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@ARTICLE{Jakes:256252,
author = {Jakes, Peter and Granwehr, Josef and Kungl, Hans and
Eichel, Rüdiger-A.},
title = {{M}ixed {I}onic–{E}lectronic {C}onducting {L}i4{T}i5{O}12
as {A}node {M}aterial for {L}ithium {I}on {B}atteries with
{E}nhanced {R}ate {C}apability – {I}mpact of {O}xygen
{N}on-{S}toichiometry and {A}liovalent {M}g2+-{D}oping
{S}tudied by {E}lectron {P}aramagnetic {R}esonance},
journal = {Zeitschrift für physikalische Chemie},
volume = {229},
number = {9},
issn = {2196-7156},
address = {Berlin},
publisher = {De @Gruyter},
reportid = {FZJ-2015-06219},
pages = {1439-1450},
year = {2015},
abstract = {Spinel-type Li4Ti5O12 is an attractive anode material for
lithium-ion battery applications owing to its high specific
energy and almost vanishing mechanical strain upon
Li-(de)intercalation. The impact of oxygen non-stoichiometry
and aliovalent Mg-doping on the defect chemistry of
Li4Ti5O12 has been characterized by quantitative electron
paramagnetic resonance (EPR) spectroscopy. The results
obtained demonstrate that the Mg2+-ions are amphoterically
incorporated at the here studied concentrations on both
lithium (MgLi•) and titanium (Mg′′Ti) sites.
Mg2+-doping thus simultaneously results in the formation of
donor (MgLi•) and acceptor (Mg′′Ti) centers.
Furthermore, upon both oxygen deficiency and Mg2+-doping,
the concentration of `polaronic'-type Ti3+-states is
increased, accounting for the enhanced electronic
conductivity.},
cin = {IEK-9},
ddc = {540},
cid = {I:(DE-Juel1)IEK-9-20110218},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000363494500014},
doi = {10.1515/zpch-2015-0618},
url = {https://juser.fz-juelich.de/record/256252},
}