Electrophoretically Deposited α-Fe2O3 and TiO2 Composite Anchored on rGO with Excellent Cycle Performance as Anode for Lithium Ion Batteries
Solid State Ionics 2018
Kaspars Kaprāns, Jānis Mateuss, Anna Dorondo, Gunārs Bajārs, Gints Kučinskis, Pēteris Lesničenoks, Jānis Kleperis

Two nanostructured oxides, α-Fe2O3 and TiO2 with a particle diameters 50 nm and 21 nm, were mixed with graphene oxide (GO). Composite thin films on a stainless steel substrate were obtained by electrophoretic deposition (EPD) procedure from water suspensions: α-Fe2O3/GO, TiO2/GO and α-Fe2O3/TiO2/GO. Subsequently reduction of as-prepared thin films was performed. Thicknesses of acquired films were evaluated in the range of 2–6 μm. Structure and morphology were investigated as well as electrochemical properties of all samples were studied. The results revealed that α-Fe2O3/TiO2/rGO (in this article denoted as FTGO) exhibited the specific discharge capacity of 790 mAh·g−1 after 150 cycles at the current density 100 mA·g−1. The improved electrochemical properties were obtained due to rGO uniform dispersion within inter-space of α-Fe2O3 and TiO2 as well as synergic effect between both metal and graphene oxides. Additionally, rGO not only has excellent electron conductivity, but also can alleviate the solid-electrolyte interphase film formation. Prepared composite exhibit excellent cycle performance, coulombic efficiency (66%) and rate capability. Therefore, FTGO ternary structure material has perspective application as lithium ion battery anode in comparison with a α-Fe2O3/rGO and TiO2/rGO composites. The results showed obtained composite is a promising anode material for high energy and long cycle life lithium ion batteries.


Atslēgas vārdi
Lithium ion battery; Graphene oxide; Electrophoretic deposition; Multiple element strategy
DOI
10.1016/j.ssi.2018.01.042
Hipersaite
https://www.sciencedirect.com/science/article/pii/S0167273817307634

Kaprāns, K., Mateuss, J., Dorondo, A., Bajārs, G., Kučinskis, G., Lesničenoks, P., Kleperis, J. Electrophoretically Deposited α-Fe2O3 and TiO2 Composite Anchored on rGO with Excellent Cycle Performance as Anode for Lithium Ion Batteries. Solid State Ionics, 2018, Vol. 309, No. 1, 1.-6.lpp. Pieejams: doi:10.1016/j.ssi.2018.01.042

Publikācijas valoda
English (en)
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