Influence of Potassium Metal-Support Interactions on Dendrite Growth.
Angew Chem Int Ed Engl
; 62(23): e202300943, 2023 Jun 05.
Article
en En
| MEDLINE
| ID: mdl-36893078
ABSTRACT
Combined synchrotron X-ray nanotomography imaging, cryogenic electron microscopy (cryo-EM) and modeling elucidate how potassium (K) metal-support energetics influence electrodeposit microstructure. Three model supports are employed O-functionalized carbon cloth (potassiophilic, fully-wetted), non-functionalized cloth and Cu foil (potassiophobic, nonwetted). Nanotomography and focused ion beam (cryo-FIB) cross-sections yield complementary three-dimensional (3D) maps of cycled electrodeposits. Electrodeposit on potassiophobic support is a triphasic sponge, with fibrous dendrites covered by solid electrolyte interphase (SEI) and interspersed with nanopores (sub-10â
nm to 100â
nm scale). Lage cracks and voids are also a key feature. On potassiophilic support, the deposit is dense and pore-free, with uniform surface and SEI morphology. Mesoscale modeling captures the critical role of substrate-metal interaction on K metal film nucleation and growth, as well as the associated stress state.
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MEDLINE
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En
Revista:
Angew Chem Int Ed Engl
Año:
2023
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Article
País de afiliación:
Estados Unidos