Anionic redox in a-(Mo3S11)n polymer cathode for all-solid-state Li-ion battery
Journal
Electrochimica Acta
Journal Volume
332
Start Page
135218
ISSN
00134686
Date Issued
2020
Author(s)
Truong, Quang Duc
Yin, Lichang
Nguyen, Duc N.
Gambe, Yoshiyuki
Nayuki, Keiichiro
Sasaki, Yoshikazu
Kobayashi, Hiroaki
Saito, Riichiro
Tran, Phong Dinh
Abstract
Lithium-ion battery that consists of a cathode made of (Mo3S11)n polymer and an anode of Li metal exhibits a high gravimetric-capacity, 673.3 mAh g?1. A flexible structure of the (Mo3S11) n polymer enables consecutive redox reactions of the S2 2? dimer and the Mo atoms. According to X-ray absorption near-edge spectroscopy, X-ray photoelectron spectroscopy and Raman spectroscopy, the chemical bonds of Mo–S and S–S in the polymer elongate by accepting electrons up to 16, while the Mo–Mo bond does not change much during the redox reactions. Although the polymer cathode is put in a solid-state electrolyte, the S2 2? dimer that is redoxed by the reaction of S2 2? + 2e? → 2S2? forms Li–S–Li bonds, which is an origin of the high capacity of the battery. The redox reactions in the (LixMo3S11)n polymer cathode is theoretically confirmed by first principles calculation.
Subjects
Amorphous Metal-polysulfides
Anionic Redox
First Principles Calculation
Lithium Ion Battery
Bond Strength (chemical)
Calculations
Cathodes
Dimers
Flexible Structures
Ions
Redox Reactions
Solid Electrolytes
Solid-state Batteries
X Ray Absorption
X Ray Photoelectron Spectroscopy
Amorphous Metals
Anionic Redox
First-principles Calculation
Gravimetric Capacity
Polymer Cathodes
Solid-state Electrolyte
X-ray Absorption Near Edge Spectroscopy
X-ray Photoelectrons
Lithium-ion Batteries
SDGs
Publisher
Elsevier Ltd
Type
journal article