A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes
Abstract Improvements in the specific capacity of graphene nanoflake-based anodes cycled vs. Li/Li+ were investigated at two cycling temperatures of 25 and 50 °C. When cycled at 25 °C, the first cycle specific capacity of the graphene nanoflakes was 636 mA h g−1, whereas cycling at 50 °C led to a 35...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-02-01
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| Series: | Materials for Renewable and Sustainable Energy |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40243-018-0110-3 |
| _version_ | 1818026185593978880 |
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| author | Sandeep Bhattacharya Ahmet T. Alpas |
| author_facet | Sandeep Bhattacharya Ahmet T. Alpas |
| author_sort | Sandeep Bhattacharya |
| collection | DOAJ |
| description | Abstract Improvements in the specific capacity of graphene nanoflake-based anodes cycled vs. Li/Li+ were investigated at two cycling temperatures of 25 and 50 °C. When cycled at 25 °C, the first cycle specific capacity of the graphene nanoflakes was 636 mA h g−1, whereas cycling at 50 °C led to a 35% increase in the specific capacity to 856 mA h g−1. High resolution SEM investigations revealed that the increased capacity of graphene cycled at 50 °C was accompanied by the formation of a uniform and continuous solid electrolyte interface (SEI). The strain generated in graphene anodes was reduced from 0.75% at 25 °C, to 0.12% at 50 °C, as determined by in situ Raman spectroscopy. This was attributed to the reduction in the extent of solvent co-intercalation at 50 °C. The results suggest that pre-cycling of Li-ion cell anodes containing graphene flakes at elevated temperatures would increase their specific capacity at the same charging/discharging current densities as that used for cycling at room temperature. |
| first_indexed | 2024-12-10T04:27:59Z |
| format | Article |
| id | doaj.art-3a57b9655f9c4728b877a40c17af10d6 |
| institution | Directory Open Access Journal |
| issn | 2194-1459 2194-1467 |
| language | English |
| last_indexed | 2024-12-10T04:27:59Z |
| publishDate | 2018-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Materials for Renewable and Sustainable Energy |
| spelling | doaj.art-3a57b9655f9c4728b877a40c17af10d62022-12-22T02:02:14ZengSpringerOpenMaterials for Renewable and Sustainable Energy2194-14592194-14672018-02-017211210.1007/s40243-018-0110-3A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodesSandeep Bhattacharya0Ahmet T. Alpas1Engineering Materials Program, Department of Mechanical, Automotive and Materials Engineering, University of WindsorEngineering Materials Program, Department of Mechanical, Automotive and Materials Engineering, University of WindsorAbstract Improvements in the specific capacity of graphene nanoflake-based anodes cycled vs. Li/Li+ were investigated at two cycling temperatures of 25 and 50 °C. When cycled at 25 °C, the first cycle specific capacity of the graphene nanoflakes was 636 mA h g−1, whereas cycling at 50 °C led to a 35% increase in the specific capacity to 856 mA h g−1. High resolution SEM investigations revealed that the increased capacity of graphene cycled at 50 °C was accompanied by the formation of a uniform and continuous solid electrolyte interface (SEI). The strain generated in graphene anodes was reduced from 0.75% at 25 °C, to 0.12% at 50 °C, as determined by in situ Raman spectroscopy. This was attributed to the reduction in the extent of solvent co-intercalation at 50 °C. The results suggest that pre-cycling of Li-ion cell anodes containing graphene flakes at elevated temperatures would increase their specific capacity at the same charging/discharging current densities as that used for cycling at room temperature.http://link.springer.com/article/10.1007/s40243-018-0110-3Graphene nanoflakesLi-ion batterySEITemperatureRateCapacity |
| spellingShingle | Sandeep Bhattacharya Ahmet T. Alpas A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes Materials for Renewable and Sustainable Energy Graphene nanoflakes Li-ion battery SEI Temperature Rate Capacity |
| title | A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes |
| title_full | A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes |
| title_fullStr | A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes |
| title_full_unstemmed | A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes |
| title_short | A novel elevated temperature pre-treatment for electrochemical capacity enhancement of graphene nanoflake-based anodes |
| title_sort | novel elevated temperature pre treatment for electrochemical capacity enhancement of graphene nanoflake based anodes |
| topic | Graphene nanoflakes Li-ion battery SEI Temperature Rate Capacity |
| url | http://link.springer.com/article/10.1007/s40243-018-0110-3 |
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