Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 164, Issue 2, Pages A93-A98Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0351702jes
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Funding
- Florida-Israel Partnership Aerospace Track & R&D Aerospace Program through Space Florida [15-118]
- U.S. ARMY CERDEC RD Program [GTS-S-16-037]
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High performance Li-ion capacitor (LIC) laminate cells have been fabricated with activated carbon positive electrodes (PEs) and hard carbon/lithium stripes negative electrodes (NEs). The lithium stripes on the surface of NEs enable a novel pre-lithiation approach for the LIC cells. The LIC laminate cells can achieve a maximum specific power of 6 kW kg(-1) and a maximum power density of 12 kW L-1. The specific energy and energy density of the LIC laminate cells are 14 Wh kg(-1) and 28 Wh L-1 respectively, which is about 3 times of the traditional electric double layer capacitors (EDLCs). The DC life of such LIC cell has passed 2000 h testing while held at maximum operation voltage 3.8 V and 65 degrees C. Extended cycle performance under 50 C rate of the LIC laminate cell has been tested: such LIC can remain 89% of the original discharge capacitance after 100,000 cycles without obvious changes in ESR value. When the LIC cell is charging and discharging under 125 C rate, the cycle life is still more than 50,000 cycles. (C) 2016 The Electrochemical Society. All rights reserved.
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