Cathode

Co-Free Layered Oxide Cathode MAterial For Sodium-Ion Batteries

Cathode

Co-Free Layered Oxide Cathode Material For Sodium-ion Batteries

Synthesis of a new SIB cathode material: Replacing Co with Mg and Ti Liu, et al. developed a cost-effective method to synthesise high-performance cathode materials for sodium-ion batteries (SIBs), replacing expensive cobalt (Co) with magnesium (Mg) and titanium (Ti). The material was synthesized using a solid sintering method. Metal oxides and sodium carbonate were mixed together and then ball-milled at 300 rpm followed by calcination at 900oC. The optimized Co-free cathode, Na0.67Mn0.53Ni0.3Mg0.085Ti0.085O2, demonstrated a reversible specific capacity of 118 mAh/g at a current density of 50 mA/g in the voltage range of 2.0–4.25 V. This capacity surpasses that of its Co-containing counterpart. The inclusion of Mg and Ti also raises the median discharge voltage (from 3.21 V to 3.59 V), increasing the energy density from 325 to 410 Wh/Kg.

A solid-sintering technique has been demonstrated as a cost-effective method for synthesizing Co-free high performance sodium ion battery cathode materials. Replacing Co with Mg and Ti increased the discharge voltage and energy density of the cell.

Academia | P. 207 Source: Z. Liu, J. Wu, J. Zeng, F. Li, C. Peng, D. Xue, M. Zhu, J. Liu

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