Fabrication of petal-like Ni3S2 nanosheets on 3D carbon nanotube foams as high-performance anode materials for Li-ion batteries

摘要

We have successfully fabricated petal-like Ni3S2 nanosheets on three-dimensional carbon nanotube foams (Ni3S2@3D-CNTF) via a simple one-pot solvothermal method. The 3D-CNTFs were firstly prepared by reducing greenhouse gas of CO2 with an eco-friendly self-assembly technology. The electrochemical performances of obtained Ni3S2@3D-CNTF composite were evaluated as anode materials for Li-ion batteries, which demonstrates a high reversible capacity of 968.2 mAh g(-1) at 0.2 A g(-1), good rate performance of 524.1 mAh g(-1) at 8 A g(-1), and long life cycling stability of 93.6% capacity retention after 900 cycles at 4 A g(-1). The excellent rate properties and cycling stability can be ascribed to the 3D porous network structure of carbon and abundant active sites of nanosized Ni3S2 sheets. All these superior electrochemical characteristics indicate that the composite of Ni3S2@3D-CNTF can be considered as a competitive participant for high-performing negative electrode materials for Li-ion batteries. (c) 2019 Elsevier Ltd. All rights reserved.