Battery knowledge · Electrochemistry fundamentals
Electric double layer
The thin region at an electrode surface where ions in the electrolyte line up against the charge on the electrode, behaving like a capacitor. It stores a little charge without any reaction and shapes the high-frequency part of an impedance spectrum.
Example
Capacitor charge and energy
At 5 V: 25 C and 62.5 J.
Ideal constant capacitance; leakage, series resistance and voltage rating excluded.
Explore the graph
Charge rises linearly with voltage; energy rises with voltage squared.
At 5 V: 25 C and 62.5 J.
Q = CV; E = ½CV²
Illustrative model. Ideal constant capacitance; leakage, series resistance and voltage rating excluded.
Use in Lemonergy
Connect reaction sites and transport paths.
This is a reference concept. No executable Lemonergy block has been verified for this term.
References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- Quantities, Units and Symbols in Physical Chemistry, 3rd edition, 2nd printing
IUPAC · 2011
Topic background · Physical-chemistry notation, thermodynamics, electrochemistry and transport quantities.