Question about battery -- Looking into the electrode effects on the battery

[hagopbul]

TL;DR Summary

looking into the electrodes effects on the battery

Hello All :

i had few suggestions about battery enhancement using some ideas which i had just abstract understanding not enough even to suggest discussion but i have this question

why we dont fold the anode and the cathode into geometrical shape , wouldnt that increase the number of electrons that move between them during charge and discharge ?

if we fold them into geometrical shape would we have irregular electric field effecting each segment of them ?

if we increase the number of electrons moving between the anode and the cathode would that mean higher ampere which means smaller lighter batteries ?
sadly i am away now from the academic life or the research life so an answer to this question would take very long time from me ?
Best
Hagop

 

[hutchphd]

Batteries are chemical devices. The voltage is determined by the electrochemistry at an interface, and the maximum current by the area and composition of that interface. The other major geometric design consideration is heat dissipation vs compactnessl.

 

[hagopbul]

with folding the cathode and anode wouldnt that increase the shared surface which means high probability for electron to move , resulting in more electron moving increasing the electron number per unit time , it is really a solid state physics not a chemistry question :)

but with folding isnt every unit area is exposed to more than one electric field resulting from neighboring electrode , with the vector sum not the same as the next or previous unit area

also i agree with you on the other major geometric design consideration

 

[hutchphd]

Many batteries roll up the cathode and the anode to pack more surface area in a smaller volume. This is not what I would call "solid state physics"
The things you seem to be envisioning will likely not be useful because diffusion rates will not be permanently much affected by these modifications. If you fold (wrinkle) the surface, then the valleys are less effective than the hills in projecting electric ields and not much changes in the overall throughput. Also these surfaces are often not stable.

 

[Bystander]

https://news.mit.edu/2022/controlli...s an increase in,that allow dendrites to form.