Insight into the Effect of Iodine Doping Soft Carbon and Iodine Functional Separator for Lithium‐Sulfur Batteries
(2022) Batteries & Supercaps — Vol. 5, n° 8 (2022)
Files
BatteriesSupercaps-2022-Zhang-InsightintotheEffectofIodineDopingSoftCarbonandIodineFunctionalSeparator.pdf
Open Access - Adobe PDF
- 4.82 MB
Details
- Authors
Chen, Xiaohua 
- Abstract
- Doping carbonaceous materials are regarded as prospective cathode candidates for high-performance lithium-sulfur (Li−S) batteries. In this study, we construct a dual functional modification system, including iodine-doped soft carbon (I-SC) and iodine functional separator for Li−S batteries. The formation of C−I bonds in the carbon skeleton increases the carbon interlayer spacing and displays a powerful chemical adsorption ability and electrocatalytic activity for polysulfide conversion. In addition, semi-hollow micro-rods-structure soft carbon not only accommodates the volume expansion of sulfur, but also provides a continuous conductive network to transport Li+ and electrons over cycling. Furthermore, by assisting with polyiodide (e. g., I3− and I5−) modified separator, the polysulfide migration can be further controlled, resulting in a high capacity of 956 mAh g−1 at 0.2 C after 300 cycles. This work represents the importance of I-doping and provides the potential of soft carbon for low-cost and scalable fabrication of energy storage systems.
- Affiliations
Citations
Zhang, Y., Pal, S., Yang, Y., Huang, C., Wang, J., Apostol, P., Liu, Z., Hu, A., Vlad, A., & Chen, X. (2022). Insight into the Effect of Iodine Doping Soft Carbon and Iodine Functional Separator for Lithium‐Sulfur Batteries. Batteries & Supercaps, 5(8). https://doi.org/10.1002/batt.202200124 (Original work published 2022)