Reaction mechanism of all-solid-state lithium–sulfur battery with two-dimensional mesoporous carbon electrodes

• Published in: Journal of power sources Vol. 243; pp. 60 - 64
• Main Authors: Nagao, Miki, Imade, Yuki, Narisawa, Haruto, Watanabe, Ryota, Yokoi, Toshiyuki, Tatsumi, Takashi, Kanno, Ryoji
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2013; Elsevier
• Subjects: All-solid-state battery; Applied sciences; CMK-3; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Lithium–Sulfur battery; Mesoporous carbon; Small-angle X-ray scattering; All-solid-state battery; CMK-3; Mesoporous carbon; Lithium–Sulfur battery; Small-angle X-ray scattering; Carbon electrode; Secondary cell; Two dimensional model; Small angle X ray scattering; Carbon; Porous material; Modeling; Mesoporosity; Lithium―Sulfur battery; Lithium sulfur batteries; Solid state; Reaction mechanism; Physicochemical properties
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.05.037

The reaction mechanism of all-solid-state lithium–sulfur batteries was studied by small- and wide-angle X-ray scattering. The results revealed that sulfur deposited in the electrode framework has a random distribution on the carbon wall of the highly ordered mesoporous carbon, CMK-3. Heat treatment complicated carbon surfaces with attached sulfur and improved the reversible charge–discharge reaction. Two Li2S phases formed during the discharge reaction; one of them participates in the reversible battery reactions. •Sulfur/CMK-3 composite cathode for all-solid-state battery.•Structure and reaction mechanism of the sulfur/carbon composites were determined.•Sulfur deposited randomly in the mesopore of the carbon by gas-phase mixing.•Carbon stacking changed during charge–discharge reaction.•One of two Li2S modifications appeared during discharge participated in the reversible reaction.