Submicro-sized porous SiO2/C and SiO2/C/graphene spheres for lithium ion batteries
| Autor: | Xiaohong Xia, Yuxi Chen, Yuede He, Hongbo Liu, Zhiming Xiang, Jin Li |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Graphene Carbonization Inorganic chemistry Graphene foam chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Anode law.invention chemistry law General Materials Science Lithium Electrical and Electronic Engineering 0210 nano-technology Mesoporous material Porosity |
| Zdroj: | Journal of Solid State Electrochemistry. 21:2425-2432 |
| ISSN: | 1433-0768 1432-8488 |
| DOI: | 10.1007/s10008-017-3566-7 |
| Popis: | In order to improve electrochemical performance of inert SiO2 anode for lithium ion batteries, submicro-sized porous SiO2/C and SiO2/C/graphene spheres with the same SiO2 content (43 wt.%) have been synthesized through a simple suspension nebulization and spray pyrolysis method followed by carbonization, where the components of the spheres are mixed uniformly. The addition of graphene results in mesoporous structure of the SiO2/C/graphene spheres. The electrochemical performances of the porous SiO2/C and SiO2/C/graphene spheres have been evaluated, which indicate that the SiO2/C/graphene spheres exhibits much higher cyclic capacity and stability than SiO2/C with reversible capacity retention of 97% over 100 cycles. The graphene additives display very strong effects in reducing charge transfer resistance and improving structural stability of the porous spheres simultaneously. The mesoporous SiO2/C/graphene spheres are promising anode candidate for high energy-density lithium ion batteries. |
| Databáze: | OpenAIRE |
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