Effect of synthesis conditions on electrochemical properties of LiNi1-yCoyO2 cathode for lithium rechargeable batteries
LiNi1-yCoyO2 samples are prepared by a sol-gel method at various cobalt concentrations (y-value) by sintering at 800DGC for a period of 10 h. An X-ray diffraction technique is used to examine the structural properties of the samples. The sample with a y-value of 0.25 has the largest initial discharg...
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| Veröffentlicht in: | Journal of power sources 2003-03, Vol.114 (2), p.244-252 |
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| creator | HWANG, B. J SANTHANAM, R CHEN, C. H |
| description | LiNi1-yCoyO2 samples are prepared by a sol-gel method at various cobalt concentrations (y-value) by sintering at 800DGC for a period of 10 h. An X-ray diffraction technique is used to examine the structural properties of the samples. The sample with a y-value of 0.25 has the largest initial discharge capacity and shows the best cycling performance. It is concluded that this performance results from better hexagonal ordering, crystallinity, and smaller particle size with good particle-size distribution compared with other samples. LixNi0.75CO0.25O2 samples with different lithium content are also prepared and it is found that Li1.05Ni0.75CO0.25O2 shows the best electrochemical performance. This suggests that the presence of excess lithium prevents the exchange of Nr2+ ions at lithium sites. |
| doi_str_mv | 10.1016/S0378-7753(02)00584-0 |
| format | Article |
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This suggests that the presence of excess lithium prevents the exchange of Nr2+ ions at lithium sites.</description><subject>Applied sciences</subject><subject>Direct energy conversion and energy accumulation</subject><subject>Electrical engineering. 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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Applied sciences Direct energy conversion and energy accumulation Electrical engineering. Electrical power engineering Electrical power engineering Electrochemical conversion: primary and secondary batteries, fuel cells Exact sciences and technology |
| title | Effect of synthesis conditions on electrochemical properties of LiNi1-yCoyO2 cathode for lithium rechargeable batteries |
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