Fundamentals of Wearable Computers and Augmented Reality, 2nd Edition

644 Fundamentals of Wearable Computers and Augmented Reality

cycling (Figure 24.3e). They usually display very rectangular voltammograms,

where the area under the curve is proportional to the charge stored.

Pseudocapacitors (Figure 24.2b schematic): These store charge through fast redox

and intercalation processes (Figure 24.3c). They typically store more energy than a

double layer capacitor but less than a battery, and can last for ~10,000 cycles. Unlike

a battery, they can be charged at rates comparable to double layer capacitors, on

the order of seconds or minutes. Typical cyclic voltammograms for these devices

may have corresponding peaks indicating that reversible surface reactions are taking

place or are featureless just like those o ...