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. 2020 Sep 15;8:816. doi: 10.3389/fchem.2020.00816

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Copyright © 2020 Wu, Shen and Yang.

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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Electrochemistry and redox activities in Na_2/3Ni_1/3Mn_2/3O₂ (NNMO). (A) Electrochemical profile of NNMO with negligible voltage hysteresis. (B) Quantitative evaluation on the electrochemical capacity from TM and O redox. Reprinted from Dai et al. (2020) with permission from Nano Energy.