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000865566 1001_ $$0P:(DE-HGF)0$$aZehetmaier, Peter M.$$b0
000865566 245__ $$aNanosized Lithium-rich Cobalt Oxide Particles and their Transformation to Lithium Cobalt Oxide Cathodes with Optimized High-rate Morphology
000865566 260__ $$aWashington, DC$$bAmerican Chemical Society$$c2019
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000865566 520__ $$aWe report the formation of crystalline dispersible LixCo1-xO nanoparticles with an unusual rock-salt phase containing ~15 at%  Li  in  the  crystalline  structure.  This  is  the  first  time  that  this  composition  was  formed  at  temperatures  as  low  as  150 °C under  conditions  of  a  solvothermal  process,  although  it  is  referred  to  as  a  high  temperature  metastable  phase  in  a  very  limited number of known publications. The Li0.15Co0.85O nanoparticles of 2-3 nm in size completely transform to high-temperature LiCoO2(HT-LCO) nanoparticles at 560 °C in the presence of slightly overstoichiometric amounts of Li source. The presence of lithium in the CoO lattice slows down the kinetics of its phase transformation, enabling to obtain very small HT-LCO nanocrystals during the subsequent calcination. The HT-LCO particles formed after this transformation have an elongated shape with a mean size of about 17  x 60 nm, which is targeted as an optimum size for battery applications. An attractive feature of the Li0.15Co0.85O nanoparticles is their  high  dispersibility  enabling  their  assembly  into  different  nanostructures  with  optimized  morphology.  Open  porous  HT-LCO electrodes  prepared  via  self-assembly  of  Li0.15Co0.85O  nanoparticles  and  Pluronic  F127  as  a  structure-directing  agent  demonstrate very   good   performance   at   high   current   densities   representing   short   charge/discharge   times   below   10   minutes.   Even   at charge/discharge   times   of   72   seconds   (50C),   50%   of   the   theoretical   capacity   has   been   preserved.   After   250   cycles   at charge/discharge times of 6 minutes (10C), over 60% of the initial discharge capacity was retained
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000865566 7001_ $$0P:(DE-HGF)0$$aCornélis, Arnaud$$b1
000865566 7001_ $$0P:(DE-Juel1)179146$$aZoller, Florian$$b2
000865566 7001_ $$0P:(DE-HGF)0$$aBoeller, Bernhard$$b3
000865566 7001_ $$0P:(DE-HGF)0$$aWisnet, Andreas$$b4
000865566 7001_ $$0P:(DE-HGF)0$$aDöblinger, Markus$$b5
000865566 7001_ $$0P:(DE-HGF)0$$aBoehm, Daniel$$b6
000865566 7001_ $$0P:(DE-HGF)0$$aBein, Thomas$$b7
000865566 7001_ $$0P:(DE-HGF)0$$aFattakhova-Rohlfing, Dina$$b8$$eCorresponding author
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