zr for Ru. Na2Ru0.95Zr0.05O3 exhibits a combination of disordered and ordered stacking state with a weight fraction of ∼61.57% and 38.43%, respectively. The disordered and ordered Na2Ru0.95Zr0.05O3 exhibits reversible capacity of 137 mAh g−1 that is consistent with the theoretical capacity at a current density of 1 C. In addition, the material shows good cyclability with a capacity retention of 77% after 200 cycles at current density of 1 C, and the Coulombic efficiency remains at about 99% during cycling. The structural evolutions of the Na-rich layered Na2Ru0.95Zr0.05O3 during de(sodiation) have been investigated and found to proceed via a biphasic mechanism. |
Databáze: | OpenAIRE |
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