title: Biomass-Derived Electrode for Next Generation Lithium-Ion Capacitors.
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 (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.
authors.affiliation: Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju, 500-757, Republic of Korea.
authors.forename: Palanichamy
authors.initials: P
authors.lastname: Sennu
authors.affiliation: Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Research Techno Plaza, 50 Nanyang Drive, Singapore, 637553, Singapore.
authors.forename: Vanchiappan
authors.identifier: 0000-0003-1357-7717
authors.initials: V
authors.lastname: Aravindan
authors.affiliation: Electrochemical Power Sources Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630006, India.
authors.forename: Mahadevan
authors.initials: M
authors.lastname: Ganesan
authors.affiliation: Power Control Device Research Team, Electronics and Telecommunications Research Institute, Daejeon, 305-700, Korea.
authors.forename: Young-Gi
authors.initials: YG
authors.lastname: Lee
authors.affiliation: Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju, 500-757, Republic of Korea. leeys@chonnam.ac.kr.
authors.forename: Yun-Sung
authors.initials: YS
authors.lastname: Lee
mesh_terms: D018533:Biomass; D002244:Carbon / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D007887:Fabaceae; D008094:Lithium / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D002244:Carbon; D008094:Lithium
keywords: Li-ion capacitor; activated carbon; biomass; energy density; graphene