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The Role of Divalent (Zn 2+ /Mg 2+ /Cu 2+ ) Substituents in Achieving Full Capacity of Sodium Layered Oxides for Na-Ion Battery Applications

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Academic year: 2021

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Figure 1: Synthesis optimization of ZNMT material. (a) Powder XRD pattern of the ZNMT material calcined  at different temperature and calcination period, the black vertical line in the figure is used as a guide to eyes  to see the shift in (00l) peak upon
Figure 2: Electrochemical performance of ZNMT and NMT. (a,b) left, Galvanostatic charge- discharge cycle  of (a) ZNMT and (b) NMT materials synthesized at two different synthesis conditions (900 °C/24 h mentioned  as  900  and  re-annealed  1000  °C/12  h
Figure 3:  Operando XRD analysis of (a) ZNMT and (b) NMT materials. The XRD pattern evolutions during  first charge are shown on the right and the corresponding cycling curves in the left
Figure  4:  TEM  analyses  of  the  ZNMT  and  NMT  materials  at  the  end  of  charge  with  the  stoichiometry,  Na 0.2 Ni 0.45 Zn 0.05 Mn 0.4 Ti 0.1 O 2  and Na 0.1 Ni 0.5 Mn 0.4 Ti 0.1 O 2 , respectively
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