We fabricated a Li-S battery with post-treated carbon nanotube (CNT) films which offered better support for sulfur, and investigated the effect of the surface properties and pore structure of the post-treated CNT films on Li-S battery performance. Post-treatments, i.e., acid treatment, unzip process and cetyltrimethylammonium bromide (CTAB) treatment, effectively modified the surface properties and pore structure of the CNT film. The modified pore structure impacted the ability of the CNT films to accommodate the catholyte, resulting in an increase in initial discharge capacity.

Abstract
 1. Introduction
 2. Experimental
  2.1. Post-treatment of the CNT film
  2.2. Fabrication of a catholyte@CNT film electrode
  2.3. Electrochemical measurement
  2.4. Characterization
 3. Results and Discussion
  3.1. Morphological studies of the post-treatedCNT film
  3.2. Analysis of the post-treated CNT films
  3.3. Electrochemical properties of Li-S batterywith the post-treated CNT films
 4. Conclusions
 References

• Hyeonjun Song(Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University)
• Yunjae Hwang(Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University)
• Vimal Tiwari Kumar(Department of Organic Materials and Fiber Engineering, Soongsil University)
• Youngjin Jeong(Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Department of Organic Materials and Fiber Engineering, Soongsil University) Corresponding Author