Stable sodium-sulfur electrochemistry enabled by phosphorus-based complexation
Abstract
Beyond lithium-ion technologies, sodium-sulfur batteries stand out because of their multielectron redox reactions and high theoretical specific energy (1,274 Wh per kg of sulfur). They hold the potential of overcoming the capacity limitation of intercalation-based chemistry (<400 Wh kg −1 ). Major challenges in realizing this potential lie in the formation of undesirable intermediates, irreversible precipitation of solid products, and hence, poor battery cycle life. This work presents a series of sodium phosphorothioate complexes that show superior battery performance at ambient and reduced temperatures. They offer great promise for enabling sodium-based energy storage systems with wide-ranging temperature operability. The coupled experimental characterization and theoretical analysis are valuable for guiding complex synthesis, experimental design, and data interpretation.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 02, 2021
- Source ID
- 10.1073/pnas.2116184118
Entities
People
- Chuanlong Wang
- Edward Matios
- Hai Wang
- Jackson Crane
- Jianmin Luo
- Rui Xu
- Weiyang Li
- Xiaofei Hu
- Yiwen Zhang
- Yue Zhang
Organizations
- Air Force Office of Scientific Research
- Dartmouth College
- National Aeronautics and Space Administration
- National Science Foundation
- Stanford University