Abstract
The natural Sri Lanka graphite (vein graphite) is widely-used as anode material for lithium-ion batteries (LIBs), due to its high crystallinity and low cost. In this work, graphitic porous carbon (GPC) and high-purity vein graphite (PVG) were prepared from Sri Lanka graphite ore by KOH activation, and high temperature purification, respectively. Furthermore, a lithium-ion capacitor (LIC) is fabricated with GPC as cathode, and PVG as anode. The assembled GPC//PVG LIC shows a notable electrochemical performance with a maximum energy density of 86 W·h·kg-1 at 150 W·kg-1, and 48 W·h·kg-1 at a high-power density of 7.4 kW·kg-1. This high-performance LIC based on PVG and GPC is believed to be promising for practical applications, due to its low-cost raw materials and industrially feasible production.
Original language | English |
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Article number | 414 |
Journal | Materials |
Volume | 10 |
Issue number | 4 |
DOIs | |
Publication status | Published - 14 Apr 2017 |
Externally published | Yes |
Keywords
- Graphitic porous carbon
- KOH activation
- Lithium-ion capacitor
- Sri Lanka graphite
ASJC Scopus subject areas
- General Materials Science