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Title: Time-dependent in-situ neutron diffraction investigation of a Li(Co 0.16Mn1.84)O4 cathode
Authors: Sharma, N.
Reddy, M.V. 
Du, G.
Adams, S. 
Chowdari, B.V.R. 
Guo, Z.
Peterson, V.K.
Issue Date: 3-Nov-2011
Citation: Sharma, N., Reddy, M.V., Du, G., Adams, S., Chowdari, B.V.R., Guo, Z., Peterson, V.K. (2011-11-03). Time-dependent in-situ neutron diffraction investigation of a Li(Co 0.16Mn1.84)O4 cathode. Journal of Physical Chemistry C 115 (43) : 21473-21480. ScholarBank@NUS Repository.
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.
Source Title: Journal of Physical Chemistry C
ISSN: 19327447
DOI: 10.1021/jp2026237
Appears in Collections:Staff Publications

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