The electrochemical study of the LiNi0.8Co0.2O2 with a additive in electrolyte
碩士 === 輔仁大學 === 化學系 === 103 === The electrochemical effects of LiNi0.8Co0.2O2 cathode material with the electrolyte additives (biphenyl and thiophene) had been studied. The LiNi0.8Co0.2O2 was synthesized by co-precipitation method and measured the physical properties by scanning electron microscope/...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/34955719770669720570 |
| Summary: | 碩士 === 輔仁大學 === 化學系 === 103 === The electrochemical effects of LiNi0.8Co0.2O2 cathode material with the electrolyte additives (biphenyl and thiophene) had been studied. The LiNi0.8Co0.2O2 was synthesized by co-precipitation method and measured the physical properties by scanning electron microscope/ energy dispersive spectroscopy (SEM/EDS), X-ray diffraction spectroscopy (XRD) and inductively coupled plasma (ICP). The electropolymerization of biphenyl and thiophene had been observed in the potential range of 2.8 V to 4.3 V by linear sweep voltammetry and cyclic voltammetry. After adding 0.1 wt.%/0.5 wt.% of biphenyl or thiophene, the initial discharge-capacities were not decreased but the irreversible capacities were increased. The cycle-life and rate-capability of battery were improved while both of the biphenyl and thiophene were added in the electrolyte. For the AC impedance analysis, the co-electropolymer film of biphenyl and thiophene on the surface of the cathode material can decrease the resistance of electron-transfer.
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