Abstract
A Li-ion capacitor (LIC) is constructed with Li4Ti5O12/C hybrid as the negative electrode and 3D porous graphene macroform (PGM) as the positive electrode. After optimizing the mass ratio (m+/m-) of the electrode materials with the value of 2, the as-fabricated LIC delivers a maximum energy density of 72 Wh kg-1 with the power density of 650 W kg-1 in a voltage range of 1.0-3.0 V. Furthermore, the energy density of the LIC reaches 40 Wh kg-1 even at a high power density of 8.3 kW kg-1. More significantly, the LIC exhibits a good cycling stability with the retention of 65% after 1000 cycles at a high current density of 10 A g-1, suggesting great potential application in energy storage of the LIC.
Original language | English |
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Pages (from-to) | 174-178 |
Number of pages | 5 |
Journal | Journal of Power Sources |
Volume | 282 |
DOIs | |
Publication status | Published - 15 May 2015 |
Externally published | Yes |
Keywords
- Li-ion capacitor
- LiTiO/C hybrid
- Porous graphene macroform
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering