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@ARTICLE{Wu:864400,
author = {Wu, Xiaochao and Meledina, Maria and Barthel, Juri and Liu,
Zigeng and Tempel, Hermann and Kungl, Hans and Mayer,
Joachim and Eichel, Rüdiger-A.},
title = {{I}nvestigation of the {L}i-{C}o antisite exchange in
{F}e-substitued {L}i{C}o{PO}4 cathode for high-voltage
lithium ion batteries},
journal = {Energy storage materials},
volume = {22},
issn = {2405-8297},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {FZJ-2019-04192},
pages = {138 - 146},
year = {2019},
abstract = {Carbon coated olivine Pnma LiCoPO4 (LCP/C) and
Fe-substituted LiCo0.8Fe0.2PO4 (LCFP/C) were synthesized by
a solvothermal method and their structural features and
electrochemical properties were investigated. The
electrochemical performance of LCFP/C is better than that of
LCP/C, owing to the partial substitution of Co by Fe which
effectively suppresses the increasement of antisite exchange
between Li+ and Co2+ ions within the structure during
cycling, despite a similar amount of Li–Co antisite
exchange in pristine LCP/C and LCFP/C samples. Furthermore,
direct visualization of Co in Li sites in the pristine
samples and after 50 cycles was achieved through
high-resolution scanning transmission electron microscopy
for both LCP/C and LCFP/C. It was found that LCP/C locally
formed a new cation-ordered structure after cycling due to
the Li–Co antisite exchange, while the structure of LCFP/C
remains almost the same. This study provides direct evidence
that Fe substitution reduced the Li–Co exchange and
improved the electrochemical cycling life of the LiCoPO4
cathode for high-voltage lithium ion batteries.},
cin = {IEK-9 / ER-C-2},
ddc = {624},
cid = {I:(DE-Juel1)IEK-9-20110218 / I:(DE-Juel1)ER-C-2-20170209},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000488256300014},
doi = {10.1016/j.ensm.2019.07.004},
url = {https://juser.fz-juelich.de/record/864400},
}