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|Title: ||Time-Dependent in-Situ Neutron Diffraction Investigation of a Li(Co0.16Mn1.84)O4 Cathode|
|Authors: ||Sharma, N|
|Keywords: ||Neutron Diffraction|
|Issue Date: ||3-Nov-2011|
|Publisher: ||American Chemical Society|
|Citation: ||Sharma, N., Reddy, M.V., Du, G.D., Adams, S., Chowdari, B.V.R., Guo, Z.P., Peterson, V.K. (2011). Time-Dependent in-Situ Neutron Diffraction Investigation of a Li(Co0.16Mn1.84)O4 Cathode. Journal of Physical Chemistry C, 115(43), 21473-21480.|
|Abstract: ||Real-time in-situ neutron diffraction data reveal for the first time that the Li(Co0.16Mn1.84)O4 cathode undergoes current-free discharge. We find that current-free discharge occurs in a partially charged Li(Co0.16Mn1.84)O4 cathode during its first charge cycle over a period of 11 h resulting in a 44(2)% expansion of the crystal lattice. The rate of change in the lattice parameter during the current-free discharge process is half the rate and more linear than for an applied-current discharge of ?0.5 mA. The origins of current-free discharge are discussed along with the implications of nonequilibrium relaxation processes in in-situ neutron and X-ray diffraction studies. We show that the lattice does not return to the predischarge values after either current-applied or current-free discharge, indicating a limited ability for Li reinsertion (capacity loss) in partially charged Li(Co0.16Mn1.84)O4 batteries. © 2011, American Chemical Society|
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