Journal article
Enhancing Chemical Interaction of Polysulfide and Carbon through Synergetic Nitrogen and Phosphorus Doping
ACS sustainable chemistry & engineering, Vol.8(2), pp.806-813
01/21/2020
Abstract
The shuttling effect of the polysulfide (PS) is the most detrimental factor that causes capacity fading of Li–S batteries. By substituting carbon atoms with heteroatoms, the host materials can provide a chemical interaction with PS to trap it within the electrochemically active range of the cathode. In this study, first-principles-based calculations identify the most stable nitrogen (N) and phosphorus (P) codoped atomic structures and their corresponding adsorption energy toward different PS species. Based on the simulated predictions, we introduce a glucosamine-derived carbon nanotube aerogel (CNA) with a secondary dopant of P during the synergetic polymerization and carbonization process. The N–P codoped CNA and S composite (NPCNA-S) renders a highly stable performance even at a sulfur loading of 3.5 mg cm–2. The specific capacity is >900 mAh g–1 and the stabilized capacity retention is >70% over 450 cycles at 0.2 C rate (1 C = 1675 mA g–1).
Metrics
1 Record Views
Details
- Title
- Enhancing Chemical Interaction of Polysulfide and Carbon through Synergetic Nitrogen and Phosphorus Doping
- Creators
- Junhua Song - Washington State UniversityJianming Zheng - Pacific Northwest National LaboratoryRenqin Zhang - Washington State UniversityShaofang Fu - Washington State UniversityChengzhou Zhu - Washington State UniversityShuo Feng - Washington State UniversityJean-Sabin McEwen - Institute for Integrated CatalysisDan Du - Washington State UniversityXiaolin Li - Pacific Northwest National LaboratoryYuehe Lin - Washington State University
- Publication Details
- ACS sustainable chemistry & engineering, Vol.8(2), pp.806-813
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- American Chemical Society
- Number of pages
- 8
- Identifiers
- 99901227840001842
- Language
- English
- Resource Type
- Journal article