High performance Na sub(x)CoO sub(2) as a cathode material for rechargeable sodium batteries
Sodium cobalt oxide (NCO) has been synthesized by a glycine assisted sol-gel combustion method. XRD studies confirm the P2 phase formation of NCO. Na exists in two different environments in the NCO crystallite structure, which is confirmed by super(23)Na Nuclear Magnetic Resonance spectra (NMR). Mor...
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| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-08, Vol.3 (35), p.18059-18063 |
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| container_issue | 35 |
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| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
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| creator | Rami Reddy, BVenkata Ravikumar, R Nithya, C Gopukumar, S |
| description | Sodium cobalt oxide (NCO) has been synthesized by a glycine assisted sol-gel combustion method. XRD studies confirm the P2 phase formation of NCO. Na exists in two different environments in the NCO crystallite structure, which is confirmed by super(23)Na Nuclear Magnetic Resonance spectra (NMR). Morphological studies confirm that the particles are unique with a stacked hexagonal shape. Galvanostatic charge/discharge studies performed at different current rates (0.1, 0.2 and 0.5) deliver reversible specific capacities of 126, 108 and 77 mA h g super(-1) respectively. Further, cycle life performance of the fabricated cells after 50 cycles at 0.1 C rate exhibits an average discharge capacity of ~121 mA h g super(-1) with a capacity retention of ~86% (Coulombic efficiency ~99.9%). The investigated NCO's superior performance suggests its suitability as a cathode material for Na-ion batteries. |
| doi_str_mv | 10.1039/c5ta03173g |
| format | Article |
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XRD studies confirm the P2 phase formation of NCO. Na exists in two different environments in the NCO crystallite structure, which is confirmed by super(23)Na Nuclear Magnetic Resonance spectra (NMR). Morphological studies confirm that the particles are unique with a stacked hexagonal shape. Galvanostatic charge/discharge studies performed at different current rates (0.1, 0.2 and 0.5) deliver reversible specific capacities of 126, 108 and 77 mA h g super(-1) respectively. Further, cycle life performance of the fabricated cells after 50 cycles at 0.1 C rate exhibits an average discharge capacity of ~121 mA h g super(-1) with a capacity retention of ~86% (Coulombic efficiency ~99.9%). The investigated NCO's superior performance suggests its suitability as a cathode material for Na-ion batteries.</description><identifier>ISSN: 2050-7488</identifier><identifier>EISSN: 2050-7496</identifier><identifier>DOI: 10.1039/c5ta03173g</identifier><language>eng</language><subject>Cathodes ; Crystallites ; Discharge ; Energy (nuclear) ; Nuclear magnetic resonance ; Rechargeable batteries ; Sodium ; Spectra</subject><ispartof>Journal of materials chemistry. 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Na exists in two different environments in the NCO crystallite structure, which is confirmed by super(23)Na Nuclear Magnetic Resonance spectra (NMR). Morphological studies confirm that the particles are unique with a stacked hexagonal shape. Galvanostatic charge/discharge studies performed at different current rates (0.1, 0.2 and 0.5) deliver reversible specific capacities of 126, 108 and 77 mA h g super(-1) respectively. Further, cycle life performance of the fabricated cells after 50 cycles at 0.1 C rate exhibits an average discharge capacity of ~121 mA h g super(-1) with a capacity retention of ~86% (Coulombic efficiency ~99.9%). 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| identifier | ISSN: 2050-7488 |
| ispartof | Journal of materials chemistry. A, Materials for energy and sustainability, 2015-08, Vol.3 (35), p.18059-18063 |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Cathodes Crystallites Discharge Energy (nuclear) Nuclear magnetic resonance Rechargeable batteries Sodium Spectra |
| title | High performance Na sub(x)CoO sub(2) as a cathode material for rechargeable sodium batteries |
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