2 dimensional WS2 tailored nitrogen-doped carbon nanofiber as a highly pseudocapacitive anode material for lithium-ion battery. (10th May 2018)

• Record Type: Journal Article
• Authors: Yu, Xu; Pei, Chengang; Chen, Wushuang; Feng, Ligang
• Is Part Of: Electrochimica acta. Volume 272(2018)
• Page Start: 119
• Page End: 126
• Publication Date: 2018-05-10
• Subjects: Lithium-ion battery -- WS2 nanosheets -- Nitrogen doped carbon nanofiber -- Heteroatom incorporation; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.03.201
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: To efficiently improve the attractive properties of electrode material for lithium ion batteries (LIBs), the uniform hybridization of 2 Dimensional WS2 nanosheets of nitrogen doped carbon nanofiber (WN-CNF) as a novel anode electrode is synthesized via a facile electrospinning strategy. The well-aligned structure, roughness of surface morphology and chemical composition are characterized by microscopic and spectroscopic analysis. Nitrogen-containing groups and 1 T phase of WS2 in WN-CNF are demonstrated as the electro-active sites to enhance the capacitive performance. Meanwhile, WN-CNF exhibits a highly reversible specific capacity of 814 mAh g −1 at the current density of 100 mA g −1, excellent rate capability of 52% from 100 to 1000 mA g −1 and cyclic stability of 87% after 120 charge/discharge cycles. The high performance can be attributed to the synergistic effects of rough surface, heteroatom N incorporation and hybridization with pseudocapacitive 2D WS2 . Graphical abstract: Highlights: A facile electrospinning strategy is used to synthesize WN-CNF. WN-CNF exhibits a highly reversible specific capacity of 814 mAh g −1 at 100 mA g −1 . Excellent long-term cycling and rate performance are demonstrated. Nitrogen-containing groups and 1 T phase of WS2 in WN-CNF as the electro-active sites.