Probing Thermal and Chemical Stability of NaxNi1/3Fe1/3Mn1/3O2 Cathode Material toward Safe Sodium-Ion Batteries

By Yingying Xie, Gui‐Liang Xu, Haiying Che, Hong Wang, Ke Yang, Xinrong Yang, F. Guo, Yang Ren, Zonghai Chen, K. Amine and 1 more. Chemistry of Materials, 2018

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Because of the low cost and high abundance of sodium, room-temperature sodium-ion batteries have recently been considered as an alternative power source to lithium-ion batteries. In contrast to the electrochemical performance of the batteries, safety has been paid much less attention, but safety is a critical consideration because sodium-ion batteries are intended for large-scale electrochemical energy storage applications. Herein, we have reported a NaNi1/3Fe1/3Mn1/3O2/hard carbon full cell with a good cycling performance and high Coulombic efficiency. The energy density of this pouch cell is close to 95 Wh/kg, and the capacity retention of the NFM full cell attained at 92.6% after 100 cycle numbers. Moreover, we have further used accelerating rate calorimetry, scanning electron microscopy, and operando synchrotron high-energy X-ray diffraction to investigate the thermal/chemical stability of charged NaxNi1/3Fe1/3Mn1/3O2 cathode material at both cell and component level. It is found that the thermal deco...

Subfields: Electrical and Electronic Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/1ed7e39ce76db966465ef558a287aaec43c47fdf