Unveiling the enhancing mechanism of cycling stability of Li1.2Mn0.54Ni0.13Co0.13O2-xFx cathode materials

Facile synthesis of sulfide Bi13S18I2 as a promising anode material for a lithium-ion battery

“…3f shows the formation of the second semicircle, which originates from the formation of SEI lm on the surface of the cycled sample, leading to the increased interface resistance. 31 The results conrm that N-doped graphene not only maintains the high conductivity of the BSI composites, but also greatly improves the fast electron transfer during electrochemical lithium insertion/ extraction and effectively suppresses the volume expansion during charge/discharge, thus signicantly improving the electrochemical performance of the graphene/BSI composite. Meanwhile, diffusion kinetics of lithium ions in electrodes can be obtained according to the Warburg factor (r) related to the slope of the linear ttings in the low-frequency region.…”