Organic electrolytes, thermal behavior

The thermal behavior of Li, Ni02 in relation to safety is another key factor when in considering materials for lithium-ion batteries. LiNi02 is stable even when it is heated with an organic electrolyte. However, partially or fully oxidized LiNi02 is quite active toward organic electrolyte oxidation and this reaction is exothermic. 

Kang, J. H., S. H. Jayaram, J. Rawlins, and J. Wen. 2014. Characterization of thermal behaviors of electrochemical double layer capacitors (EDLCs) with aqueous and organic electrolytes. Electrochimica Acta 144 1-11. 

Generally, the cross-linked PEO gel electrolytes have good mechanical strength, thermal behavior, and electrochemical performance. For example, their exothermic peak (340°C) is higher than that of common organic electrolytes (266°C), and their ionic conductivity at 20°C can be as high as 2.4 x 10-3 S/cm. 

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