Studies on Co-oxidation resistances of electrolytes based on sulfolane and lithium bis(oxalato)borate
| Autor: | Hong-Ming Zhang, Cong-Cong Yang, Fan-Jie Xu, Zhi-Fang Zhou, Xiaoling Cui |
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| Rok vydání: | 2017 |
| Předmět: |
Battery (electricity)
Chemistry 020209 energy Inorganic chemistry chemistry.chemical_element 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology Electrochemistry Redox Cathode Dielectric spectroscopy law.invention chemistry.chemical_compound law 0202 electrical engineering electronic engineering information engineering Lithium Sulfolane 0210 nano-technology |
| Zdroj: | Russian Journal of Electrochemistry. 53:352-358 |
| ISSN: | 1608-3342 1023-1935 |
| DOI: | 10.1134/s1023193517040139 |
| Popis: | How to exert the high-voltage performance of LiNi0.5Mn1.5O4 and break through the bottleneck effect of corresponding electrolyte have become key points in advanced lithium-ion battery. Lithium bis(oxalato) borate (LiBOB) and sulfolane (SL) are chosen as additives to investigate their effects on the electrochemical performance of lithium-ion battery with LiNi0.5Mn1.5O4 cathode. The quantum chemistry calculation theory shows that oxidation potential of SL–BOB– is dramatically increased, consistent with the experimental result in CV measurement. Meanwhile, results of CV and charge–discharge cycling indicate that LiBOB and SL would be involved in the initial oxidation reaction to form an effective solid electrolyte interface film on surfaces of the cathode electrode thus enhance the cycling performance of LiNi0.5Mn1.5O4/Li cells. Electrochemical impedance spectroscopy data proves that SL is beneficial to resistance decrease. All these data will become important corroborations that the combined electrolyte LiBOB and SL have good oxidation resistances. |
| Databáze: | OpenAIRE |
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