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Ultrasmall TiO2-Coated Reduced Graphene Oxide Composite as a High-Rate and Long-Cycle-Life Anode Material for Sodium-Ion Batteries.
ACS Appl Mater Interfaces. 2018 May 02; 10(17):14818-14826.AA

Abstract

Because of the low cost and abundant nature of the sodium element, sodium-ion batteries (SIBs) are attracting extensive attention, and a variety of SIB cathode materials have been discovered. However, the lack of high-performance anode materials is a major challenge of SIBs. Herein, we have synthesized ultrasmall TiO2-nanoparticle-coated reduced graphene oxide (TiO2@RGO) composites by using a one-pot hydrolysis method, which are then investigated as anode materials for SIBs. The morphology of TiO2@RGO has been characterized using transmission electron microscopy, indicating that the TiO2 nanospheres uniformly grow on the surface of the RGO nanosheet. As-prepared TiO2@RGO composites exhibited a promising electrochemical performance in terms of cycling stability and rate capability, especially the initial cycle Coulombic efficiency of 60.7%, which is higher than that in previous reports. The kinetics of the electrode reaction has been investigated by cyclic voltammetry. The results indicate that the sodium-ion intercalation/extraction behavior is not controlled by the semiinfinite diffusion process, which gives rise to an outstanding rate performance. In addition, the electrochemical performance of TiO2@RGO composites in full cells, coupled with carbon-coated Na3V2(PO4)3 as the positive material, has been investigated. The discharge specific capacity was up to 117.2 mAh g-1, and it remained at 84.6 mAh g-1 after 500 cycles under a current density of 2 A g-1, which shows excellent cycling stability.

Authors+Show Affiliations

Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy , Fudan University , Shanghai 200433 , People's Republic of China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29641170

Citation

Liu, Yao, et al. "Ultrasmall TiO2-Coated Reduced Graphene Oxide Composite as a High-Rate and Long-Cycle-Life Anode Material for Sodium-Ion Batteries." ACS Applied Materials & Interfaces, vol. 10, no. 17, 2018, pp. 14818-14826.
Liu Y, Liu J, Bin D, et al. Ultrasmall TiO2-Coated Reduced Graphene Oxide Composite as a High-Rate and Long-Cycle-Life Anode Material for Sodium-Ion Batteries. ACS Appl Mater Interfaces. 2018;10(17):14818-14826.
Liu, Y., Liu, J., Bin, D., Hou, M., Tamirat, A. G., Wang, Y., & Xia, Y. (2018). Ultrasmall TiO2-Coated Reduced Graphene Oxide Composite as a High-Rate and Long-Cycle-Life Anode Material for Sodium-Ion Batteries. ACS Applied Materials & Interfaces, 10(17), 14818-14826. https://doi.org/10.1021/acsami.8b03722
Liu Y, et al. Ultrasmall TiO2-Coated Reduced Graphene Oxide Composite as a High-Rate and Long-Cycle-Life Anode Material for Sodium-Ion Batteries. ACS Appl Mater Interfaces. 2018 May 2;10(17):14818-14826. PubMed PMID: 29641170.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ultrasmall TiO2-Coated Reduced Graphene Oxide Composite as a High-Rate and Long-Cycle-Life Anode Material for Sodium-Ion Batteries. AU - Liu,Yao, AU - Liu,Jingyuan, AU - Bin,Duan, AU - Hou,Mengyan, AU - Tamirat,Andebet Gedamu, AU - Wang,Yonggang, AU - Xia,Yongyao, Y1 - 2018/04/23/ PY - 2018/4/12/pubmed PY - 2018/4/12/medline PY - 2018/4/12/entrez KW - TiO2 KW - anode material KW - initial cycle Coulombic efficiency KW - reduced graphene oxide KW - sodium-ion batteries SP - 14818 EP - 14826 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 10 IS - 17 N2 - Because of the low cost and abundant nature of the sodium element, sodium-ion batteries (SIBs) are attracting extensive attention, and a variety of SIB cathode materials have been discovered. However, the lack of high-performance anode materials is a major challenge of SIBs. Herein, we have synthesized ultrasmall TiO2-nanoparticle-coated reduced graphene oxide (TiO2@RGO) composites by using a one-pot hydrolysis method, which are then investigated as anode materials for SIBs. The morphology of TiO2@RGO has been characterized using transmission electron microscopy, indicating that the TiO2 nanospheres uniformly grow on the surface of the RGO nanosheet. As-prepared TiO2@RGO composites exhibited a promising electrochemical performance in terms of cycling stability and rate capability, especially the initial cycle Coulombic efficiency of 60.7%, which is higher than that in previous reports. The kinetics of the electrode reaction has been investigated by cyclic voltammetry. The results indicate that the sodium-ion intercalation/extraction behavior is not controlled by the semiinfinite diffusion process, which gives rise to an outstanding rate performance. In addition, the electrochemical performance of TiO2@RGO composites in full cells, coupled with carbon-coated Na3V2(PO4)3 as the positive material, has been investigated. The discharge specific capacity was up to 117.2 mAh g-1, and it remained at 84.6 mAh g-1 after 500 cycles under a current density of 2 A g-1, which shows excellent cycling stability. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/29641170/Ultrasmall_TiO2_Coated_Reduced_Graphene_Oxide_Composite_as_a_High_Rate_and_Long_Cycle_Life_Anode_Material_for_Sodium_Ion_Batteries_ L2 - https://doi.org/10.1021/acsami.8b03722 DB - PRIME DP - Unbound Medicine ER -
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