Thermal restacking of graphene structure to improve lithium-air battery cyclability
| Autor: | Jangwoo Kim, Joseph M. Carlin, Soshana Smith, Jun Yin, Yong Lak Joo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Graphene chemistry.chemical_element 02 engineering and technology Thermal treatment Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention Stress (mechanics) lcsh:Chemistry chemistry Chemical engineering lcsh:Industrial electrochemistry lcsh:QD1-999 law Thermal Electrochemistry 0210 nano-technology Carbon Lithium–air battery lcsh:TP250-261 |
| Zdroj: | Electrochemistry Communications, Vol 70, Iss, Pp 43-46 (2016) |
| ISSN: | 1388-2481 |
| Popis: | Poor rechargeability is one of major drawbacks of lithium-air batteries. Our study reveals that the accumulation and subsequent removal of reaction products during cycles can lead to a serious disruption and volume expansion of the cathode structure and demonstrates that by restacking and realigning the three phase interface of the cycled cathodes via mild heat treatment results in the enhanced cycle performance by over 200% and reduces the discharge overpotential at the same time. The results stress the importance of maintaining the physical configuration of lithium-air cathodes, and provide a new insight towards pulling out capacity retention of the system by better utilization of the available carbon surface. Keywords: Lithium air, Lithium oxygen, Restacking, Volume expansion, Reduced graphene oxide, Thermal treatment |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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