Exploring Li substituted O3-structured layered oxides NaLixNi1/3−xMn1/3+xCo1/3−xO2 (x = 0.07, 0.13, and 0.2) as promising cathode materials for rechargeable Na batteries

Exploring Li substituted O3-structured layered oxides NaLixNi1/3−xMn1/3+xCo1/3−xO2 (x=0.07, 0.13, and 0.2) as promising cathode materials for rechargeable Na batteries

O3-type Na(Mn0.25Fe0.25Co0.25Ni0.25)O2: A quaternary layered cathode compound for rechargeable Na ion batteries

a r t i c l e i n f o Sodium Na-ion battery We report a new layered Na(Mn 0.25 Fe 0.25 Co 0.25 Ni 0.25)O 2 compound with O3 oxygen stacking. It delivers 180 mAh/g initial discharge capacity and 578 Wh/kg specific energy density with good cycling capability at high cutoff voltage. In situ X-ray diffraction (XRD) shows a reversible structure evolution of O3-P3-O3′-O3″ upon Na de-intercalation. Th...

A new O3-type layered oxide cathode with high energy/power density for rechargeable Na batteries.

A new O3-Na(0.78)Li(0.18)Ni(0.25)Mn(0.583)O(w) is prepared as the cathode material for Na-ion batteries, delivering exceptionally high energy density and superior rate performance. The single-slope voltage profile and ex situ synchrotron X-ray diffraction data demonstrate that no phase transformation happens through a wide range of sodium concentrations (up to 0.8 Na removed). Ni(2+)/Ni(4+) is ...

Poly(benzoquinonyl sulfide) as a High‐Energy Organic Cathode for Rechargeable Li and Na Batteries

In concern of resource sustainability and environmental friendliness, organic electrode materials for rechargeable batteries have attracted increasing attentions in recent years. However, for many researchers, the primary impression on organic cathode materials is the poor cycling stability and low energy density, mainly due to the unfavorable dissolution and low redox potential, respectively. ...

New High Capacity Cathode Materials for Rechargeable Li-ion Batteries: Vanadate-Borate Glasses

V2O5 based materials are attractive cathode alternatives due to the many oxidation state switches of vanadium bringing about a high theoretical specific capacity. However, significant capacity losses are eminent for crystalline V2O5 phases related to the irreversible phase transformations and/or vanadium dissolution starting from the first discharge cycle. These problems can be circumvented if ...