Graphene-supported bimetal phosphorus trisulfides as novel 0D – 2D nanohybrid for high rate Li-ion storage

• Main Authors: Du, Cheng-Feng, Liang, Qinghua, Yan, Qingyu
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Materials; Metal Phosphorus Trisulfides; Nanohybrid
• Online Access: https://hdl.handle.net/10356/140475
• Institution: Nanyang Technological University

Herein, we report on the synthesis and Li-ion storage properties of the 0D–2D nanohybrid consisted of bimetal phosphorus trisulfides nanoneedles (Co0.5Ni0.5PS3) and graphene nanosheets (denoted as Co0.5Ni0.5PS3@G). By choosing the Co0.5Ni0.5(OH)2 nanoneedles as precursor, the Co0.5Ni0.5PS3 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 mA h 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 at 0.5 A g−1. Even cycling at a current density of 50 A g−1, the nanocomposite can still kept a capacity of 153 mA h g−1 with a capacity retention of 33.6%.