期刊
NANO LETTERS
卷 15, 期 8, 页码 5137-5142出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01919
关键词
Oxygenated carbon nitride (OCN); sulfur host; cycle life; lithium/sulfur batteries
类别
资金
- National Natural Science Foundation of China [21303080, 21303129, 21461018, 21433013]
- Natural Science Foundation of Inner Mongolia [2013MS0211, 2013MS0216]
- Open Project from the Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences [13ZS03]
- Cooperative Project of Tongliao-IMUN [SXYB2012027]
- Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region [NJYT-15-B14]
Novel sulfur (5) anchoring materials and the corresponding mechanisms for suppressing capacity fading are urgently needed to advance the performance of Li/S batteries. Here, we designed and synthesized a graphene-like oxygenated carbon nitride (OCN) host material that contains tens of micrometer scaled two-dimensional (2D) rippled sheets, micromesopores, and oxygen heteroatoms. N content can reach as high as 20.49 wt %. A sustainable approach of one-step self-supporting solid-state pyrolysis (OSSP) was developed for the low-cost and large-scale production of OCN. The urea in solid sources not only provides self-supporting atmospheres but also produces graphitic carbon nitride (g-C3N4) working as 2D layered templates. The S/OCN cathode can deliver a high specific capacity of 1407.6 mA h g(-1) at C/20 rate with 84% S utilization and retain improved reversible capacity during long-term cycles at high current density. The increasing micropores, graphitic N, ether, and carboxylic 0 at the large sized OCN sheet favor S utilization and trapping for polysulfides.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据