Electronic modification of NaCrO2via Ni2+ substitution as efficient cathode for sodium-ion batteries
Jingyao Cai,
Yanbing Zhu,
Zhiguo Zhang
et al.
Abstract:The feature of high theoretical capacity, long thermal stability, and low-cost fabrication offers the layered transition metal oxide NaCrO2 as an excellent candidate for sodium-ion batteries. Here, we show an effective method for electronic modulation of NaCrO2 by partial substitution of Cr3+ with low-valent Ni2+ to produce NaCr0.95Ni0.05O2 as an efficient cathode for these batteries. We found that Ni2+ substitution plays a critical role in the ionic character of transition metal-oxygen bonds, which increases … Show more
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