The possibility to avoid thermal runaway (TR) is also illustrated during polarization of the cells at
2.65 V. After 320 h, a conventional cell has C/4 current (trend to TR), while the cells with composite
coating sustain low (C/26) constant current for long period of time (at least 650 h). The cycle life test
indicates stable operation of the cells with coated separator, while the conventional cell reaches high
recombinant current and thus, it is susceptible to thermal runaway phenomena.