alexa High Performance Of Li-ion Capacitors And Internal Li-ion Capacitor/Li-ion Battery Hybrid Cells
ISSN: 2161-0398

Journal of Physical Chemistry & Biophysics
Open Access

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3rd International Conference on Electrochemistry
July 10-11, 2017 Berlin, Germany

Jim P Zheng, Annadanesh Shellikeri, Mark Hagon, Junshen Zheng and Wanjun Cao
Florida A&M University, USA
Florida State University, USA
Posters & Accepted Abstracts: J Phys Chem Biophys
DOI: 10.4172/2161-0398-C1-020
Abstract
We have fabricated pouch cells of Li-ion capacitor (LIC), which is a new energy storage device which consists of an electric double layer capacitance (EDLC) cathode and a Li-ion battery (LIB) anode, between which the ions shuttle during charge and discharge processes. The LIC not only retained all the advantages of EDLC such as specific power >5 kW/kg and cycle life >100,000 cycles; but also had higher specific energy of 15-30 Wh/kg and higher maximum cell voltage of 4.1 V than that of EDLC. The LIC has a wide operating temperature range from -40 to 70ÂșC. Because the potentials of anode and cathode as well as the maximum cell voltage of LIC is comparable to that of LIB, it allows the LIC and LIB to be assembled in one package as a monolithic LIB/LIC hybrid cell. The energy density and power density of the hybrid cell will be designed to meet the requirements by a reasonable distribution of the ratio between LIB and LIC electrodes in a hybrid cell. For example, a LIB/LIC hybrid cell was made with a 20 wt.% LiFePO4 and 80% activated carbon cathode and pre-lithiated hard carbon anode, the specific energy increased by 20% to compare with LIC.
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