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Biomass‐Derived Electrode for Next Generation Lithium‐Ion Capacitors
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- Authors
- Palanichamy Sennu, Vanchiappan Aravindan, Mahadevan Ganesan, Young-Gi Lee, Yun-Sung Lee
- Issue Date
- 2016-04
- Citation
- ChemSusChem, v.9, no.8, pp.849-854
- ISSN
- 1864-5631
- Language
- English
- Type
- Journal Article
- Abstract
- We report the fabrication of a carbon-based high energy density Li-ion hybrid electrochemical capacitor (Li-HEC) from low cost and eco-friendly materials. High surface area (2448짹20 m2 g-1) activated carbon (AC) is derived from the environmentally threatening plant, Prosopis juliflora, and used as the positive electrode in a Li-HEC assembly. Natural graphite is employed as negative electrode and electrochemically pre-lithiated prior to the Li-HEC fabrication. The Li-HEC delivers a specific energy of 162.3 Wh kg-1 and exhibits excellent cyclability (i.e., ~79 % of initial capacity is retained after 7000 cycles). The superior electrochemical performance of Li-HEC benefits from the tube-like unique structural features of the AC. Also, the presence of a graphitic nanocarbon network improves the ion transport, and the formed micro- and meso-porous network acts as reservoir for the accommodation of charge carriers.
- KSP Keywords
- Activated carbon(AC), Charge carriers, Eco-friendly materials, Excellent cyclability, High energy density, Hybrid electrochemical capacitor, Ion transport, Li-ion, Low-cost, Meso-porous, Micro-