Zou, JizhaoNiu, YuanTu, WenxuanZhang, QiYao, YuechaoZeng, Shao-ZhongLan, TongbinWu, HongliangZeng, XierongZeng, Xierong2020-01-102020-01-102019-10-14Zou J, Niu Y, Tu W, et al., (2019) Optimized synthesis of ultrahigh-surface-area and oxygen-doped carbon nanobelts for high cycle-stability lithium-sulfur batteries. Journal of The Electrochemical Society, Volume 166, Issue 14, January 2019, pp. A3464-A34730013-4651https://doi.org/10.1149/2.1111914jeshttps://dspace.lib.cranfield.ac.uk/handle/1826/14906Hierarchical clews of carbon nanobelts (CsCNBs) with ultrahigh specific surface area (2300 m2 g−1) and large pore volume (up to 1.29 cm3 g−1) has been successfully fabricated through carbonization and KOH activation of phenolic resin based nanobelts. The product possesses hierarchically porous structure, three-dimensional conductive network framework, and polar oxygen-rich groups, which are very befitting to load sulfur leading to excellent cycling stability of lithium-sulfur batteries. The composites of CsCNBs/sulfur exhibit an ultrahigh initial discharge capacity of 1245 mA h g−1 and ultralow capacity decay rate as low as 0.162% per cycle after 200 cycles at 0.1 C. Even at high current rate of 4 C, the cells still display a high initial discharge capacity (621 mA h g−1) and ultralow capacity decay rate (only 0.039% per cycle) after 1000 cycles. These encouraging results indicate that polar oxygen-containing functional groups are important for improving the electrochemical performance of carbons. The oxygen-doped carbon nanobelts have excellent energy storage potential in the field of energy storage.enAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/carbon nanobeltsLi-S batteriesArticle