期刊
NANO-MICRO LETTERS
卷 11, 期 1, 页码 -出版社
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-019-0295-8
关键词
Atomic layer deposition; Nickel; N-doped carbon nanospheres; Sulfur cathode; Lithium-sulfur batteries
资金
- National Natural Science Foundation of China [51772272, 51728204]
- Fundamental Research Funds for the Central Universities [2018QNA4011]
- Science and Technology Program of Guangdong Province of China [2016A010104020]
- Pearl River S&T Nova Program of Guangzhou [201610010116]
- Qianjiang Talents Plan D [QJD1602029]
- Startup Foundation for Hundred-Talent Program of Zhejiang University
Rational design of hybrid carbon host with high electrical conductivity and strong adsorption toward soluble lithium polysulfides is the main challenge for achieving high-performance lithium-sulfur batteries (LSBs). Herein, novel binder-free Ni@N-doped carbon nanospheres (N-CNSs) films as sulfur host are firstly synthesized via a facile combined hydrothermal-atomic layer deposition method. The cross-linked multilayer N-CNSs films can effectively enhance the electrical conductivity of electrode and provide physical blocking dams toward the soluble long-chain polysulfides. Moreover, the doped N heteroatoms and superficial NiO layer on Ni layer can work synergistically to suppress the shuttle of lithium polysulfides by effective chemical interaction/adsorption. In virtue of the unique composite architecture and reinforced dual physical and chemical adsorption to the soluble polysulfides, the obtained Ni@N-CNSs/S electrode is demonstrated with enhanced rate performance (816 mAh g(-1) at 2 C) and excellent long cycling life (87% after 200 cycles at 0.1 C), much better than N-CNSs/S electrode and other carbon/S counterparts. Our proposed design strategy offers a promising prospect for construction of advanced sulfur cathodes for applications in LSBs and other energy storage systems.
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