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Si/Ti2O3/Reduced Graphene Oxide Nanocomposite Anodes for Lithium-Ion Batteries with Highly Enhanced Cyclic Stability.
ACS Appl Mater Interfaces 2015; 7(33):18483-90AA

Abstract

Silicon (Si) has attracted tremendous attention as a high-capacity anode material for next generation Li-ion batteries (LIBs); unfortunately, it suffers from poor cyclic stability due to excessive volume expansion and reduced electrical conductivity after repeated cycles. To circumvent these issues, we propose that Si can be complexed with electrically conductive Ti2O3 to significantly enhance the reversible capacity and cyclic stability of Si-based anodes. We prepared a ternary nanocomposite of Si/Ti2O3/reduced graphene oxide (rGO) using mechanical blending and subsequent thermal reduction of the Si, TiO2 nanoparticles, and rGO nanosheets. As a result, the obtained ternary nanocomposite exhibited a specific capacity of 985 mAh/g and a Coulombic efficiency of 98.4% after 100 cycles at a current density of 100 mA/g. Furthermore, these ternary nanocomposite anodes exhibited outstanding rate capability characteristics, even with an increased current density of 10 A/g. This excellent electrochemical performance can be ascribed to the improved electron and ion transport provided by the Ti2O3 phase within the Si domains and the structurally reinforced conductive framework comprised of the rGO nanosheets. Therefore, it is expected that our approach can also be applied to other anode materials to enable large reversible capacity, excellent cyclic stability, and good rate capability for high-performance LIBs.

Authors+Show Affiliations

No affiliation info availableNo affiliation info availableAdvanced Energy Materials Processing Laboratory, Center for Energy Convergence Research, Korea Institute of Science and Technology (KIST) , Seoul 130-650, Republic of Korea.No affiliation info availableNo affiliation info availableSchool of Chemical Engineering and Materials Science, Chung-Ang University , Seoul 156-756, Republic of Korea.Advanced Energy Materials Processing Laboratory, Center for Energy Convergence Research, Korea Institute of Science and Technology (KIST) , Seoul 130-650, Republic of Korea.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26244752

Citation

Park, A Reum, et al. "Si/Ti2O3/Reduced Graphene Oxide Nanocomposite Anodes for Lithium-Ion Batteries With Highly Enhanced Cyclic Stability." ACS Applied Materials & Interfaces, vol. 7, no. 33, 2015, pp. 18483-90.
Park AR, Son DY, Kim JS, et al. Si/Ti2O3/Reduced Graphene Oxide Nanocomposite Anodes for Lithium-Ion Batteries with Highly Enhanced Cyclic Stability. ACS Appl Mater Interfaces. 2015;7(33):18483-90.
Park, A. R., Son, D. Y., Kim, J. S., Lee, J. Y., Park, N. G., Park, J., ... Yoo, P. J. (2015). Si/Ti2O3/Reduced Graphene Oxide Nanocomposite Anodes for Lithium-Ion Batteries with Highly Enhanced Cyclic Stability. ACS Applied Materials & Interfaces, 7(33), pp. 18483-90. doi:10.1021/acsami.5b04652.
Park AR, et al. Si/Ti2O3/Reduced Graphene Oxide Nanocomposite Anodes for Lithium-Ion Batteries With Highly Enhanced Cyclic Stability. ACS Appl Mater Interfaces. 2015 Aug 26;7(33):18483-90. PubMed PMID: 26244752.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Si/Ti2O3/Reduced Graphene Oxide Nanocomposite Anodes for Lithium-Ion Batteries with Highly Enhanced Cyclic Stability. AU - Park,A Reum, AU - Son,Dae-Yong, AU - Kim,Jung Sub, AU - Lee,Jun Young, AU - Park,Nam-Gyu, AU - Park,Juhyun, AU - Lee,Joong Kee, AU - Yoo,Pil J, Y1 - 2015/08/12/ PY - 2015/8/6/entrez PY - 2015/8/6/pubmed PY - 2015/8/6/medline KW - anodes KW - lithium-ion batteries KW - reduced graphene oxide KW - reduced titanium oxide KW - silicon SP - 18483 EP - 90 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 7 IS - 33 N2 - Silicon (Si) has attracted tremendous attention as a high-capacity anode material for next generation Li-ion batteries (LIBs); unfortunately, it suffers from poor cyclic stability due to excessive volume expansion and reduced electrical conductivity after repeated cycles. To circumvent these issues, we propose that Si can be complexed with electrically conductive Ti2O3 to significantly enhance the reversible capacity and cyclic stability of Si-based anodes. We prepared a ternary nanocomposite of Si/Ti2O3/reduced graphene oxide (rGO) using mechanical blending and subsequent thermal reduction of the Si, TiO2 nanoparticles, and rGO nanosheets. As a result, the obtained ternary nanocomposite exhibited a specific capacity of 985 mAh/g and a Coulombic efficiency of 98.4% after 100 cycles at a current density of 100 mA/g. Furthermore, these ternary nanocomposite anodes exhibited outstanding rate capability characteristics, even with an increased current density of 10 A/g. This excellent electrochemical performance can be ascribed to the improved electron and ion transport provided by the Ti2O3 phase within the Si domains and the structurally reinforced conductive framework comprised of the rGO nanosheets. Therefore, it is expected that our approach can also be applied to other anode materials to enable large reversible capacity, excellent cyclic stability, and good rate capability for high-performance LIBs. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/26244752/Si/Ti2O3/Reduced_Graphene_Oxide_Nanocomposite_Anodes_for_Lithium_Ion_Batteries_with_Highly_Enhanced_Cyclic_Stability_ L2 - https://dx.doi.org/10.1021/acsami.5b04652 DB - PRIME DP - Unbound Medicine ER -