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Corresponding Author

Yan-hong TIAN(tianyh@mail.buct.edu.cn)

Abstract

The composite materials contained high modulus carbon fiber (HMCF) were successfully prepared by employing a ball-milling process based on the coating treatment of polyethylene glycol (PEG), and their structures and morphologies were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) techniques．The influences of PEG content on sulfur cathode capacity, cycle stability and rate performance were systematically studied. It was found that by the pre-coating of PEG, the cathode exhibited the high initial discharge specific capacity of 1312.5 mAh•g-1 at a current rate of 0.2C, and the reversible discharge capacity of 650 mAh•g-1 was obtained after 50 cycles at a current rate of 200 mA•g-1, showing the remarkably improved cycling stability.

Graphical Abstract

Keywords

Lithium-sulfur battery, sulfur cathode, high modulus carbon fiber, coated, polyethyl-ene glycol

Publication Date

2017-12-28

Online Available Date

2016-12-09

Revised Date

2016-11-15

Received Date

2016-09-28

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