Creation of Nanosized Holes in Graphene Planes for Improvement of Rate Capability of Lithium-Ion Batteries
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Nanotechnology
ISSN: 0957-4484
, E-ISSN: 1361-6528
|
| Output data |
Year: 2018,
Volume: 29,
Article number
: 134001,
Pages count
: 9
DOI:
10.1088/1361-6528/aaa99f
|
| Tags |
holey graphene, graphite oxide, hot concentrated H2SO4 treatment, Li-ion battery |
| Authors |
Bulusheva L.G.
1,2
,
Stolyarova S.G.
1
,
Chuvilin A.L.
3,4
,
Shubin Yu.V.
1,2
,
Asanov I.P.
1,2
,
Sorokin A.M.
5
,
Mel’gunov M.S.
2,5
,
Zhang Su
6
,
Dong Yue
6
,
Chen Xiaohong
6
,
Song Huaihe
6
,
Okotrub A.V.
1,2
|
| Affiliations |
| 1 |
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
|
| 2 |
Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia
|
| 3 |
CIC nanoGUNE Consolider, E-20018 San Sebastian, Spain
|
| 4 |
IKERBASQUE, Basque Foundation for Science, E-48013 Bilbao, Spain
|
| 5 |
Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, 5 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia
|
| 6 |
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
16-13-00016
|
Holes with an average size of 2–5 nm have been created in graphene layers by heating of graphite oxide (GO) in concentrated sulfuric acid followed by annealing in an argon flow. The hot mineral acid acts simultaneously as a defunctionalizing and etching agent, removing a part of oxygen-containing groups and lattice carbon atoms from the layers. Annealing of the holey reduced GO at 800 °C–1000 °C causes a decrease of the content of residual oxygen and the interlayer spacing thus producing thin compact stacks from holey graphene layers. Electrochemical tests of the obtained materials in half-cells showed that the removal of oxygen and creation of basal holes lowers the capacity loss in the first cycle and facilitates intercalationdeintercalation of lithium ions. This was attributed to minimization of electrolyte decomposition reactions, easier desolvation of lithium ions near the hole boundaries and appearance of multiple entrances for the naked ions into graphene stacks.