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@ARTICLE{Jakes:127349,
author = {Jakes, Peter and Cohn, Gil and Ein-Eli, Yair and Scheiba,
Frieder and Ehrenberg, Helmut and Eichel, Rüdiger-A.},
title = {{L}imitation of {D}ischarge {C}apacity and {M}echanisms of
{A}ir-{E}lectrode {D}eactivation in {S}ilicon-{A}ir
{B}atteries},
journal = {ChemSusChem: chemistry $\&$ sustainability, energy $\&$
materials},
volume = {5},
number = {11},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2012-00349},
pages = {2278–2285},
year = {2012},
abstract = {The electrocatalytical process at the air cathode in novel
silicon–air batteries using the room-temperature ionic
liquid hydrophilic 1-ethyl-3-methylimidazolium
oligofluorohydrogenate [EMI⋅2.3 HF⋅F] as electrolyte and
highly doped silicon wafers as anodes is investigated by
electrochemical means, X-ray photoelectron spectroscopy
(XPS), and electron paramagnetic resonance (EPR)
spectroscopy. The results obtained by XPS and EPR provide a
model to describe the limited discharge capacity by means of
a mechanism of air-electrode deactivation. In that respect,
upon discharge the silicon-air battery′s cathode is not
only blocked by silicon oxide reduction products, but also
experiences a major modification in the MnO2 catalyst
nature. The proposed modification of the MnO2 catalyst by
means of a MnF2 surface layer greatly impacts the Si–air
performance and describes a mechanism relevant for other
metal–air batteries, such as the lithium–air. Moreover,
the ability for this deactivation layer to form is greatly
impacted by water in the electrolyte.},
cin = {IEK-9},
ddc = {540},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {152 - Renewable Energies (POF2-152)},
pid = {G:(DE-HGF)POF2-152},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000311056800026},
doi = {10.1002/cssc.201200199},
url = {https://juser.fz-juelich.de/record/127349},
}