Sökning: L773:2050 7488
> Populärvet., debatt m.m. >
3-D binder-free gra...
3-D binder-free graphene foam as cathode for high capacity Li-O2 batteries
-
- Liu, Chenjuan, 1988- (författare)
- Uppsala universitet,Strukturkemi,Ångström Advanced Battery Centre
-
- Younesi, Reza (författare)
- Uppsala universitet,Strukturkemi
-
- Tai, Cheuk-Wai (författare)
- Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden
-
visa fler...
-
- Valvo, Mario (författare)
- Uppsala universitet,Strukturkemi
-
- Edström, Kristina (författare)
- Uppsala universitet,Strukturkemi
-
- Gustafsson, Torbjörn (författare)
- Uppsala universitet,Strukturkemi
-
- Zhu, Jiefang (författare)
- Uppsala universitet,Strukturkemi,Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China
-
visa färre...
-
(creator_code:org_t)
- 2016
- 2016
- Engelska.
-
Ingår i: Journal of Materials Chemistry A. - 2050-7488. ; 4:25, s. 9767-9773
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://uu.diva-port... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- To provide energy densities higher than those of conventional Li-ion batteries, a Li–O2 battery requires a cathode with high surface area to host large amounts of discharge product Li2O2. Therefore, reversible formation of discharge products needs to be investigated in Li–O2 cells containing high surface area cathodes. In this study, a binder-free oxygen electrode consisting of a 3-D graphene structure on aluminum foam, with a high defect level (ID/IG = 1.38), was directly used as the oxygen electrode in Li– O2 batteries, delivering a high capacity of about 9 *104 mA h g-1 (based on the weight of graphene) at the first full discharge using a current density of 100 mA ggraphene-1 . This performance is attributed to the 3-D porous structure of graphene foam providing both an abundance of available space for the deposition of discharge products and a high density of reactive sites for Li–O2 reactions. Furthermore, the formation of discharge products with different morphologies and their decomposition upon charge were observed by SEM. Some nanoscaled LiOH particles embedded in the toroidal Li2O2 were detected by XRD and visualized by TEM. The amount of Li2O2 formed at the end of discharge was revealed by a titration method combined with UV-Vis spectroscopy analysis.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Kemi med inriktning mot materialkemi
- Chemistry with specialization in Materials Chemistry
Publikations- och innehållstyp
- pop (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas