作者
Ruiqing Liu, Wenhui Liu, Yali Bu, Weiwei Yang, Cheng Wang, Cameron Priest, Zhiwei Liu, Yizhou Wang, Jianyu Chen, Yunhui Wang, Jie Cheng, Xiujing Lin, Xiaomiao Feng, Gang Wu, Yanwen Ma, Wei Huang
发表日期
2020/11/30
期刊
ACS nano
卷号
14
期号
12
页码范围
17308-17320
出版商
American Chemical Society
简介
Improving the sulfur loading in cathodes is a significant challenge for practical lithium–sulfur batteries. Although carbonaceous sulfur hosts can achieve higher sulfur content and loading, the low tap densities of carbonaceous materials lead to low volumetric energy densities, restricting practical application. Here, conductive porous laminated vanadium nitride (VN) as a carbon-free sulfur host has been successfully developed to construct high tap density, high sulfur loading, and high energy density sulfur electrodes. The laminated stacking multiscale VN featuring interconnected holes possesses high storage space for sulfur loading, achieving high sulfur loading and utilization. VN@S materials’ sulfur content and tap density can achieve 80 wt % and 1.17 g cm–3, respectively. At the sulfur loading of 1.0 mg cm–2, the VN@S cathode reaches the reversible capacity of 790 mAh g–1 at 1 C after 200 cycles and 145.2 …
引用总数