A functional binder-sulfonated poly(ether ether ketone) for sulfur cathode of Li-S batteries

作者：Cheng, Meng; Li, Longyan; Chen, Yanxiao^*; Guo, Xiaodong; Zhong, Benhe

来源：RSC Advances, 2016, 6(81): 77937-77943.

DOI：10.1039/c6ra16171e

• PROTON-EXCHANGE MEMBRANES
• FUEL-CELL APPLICATIONS
• LITHIUM/SULFUR BATTERIES
• PERFORMANCE
• ELECTRODE
• POLYMER
• COMPOSITE
• AGENT

Sulfonated poly(ether ether ketone) (SPEEK) with strong electronegativity and adhesion ability of S/C compounds was prepared by a homogeneous reaction as the binder for the sulfur cathode of Li-S batteries compared to the conventional polyvinylidene fluoride (PVDF) binder. The binder and its applications to lithium sulfur batteries were characterized by proton nuclear magnetic resonance (H-1 NMR) spectroscopy, Fourier transformation infrared spectroscopy (FT-IR), thermogravimetry (TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), cyclic voltammogram (CV) and charge-discharge tests. The results show that this functional binder exhibits promising characteristics for lithium sulfur batteries with a capacity of 552.6 mA h g(-1) at a current density of 1600 mA g(-1) and 268.5 mA h g(-1) at 1000 mA g(-1) after 300 cycles.

• 出版日期2016
• 单位南京信息工程大学; 四川大学