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Biomass‐Derived Electrode for Next Generation Lithium‐Ion Capacitors
Author(s) -
Sennu Palanichamy,
Aravindan Vanchiappan,
Ganesan Mahadevan,
Lee YoungGi,
Lee YunSung
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501621
Subject(s) - electrochemistry , lithium (medication) , materials science , electrode , carbon fibers , fabrication , chemical engineering , graphite , power density , nanotechnology , chemistry , composite material , composite number , medicine , alternative medicine , pathology , engineering , endocrinology , power (physics) , physics , quantum mechanics
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 (2448±20 m 2 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.