High-rate nano-crystalline Li4Ti5O12 attached on carbon nano-fibers for hybrid supercapacitors
| Autor: | Katsuhiko Naoi, Yusaku Isobe, Shintaro Aoyagi, Shuichi Ishimoto |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Supercapacitor
Electrolytic capacitor Materials science Renewable Energy Sustainability and the Environment Composite number Energy Engineering and Power Technology Titanate chemistry.chemical_compound Chemical engineering chemistry Nanofiber Electrode medicine Electrical and Electronic Engineering Physical and Theoretical Chemistry Lithium titanate Activated carbon medicine.drug |
| Zdroj: | Journal of Power Sources. 195:6250-6254 |
| ISSN: | 0378-7753 |
| Popis: | A lithium titanate (Li4Ti5O12)-based electrode which can operate at unusually high current density (300 C) was developed as negative electrode for hybrid capacitors. The high-rate Li4Ti5O12 electrode has a unique nano-structure consisting of unusually small nano-crystalline Li4Ti5O12 (ca. 5–20 nm) grafted onto carbon nano-fiber anchors (nc-Li4Ti5O12/CNF). This nano-structured nc-Li4Ti5O12/CNF composite are prepared by simple sol–gel method under ultra-centrifugal force (65,000 N) followed by instantaneous annealing at 900 °C for 3 min. A model hybrid capacitor cell consisting of a negative nc-Li4Ti5O12/CNF composite electrode and a positive activated carbon electrode showed high energy density of 40 Wh L−1 and high power density of 7.5 kW L−1 comparable to conventional EDLCs. |
| Databáze: | OpenAIRE |
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