Synthesis and Electrochemical Characterizations of Al Gradient-doped LiCoO2 Cathode Material
碩士 === 輔仁大學 === 化學系 === 107 === In this study, an Al gradient-doped LiCoO2 (LCO) cathode was prepared via chemical co-precipitation followed by calcination. The average doping concentration of Al in the Al(GD)-LCO was ~2 mol.% with ~4 mol.% on the particle surface. Al(GD)-LCO returned values for ini...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2019
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| Online Access: | http://ndltd.ncl.edu.tw/handle/y6p3pt |
| Summary: | 碩士 === 輔仁大學 === 化學系 === 107 === In this study, an Al gradient-doped LiCoO2 (LCO) cathode was prepared via chemical co-precipitation followed by calcination. The average doping concentration of Al in the Al(GD)-LCO was ~2 mol.% with ~4 mol.% on the particle surface. Al(GD)-LCO returned values for initial efficiency, rate capability and cycle-life that were superior to those of LCO. The AC-impedance and PITT results indicate that the Al-rich surface of Al(GD)-LCO reduced the charge-transfer resistance(Rct) and enhanced the diffusion of Li+ by minimizing the side reactions with the electrolyte. All the results showed that the Al gradient-doped LCO cathode material effectively improve the electrochemical performances of LCO cathode material at high voltage.
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