The Nonaqueous Asymmetric Hybrid Technology: Materials, Electrochemical Properties and Performance in Plastic Cells

摘要

The non-aqueous asymmetric hybrid technology utilizing activated carbon or organoredox positive electrodes and nanocrystalline lithium titanate negative electrode delivers performance in the void between battery and supercapacitor technology. Depending on cell size, chemistry and balancing, the packaged asymmetric hybrid device in its plastic form can deliver energy densities 12-20Wh/kg and power densities from 1000 to 3000 W/kg. Cycling stability, robustness, and low temperature characteristics are similar to that of a supercapacitor due to the unique physical/electrochemical properties of the nanocrystalline Li_4Ti_5O_(12) Li intercalation compound. Although not a replacement for supercapacitors in msec pulse applications, or battery/fuel cell technology for applications where high energy is required, there are a number of emerging technologies where the use of this technology may be uniquely advantageous. These range from 42V and hybrid automobile applications to power buffers for fuel cells during startup and peak power spikes.