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Title: Unveiling TiNb2O7 as an insertion anode for lithium ion capacitors with high energy and power density
Authors: Ramakrishna, Seeram
Aravindan, Vanchiappan
Sundaramurthy, Jayaraman
Jain, Akshay
Kumar, Palaniswamy Suresh
Ling, Wong Chui
Srinivasan, Madapusi P.
Madhavi, Srinivasan
Keywords: DRNTU::Engineering::Materials::Metallic materials
Issue Date: 2014
Source: Aravindan, V., Sundaramurthy, J., Jain, A., Kumar, P. S., Ling, W. C., Ramakrishna, S., et al. (2014). Unveiling TiNb2O7 as an Insertion Anode for Lithium Ion Capacitors with High Energy and Power Density. ChemSusChem, 7(7), 1858-1863.
Series/Report no.: ChemSusChem
Abstract: This is the first report of the utilization of TiNb2O7 as an insertion-type anode in a lithium-ion hybrid electrochemical capacitor (Li-HEC) along with an activated carbon (AC) counter electrode derived from a coconut shell. A simple and scalable electrospinning technique is adopted to prepare one-dimensional TiNb2O7 nanofibers that can be characterized by XRD with Rietveld refinement, SEM, and TEM. The lithium insertion properties of such electrospun TiNb2O7 are evaluated in the half-cell configuration (Li/TiNb2O7) and it is found that the reversible intercalation of lithium (≈3.45 mol) is feasible with good capacity retention characteristics. The Li-HEC is constructed with an optimized mass loading based on the electrochemical performance of both the TiNb2O7 anode and AC counter electrode in nonaqueous media. The Li-HEC delivers very high energy and power densities of approximately 43 Wh kg−1 and 3 kW kg−1, respectively. Furthermore, the AC/TiNb2O7 Li-HEC delivers a good cyclability of 3000 cycles with about 84 % of the initial value.
ISSN: 1864-5631
DOI: 10.1002/cssc.201400157
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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