Make particle mechanics work with composite electrodes #11283

Job	Run time
Example notebooks (ubuntu-latest / Python 3.12)	19m 36s
Doctests (ubuntu-latest / Python 3.11)	3m 28s
Example scripts (ubuntu-latest / Python 3.12)	13m 49s
Tests (ubuntu-latest / Python 3.9)	33m 18s
style	24s
Tests (ubuntu-latest / Python 3.10)	33m 1s
Tests (ubuntu-latest / Python 3.11)	30m 49s
Tests (ubuntu-latest / Python 3.12)	22m 16s
Tests (macos-13 / Python 3.9)	22m 36s
Tests (macos-13 / Python 3.10)	37m 46s
Tests (macos-13 / Python 3.11)	19m 7s
Tests (macos-13 / Python 3.12)	34m 20s
Tests (macos-14 / Python 3.9)	14m 10s
Tests (macos-14 / Python 3.10)	11m 59s
Tests (macos-14 / Python 3.11)	11m 53s
Tests (macos-14 / Python 3.12)	10m 54s
Tests (windows-latest / Python 3.9)	37m 11s
Tests (windows-latest / Python 3.10)	38m 45s
Tests (windows-latest / Python 3.11)	32m 24s
Tests (windows-latest / Python 3.12)	30m 33s
	7h 38m 19s

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