摘要
Herein, we report on the synthesis and Li-ion storage properties of the 0D–2D nanohybrid consisted of bimetal phosphorus trisulfides nanoneedles(Co_(0.5)Ni_(0.5)PS_3) and graphene nanosheets(denoted as Co_(0.5)Ni_(0.5)PS_3@G). By choosing the Co_(0.5)Ni_(0.5)(OH)_2 nanoneedles as precursor, the Co_(0.5)Ni_(0.5)PS_3 derived by a simple solid-state transformation(SST) process was successfully attached onto the graphene surface.The as-prepared nanohybrids showed a superior cycling stability and rate performance for Li-ion storage.After cycling at a current density of 0.5 A g^(-1) for 500 cycles, the capacity are 456 mAh g^(-1). Particularly,the capacity can reach 302 mAh g^(-1) at a current density of 10 A g^(-1), which is 66.2% of the capacity at0.5 A g^(-1). Even cycling at a current density of 50 A g^(-1), the nanocomposite can still kept a capacity of 153 mAh g^(-1) with a capacity retention of 33.6%.
Herein, we report on the synthesis and Li-ion storage properties of the 0D–2D nanohybrid consisted of bimetal phosphorus trisulfides nanoneedles(Co_(0.5)Ni_(0.5)PS_3) and graphene nanosheets(denoted as Co_(0.5)Ni_(0.5)PS_3@G). By choosing the Co_(0.5)Ni_(0.5)(OH)_2 nanoneedles as precursor, the Co_(0.5)Ni_(0.5)PS_3 derived by a simple solid-state transformation(SST) process was successfully attached onto the graphene surface.The as-prepared nanohybrids showed a superior cycling stability and rate performance for Li-ion storage.After cycling at a current density of 0.5 A g^(-1) for 500 cycles, the capacity are 456 mAh g^(-1). Particularly,the capacity can reach 302 mAh g^(-1) at a current density of 10 A g^(-1), which is 66.2% of the capacity at0.5 A g^(-1). Even cycling at a current density of 50 A g^(-1), the nanocomposite can still kept a capacity of 153 mAh g^(-1) with a capacity retention of 33.6%.
基金
the financial support from Singapore MOE AcRF Tier 1 under grant Nos.RG113/15 and 2016T1-002-065
Singapore EMA project EIRP 12/NRF2015EWTEIRP002-008