Co3O4 Nanosheets as Battery-Type Electrode for High-Energy Li-Ion Capacitors: A Sustained Li-Storage via Conversion Pathway
| Autor: | Vanchiappan Aravindan, Palanichamy Sennu, Srinivasan Madhavi, Yun-Sung Lee |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Battery (electricity) Materials science General Engineering General Physics and Astronomy 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences law.invention Capacitor Chemical engineering law Electrode medicine General Materials Science 0210 nano-technology Mesoporous material Activated carbon medicine.drug |
| Zdroj: | ACS Nano. 14:10648-10654 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.0c04950 |
| Popis: | We report the excellent charge storage performance of high-energy Li-ion capacitors (LIC) fabricated from the mesoporous Co3O4 nanosheets as the conversion-type battery component and Jack fruit (Artocarpus heterophyllus) derived activated carbon as a supercapacitor electrode, especially at high temperatures (50 and 40 °C). Prior to the fabrication, the electrochemical prelithiation strategy was applied to Co3O4 to alleviate the irreversibility and enrich the Li-ions for electrochemical reactions (Co0 + Li2O). The LIC delivered a maximum energy density of ∼118 Wh kg-1 at a high temperature of 50 °C. The significant difference is observed at a high rate of 2.6 kW kg-1 at 50 °C with excellent cycle stability up to 3000 cycles, with a retention of ∼87% compared with the LIC cycled at room temperature (∼74%). The magnificent electrochemical performance clearly demonstrates that the mesoporous structure and residual carbon synergistically facilitated the Li+/electron transport and hinder undesirable side reactions with electrolytes to realize high-energy density at high temperatures. |
| Databáze: | OpenAIRE |
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