Carbon-coated Li 3 V 2 (PO 4 ) 3 as insertion type electrode for lithium-ion hybrid electrochemical capacitors: An evaluation of anode and cathodic performance
| Autor: | Srinivasan Madhavi, Vanchiappan Aravindan, Rohit Satish, Wong Chui Ling |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Auxiliary electrode
Working electrode Materials science Renewable Energy Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology Electrolyte Electrochemistry Reference electrode Cathode law.invention Anode law Electrode Electrical and Electronic Engineering Physical and Theoretical Chemistry |
| Zdroj: | Journal of Power Sources. 281:310-317 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2015.01.190 |
| Popis: | We first report the possible utilization of carbon-coated Li 3 V 2 (PO 4 ) 3 (LVP-C) phase as insertion type anode and cathode in Lithium-ion hybrid electrochemical capacitor (Li-HEC) applications with activated carbon (AC) counter electrode. Conventional sol–gel technique is utilized to prepare LVP-C and characterized by various techniques like powder X-ray diffraction, field emission scanning electron microscopy and high resolution transmission electron microscopy. Li-cycling studies are performed in half-cell assembly to evaluate the optimum mass loading for the fabrication of Li-HEC. A reversible capacity of ∼125 and ∼91 mAh g −1 is noted (current density of 100 mA g −1 ) when LVP-C is employed as cathode (3–4.3 V vs. Li) and anode (1–3 V vs. Li), respectively. Li-HEC is constructed in an organic electrolyte and tested in two configurations, using LVP-C as positive electrode and AC as the negative electrode (LVP-C/AC) and the second one composed of AC as the positive electrode and LVP-C as the negative electrode (AC/LVP-C). The LVP-C/AC and AC/LVP-C Li-HECs delivered maximum energy densities of ∼27 and ∼25 Wh kg −1 , respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect