Journal
JOURNAL OF POWER SOURCES
Volume 136, Issue 1, Pages 160-170Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2004.05.023
Keywords
activated carbon; Li-ion battery; supercapacitor; power-ion battery; LiCoO2
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A 40 Wh/kg Li-ion battery using a Li4Ti5O12 nanostructured anode and a composite activated carbon LiCoO2 cathode was built using plastic Li-ion processing based on PVDF-HFP binder and soft laminate packaging. The specific power of the device is similar to that of an electrochemical double-layer supercapacitor (4000 W/kg). The high power is enabled by a combination of a nanostructured negative electrode, an acetonitrile based electrolyte and an activated carbon/LiCoO2 composite positive electrode. This enables very fast charging (full recharge in 3 min). The effect of electrode formulation and matching ratio on energy, power and cycle-life are described. Optimization of these parameters led to a cycle-life of 20% capacity loss after 9000 cycles at full depth of discharge (DOD). (C) 2004 Elsevier B.V. All rights reserved.
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