Abstract
A S/CNTs/La2O3 composite with microsphere morphology was prepared by facile one-pot spray drying method. La2O3 nanoplates are anchored tightly in interlaced CNTs framework to form a highly efficient sulfur host. Benefiting from synergistic effects of nonpolar CNTs and polar La2O3 in both enhancing conductivity and capturing polysulfide by physical and chemical adsorptions, the novel S/CNTs/La2O3 composite exhibited superior electrochemical properties in lithium/sulfur battery. The S/CNTs/La2O3 cathode exhibited initial reversible discharge capacity of 1251 mAh g−1 and maintained 1011 mAh g−1 capacity after 100 cycles at 0.1 C. The capacity decay rate of S/CNTs/La2O3 cathode was as low as 0.067% per cycle over 300 cycles at 1.0 C, showing good long-cycling stability.
Original language | English |
---|---|
Article number | 127690 |
Journal | Materials Letters |
Volume | 270 |
DOIs | |
Publication status | Published - Jul 1 2020 |
Keywords
- Carbon nanotubes
- Chemical adsorption
- Composite materials
- Lithium/sulfur batteries
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering