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DOE OSTI · 1631992

Transition-Metal Dissolution from NMC-Family Oxides: A Case Study

Morin, Hannah R.·Graczyk, Donald G.·Tsai, Yifen·Lopykinski, Susan·Iddir, Hakim·Garcia, Juan C.·Dietz Rago, Nancy·Trask, Stephen·Flores, LeRoy·Son, Seoung-Bum·Zhang, Zhengcheng·Johnson, Noah M.·Bloom, Ira
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Abstract

In this work we investigated the static reactions of highly delithiated Li(Ni 1/3 Mn 1/3 Co 1/3 )O 2 , Li(Ni 0.5 Mn 0.3 Co 0.2 )O 2 , Li(Ni 0.6 Mn 0.2 Co 0.2 )O 2 , and Li(Ni 0.8 Mn 0.1 Co 0.1 )O 2 positive electrodes with 2,3-butanedione and with tetrabutyl ammonium bifluoride as model leaching agents. In the bifluoride trials, it was found that [Ni] in the leachate was proportional to X Co ( X Ni ) 3 , where X M is the ideal stoichiometry in the bulk oxide, and inversely proportional to ( X Mn ) 2 ; [Mn] to X Co ( X Ni ); and [Co] to X Co . The relationships between metal concentrations and stoichiometry may indicate that nickel, as a next-nearest neighbor on the positive electrode surface, can make dissolution more favorable in some instances.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYcorrosion by HFcorrosion by electrolyte decompositionkineticslithium-ion batterymetal dissolutionpositive electrode materials

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Morin, Hannah R., Graczyk, Donald G., Tsai, Yifen, Lopykinski, Susan, Iddir, Hakim, Garcia, Juan C., Dietz Rago, Nancy, Trask, Stephen, Flores, LeRoy, Son, Seoung-Bum, Zhang, Zhengcheng, Johnson, Noah M., Bloom, Ira. 2020-02-07. Transition-Metal Dissolution from NMC-Family Oxides: A Case Study. https://doi.org/10.1021/acsaem.9b02277

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