Mitigating the P2–O2 transition and Na<sup>+</sup>/vacancy ordering in Na<sub>2/3</sub>Ni<sub>1/3</sub>Mn<sub>2/3</sub>O<sub>2</sub> by anion/cation dual-doping for fast and stable Na<sup>+</sup> insertion/extraction
Qianjiang Mao, Yang Yu, Junkai Wang, Lirong Zheng, Zhenya Wang, Yunsheng Qiu, Yongmei Hao, Xiangfeng Liu
Abstract
Ca<sup>2+</sup>/F<sup>−</sup> co-doping mitigates P2–O2 transition and Na<sup>+</sup>/vacancy ordering in P2-type Na<sub>2/3</sub>Ni<sub>1/3</sub>Mn<sub>2/3</sub>O<sub>2</sub>, which significantly improves the rate capability and cycling performance due to the synergy of Ca<sup>2+</sup> and F<sup>−</sup>.
Topics & Concepts
Vacancy defectCrystallographyMaterials scienceAnalytical Chemistry (journal)PhysicsChemistryChromatographyAdvancements in Battery MaterialsAdvanced Battery Materials and TechnologiesAmmonia Synthesis and Nitrogen Reduction