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. 2019 May 14;7:335. doi: 10.3389/fchem.2019.00335

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Copyright © 2019 Zhang, Zhang and Huang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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SEM images of (a) pristine NaNi_1/3Mn_1/3Co_1/3O₂, (b) NaNi_1/3Mn_1/3Co_1/3O₂ after 15 days air-exposure, (c) NaNi_1/3Mn_1/3Co_1/3O₂ after 30 days air-exposure. (d) Infrared spectrum of NaNi_1/3Mn_1/3Co_1/3O₂ after 30 days air-exposure. Reproduced with permission (Sathiya et al., 2012). Copyright 2012, American Chemical Society. (e) SEM image of extracted sample, the sample is prepared by drying the aqueous solution of water-NaFeO₂ mixture, (f) XRD patterns of the extracted sample and commercial Na₂CO₃. Reproduced with permission (Monyoncho and Bissessur, 2013). Copyright 2013, Elsevier.