Herein, a conductive activated cotton textile (ACT) with porous tubular structure was first derived from natural cotton textile to load sulfur, which was further wrapped with partially reduced graphene oxide (ACT/S-rGO) to immobilize lithium polysulfides. Meanwhile, the partially reduced graphene oxide nanosheets could be served as a conductive coating, which further mitigated the poor conductivity of sulfur and enabled fast electron transportation along ACT fibers. Furthermore, a KOH-activated ACT with micropore size distribution was inserted between cathode and separator to mitigate the “shuttle effect” of polysulfides. Finally, the assembled ACT/S-rGO cathode with porous ACT interlayer exhibited an exceptional rate capability and durable cyclic performance (with a well-retained capacity of ~1016 mAh g−1even after 200 cycles). A flexible Li-S cell with ACT/S-rGO as a cathode was also assembled to demonstrate its superior potential as flexible power sources for future wearable electronic devices.
- Bruce, P. G.; Freunberger, S. A.; Hardwick, L. J.; Tarascon, J. M. Li–O2 and Li–S Batteries with High Energy Storage. Nat. Mater. 2011, 11, 172–172.
- Manthiram, A.; Fu, Y.; Su, Y. S. Challenges and Prospects of Lithium-Sulfur Batteries. Acc. Chem. Res. 2013, 46, 1125–1134.
- Gao, Z.; Song, N.; Zhang, Y.; Li, X. Cotton Textile Enabled, All-Solid-State Flexible Supercapacitors. RSC Adv. 2015, 5, 15438–15447.
- Gao, Z.; Song, N.; Li, X. Microstructural Design of Hybrid CoO@NiO and Graphene Nano-Architectures for Flexible High Performance Supercapacitors. J. Mater. Chem. A 2015, 3 (28), 14833–14844.
- Gao, Z.; Song, N.; Zhang, Y.; Li, X. Cotton-Textile-Enabled, Flexible Lithium-Ion Batteries with Enhanced Capacity and Extended Lifespan. Nano Lett. 2015, 15, 8194–8203.
Financial support for this study was provided by the U.S. National Science Foundation (CMMI-1418696 and CMMI-1358673) and the i6 Virginia Innovation Partnership.