Research output: Contribution to journal › Article › peer-review
Creation of nanosized holes in graphene planes for improvement of rate capability of lithium-ion batteries. / Bulusheva, L. G.; Stolyarova, S. G.; Chuvilin, A. L. et al.
In: Nanotechnology, Vol. 29, No. 13, 134001, 12.02.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Creation of nanosized holes in graphene planes for improvement of rate capability of lithium-ion batteries
AU - Bulusheva, L. G.
AU - Stolyarova, S. G.
AU - Chuvilin, A. L.
AU - Shubin, Yu V.
AU - Asanov, I. P.
AU - Sorokin, A. M.
AU - Mel'Gunov, M. S.
AU - Zhang, Su
AU - Dong, Yue
AU - Chen, Xiaohong
AU - Song, Huaihe
AU - Okotrub, A. V.
PY - 2018/2/12
Y1 - 2018/2/12
N2 - 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 intercalation-deintercalation 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.
AB - 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 intercalation-deintercalation 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.
KW - holey graphene
KW - graphite oxide
KW - hot concentrated H2SO4 treatment
KW - Li-ion battery
KW - POROUS GRAPHENE
KW - GRAPHITE OXIDE
KW - SULFURIC-ACID
KW - ENERGY-STORAGE
KW - PERFORMANCE
KW - SPECTROSCOPY
KW - DEFECTS
KW - ADSORPTION
KW - ELECTRODES
KW - CHEMISTRY
UR - http://www.scopus.com/inward/record.url?scp=85042278146&partnerID=8YFLogxK
U2 - 10.1088/1361-6528/aaa99f
DO - 10.1088/1361-6528/aaa99f
M3 - Article
C2 - 29355834
AN - SCOPUS:85042278146
VL - 29
JO - Nanotechnology
JF - Nanotechnology
SN - 0957-4484
IS - 13
M1 - 134001
ER -
ID: 10427519