Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61022
Title: A high-level N-doped porous carbon nanowire modified separator for long-life lithium-sulfur batteries
Authors: Zhou, X
Liao, Q
Tang, J
Bai, T
Chen, F
Yang, J
Keywords: Lithium-sulfur batteries
Modified separator
N-doped
Porous carbon nanowire
Issue Date: 2016
Publisher: Elsevier
Source: Journal of electroanalytical chemistry, 2016, v. 768, p. 55-61 How to cite?
Journal: Journal of electroanalytical chemistry 
Abstract: Lithium-sulfur (Li-S) batteries are an attractive candidate for the next generation energy storage systems. However, the practical use of Li-S batteries is hindered by poor cycle life and low Coulombic efficiency, which are induced by shuttle effect. Modifying the properties of a separator is an effective way to inhibit the shuttle effect. However, only physical interactions of common carbon materials are not enough to confine lithium polysulfides. In this paper, a porous carbon nanowire (N-PCNW) is designed to modify the separator. The N-PCNW with high N-doped level (7.12 wt%) not only possesses excellent electron conductivity, but also traps the soluble polysulfides effectively with both physical and chemical interactions. With the N-PCNW modified separator, the pure sulfur cathode exhibits enhanced electrochemical performance, showing a high initial discharge capacity of 1430 mA h g- 1 at 0.2 C (1 C = 1675 mA h g- 1) and good long-term cycling stability at 0.5 C with 0.08% capacity fading per cycle. This design is easy and efficient, providing a great promise for the pratical use of Li-S batteries.
URI: http://hdl.handle.net/10397/61022
ISSN: 1572-6657
DOI: 10.1016/j.jelechem.2016.02.037
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