A free-standing reduced graphene oxide aerogel as supporting electrode in a fluorine-free Li2S8 catholyte Li-S battery

Cavallo, Carmen, 1986 (author): Chalmers tekniska högskola,Chalmers University of Technology

Agostini, Marco, 1987 (author): Chalmers tekniska högskola,Chalmers University of Technology

Abdelhamid, Muhammad, 1987 (author): Commonwealth Scientific and Industrial Research Organisation (CSIRO)

Matic, Aleksandar, 1968 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

Elsevier BV, 2019
2019
English.
In: Journal of Power Sources. - : Elsevier BV. - 0378-7753. ; 416, s. 111-117

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Abstract Subject headings

We report on a novel, simple, and environmentally benign synthesis route for a free-standing reduced graphene oxide (r-GO) aerogel and its application as supporting electrode for the electrochemical redox reaction of sulphur in a catholyte-based lithium-sulphur battery. A mesoporous matrix is formed by a layers of r-GO, providing sites for electrochemical reactions and a highly conducting pathway for electrons. The highly porous structure is easily infiltrated by a catholyte solution providing a homogeneous distribution of the sulphur active material in the conductive graphene matrix and ensuring efficient electrochemical reactions. This is demonstrated by a high capacity, 3.4 mAh cm−2, at high mass loading, 3.2 mg cm−2 of sulphur in the cathode and in total the sulphur loading in the Li-S cell is even double (6.4 mg cm−2). Additionally, the presence of oxygen groups in the r-GO aerogel structure stabilizes the cycling performance and the Li-S cell with the fluorine free catholyte shows a capacity retention of 85% after 350 cycles.

NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)

By the author/editor: Cavallo, Carmen, ...; Agostini, Marco, ...; Genders, James P ...; Abdelhamid, Muha ...; Matic, Aleksanda ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Inorganic Chemis ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Materials Chemis ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Other Chemical E ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

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