Electrochemically Synthesized Polypyrrole/Graphene Composite Film for Lithium Batteries
| Autor: | Yang Yang, Gordon G. Wallace, Chee O. Too, Sanjeev Gambhir, Binbin Yue, Caiyun Wang |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Dopant Renewable Energy Sustainability and the Environment Graphene Graphene foam Inorganic chemistry Oxide chemistry.chemical_element Polypyrrole Lithium-ion battery law.invention chemistry.chemical_compound chemistry Chemical engineering law General Materials Science Lithium Graphene oxide paper |
| Zdroj: | Advanced Energy Materials. 2:266-272 |
| ISSN: | 1614-6832 |
| DOI: | 10.1002/aenm.201100449 |
| Popis: | A polypyrrole/reduced graphene oxide (PPy/r-GO) composite film is prepared by inducing electrochemical reduction of graphene oxide incorporated into PPy as the dopant. This film has a wrinkled surface morphology with a porous structure as revealed by scanning electron microscopy. Its porous structure is attributed to the physical nature of the GO sheets, providing a templating effect during PPy deposition. This PPy/r-GO composite is characterized using in-situ UV–visible spectroelectrochemistry as well as Raman and Fourier-transform IR spectroscopy. The PPy/r-GO material shows greatly improved electrochemical properties, i.e., a high rate capability and excellent cycling stability when used as a cathode material in a lithium ion battery. It also delivers a large reversible capacity when used as an anode material, and this is mainly attributed to the reduced graphene oxide (r-GO) component. |
| Databáze: | OpenAIRE |
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