The effect of P VP (Poly vinylpyrrolidone) on the electroche mical synthesis of Sn nanoparticl es for lit hium ion batteries

Lithium ion secondary batteries have the highest energy density in commercialized b atteries. The inc reasing de mand for higher capac ity batteries in electro nics devic es has prom oted an intensiv e research effort to develop new materials suitable for new hi gh energy capacity lithium batteries. For the anode materials, there is a n increasin g interest in alternativ e anode materials for rech argeable lithium batteries becaus e the graphite, which i s used cur ently in commercialized li thium batteries, has o nly ۱۰% (۳۷۲ mAh/g) of the the oretical cap acity of metalli c lithium (۳ ۸۶۰ mAh/ g). Many al loy anode materials have been studied to o vercome the limi ted capacity of graphite [۱]. For e xample, tin -based materials have been considered as alternative anode materials f or the high er energy density and they have almost doubled the capacity of graphit e [۱]. Alth ough tin have much higher capacities than that of graphite, they underg o severe volume expan sion/contra ction and p ulverization. These li mit the life-cycle ofthe ano de [۲-۴]. In this work, to impr ove the p erformance of tin ano de, nano-sized tin electro des were prepared using electrodeposition in the presence of PVP.

کلیدواژه ها:

lithiu m ion batte ry ، nanoparticle ، pulse electrodep osition