Wrinkled Graphene-Reinforced Nickel Sulfide Thin Film as High-Performance Binder-Free Anode for Sodium-Ion Battery

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 775-780
• 页数: 6页
• 语种: 英文

摘要

Sodium-ion batteries (SIBs) recently have received a worldwide attention due to the resource abundance of sodium and similar battery chemistry with lithium-ion batteries (LIBs).However,search for suitable anodes for SIBs still remains a challenge since graphitized carbon,the anode for commercial LIBs,usually exhibits low electrochemical Na-storage activity.In this work,a unique graphene-reinforced Ni3S2 thin film (Ni3S2/G) has been constructed and investigated as a promising anode for SIBs.The Ni3S2 thin film has a thickness of 200-300 nm and is composed of small sized crystals of around 100 nm.The graphene has a wrinkled surface profile which offers three-dimensional networks for electron conductivity and structural reinforcement.The Ni3S2/G thin film exhibits high capacity,excellent cycling stability and good rate capability due to the introduction of wrinkled graphene.Ni3S2/G can deliver a high initial capacity of 791 mAhg-1 at 50 rnAg-1.The capacity can be maintained at 563 mAhg-1 after 110 cycles.This work provides a unique design for high-performance SIBs anodes.