In reply to Jed Rothwell's message of Fri, 16 Jun 2023 11:00:06 -0400: Hi, [snip] >A lithium AAA battery electrode is: > > - Diameter: 10.5 to 11.6 millimeters > - Height: 4.8 to 5.6 millimeters > - Positive electrode surface area: 0.1 to 0.2 square centimeters > - Negative electrode surface area: 0.2 to 0.3 square centimeters
First, you should ask yourself why they would give a battery a height of about 30 mm, if the electrodes are only 4.8 to 5.6 mm in height. If the diameter is about 1 cm, then the circumference is about 3 cm, multiplied by a height of about 1/2 cm, gives an area of about 1.5 sq. cm, not a fraction of a sq. cm. However, I suspect that the concept of area is a bit irrelevant at the atomic scale in a battery, as the ions actually migrate into one of the electrodes in a Lithium ion battery IIRC. In short, I wouldn't trust these figures. [snip] Buy electric cars and recharge them from solar panels on your roof.
