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Free-Standing Hybrid Graphene Paper Encapsulating Nanostructures for High Cycle-Life Supercapacitors.
ChemSusChem 2018; 11(5):907-915C

Abstract

The incorporation of spacers between graphene sheets has been investigated as an effective method to improve the electrochemical performance of graphene papers (GPs) for supercapacitors. Here, we report the design of free-standing GP@NiO and GP@Ni hybrid GPs in which NiO nanoclusters and Ni nanoparticles are encapsulated into graphene sheets through electrostatic assembly and subsequent vacuum filtration. The encapsulated NiO nanoclusters and Ni nanoparticles can mitigate the restacking of graphene sheets, providing sufficient spaces for high-speed ion diffusion and electron transport. In addition, the spacers strongly bind to graphene sheets, which can efficiently improve the electrochemical stability. Therefore, at a current density of 0.5 A g-1 , the GP@NiO and GP@Ni electrodes exhibit higher specific capacitances of 306.9 and 246.1 F g-1 than the GP electrode (185.7 F g-1). The GP@NiO and GP@Ni electrodes exhibit capacitance retention of 98.7 % and 95.6 % after 10000 cycles, demonstrating an outstanding cycling stability. Additionally, the GP@NiO∥GP@Ni delivers excellent cycling stability (93.7 % after 10 000 cycles) and high energy density. These free-standing encapsulated hybrid GPs have great potential as electrode for high-performance supercapacitors.

Authors+Show Affiliations

Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, PR China.Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, PR China.Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, PR China.Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, PR China.Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, PR China.Key Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, PR China.Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Jerusalem, 9190401, Israel.

Pub Type(s)

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

Language

eng

PubMed ID

29388379

Citation

Jiao, Xinyan, et al. "Free-Standing Hybrid Graphene Paper Encapsulating Nanostructures for High Cycle-Life Supercapacitors." ChemSusChem, vol. 11, no. 5, 2018, pp. 907-915.
Jiao X, Hao Q, Xia X, et al. Free-Standing Hybrid Graphene Paper Encapsulating Nanostructures for High Cycle-Life Supercapacitors. ChemSusChem. 2018;11(5):907-915.
Jiao, X., Hao, Q., Xia, X., Lei, W., Ouyang, Y., Ye, H., & Mandler, D. (2018). Free-Standing Hybrid Graphene Paper Encapsulating Nanostructures for High Cycle-Life Supercapacitors. ChemSusChem, 11(5), pp. 907-915. doi:10.1002/cssc.201702283.
Jiao X, et al. Free-Standing Hybrid Graphene Paper Encapsulating Nanostructures for High Cycle-Life Supercapacitors. ChemSusChem. 2018 03 9;11(5):907-915. PubMed PMID: 29388379.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Free-Standing Hybrid Graphene Paper Encapsulating Nanostructures for High Cycle-Life Supercapacitors. AU - Jiao,Xinyan, AU - Hao,Qingli, AU - Xia,Xifeng, AU - Lei,Wu, AU - Ouyang,Yu, AU - Ye,Haitao, AU - Mandler,Daniel, Y1 - 2018/02/14/ PY - 2017/12/03/received PY - 2018/01/29/revised PY - 2018/2/2/pubmed PY - 2019/4/10/medline PY - 2018/2/2/entrez KW - cycle life KW - free standing KW - graphene paper KW - nickel KW - supercapacitors SP - 907 EP - 915 JF - ChemSusChem JO - ChemSusChem VL - 11 IS - 5 N2 - The incorporation of spacers between graphene sheets has been investigated as an effective method to improve the electrochemical performance of graphene papers (GPs) for supercapacitors. Here, we report the design of free-standing GP@NiO and GP@Ni hybrid GPs in which NiO nanoclusters and Ni nanoparticles are encapsulated into graphene sheets through electrostatic assembly and subsequent vacuum filtration. The encapsulated NiO nanoclusters and Ni nanoparticles can mitigate the restacking of graphene sheets, providing sufficient spaces for high-speed ion diffusion and electron transport. In addition, the spacers strongly bind to graphene sheets, which can efficiently improve the electrochemical stability. Therefore, at a current density of 0.5 A g-1 , the GP@NiO and GP@Ni electrodes exhibit higher specific capacitances of 306.9 and 246.1 F g-1 than the GP electrode (185.7 F g-1). The GP@NiO and GP@Ni electrodes exhibit capacitance retention of 98.7 % and 95.6 % after 10000 cycles, demonstrating an outstanding cycling stability. Additionally, the GP@NiO∥GP@Ni delivers excellent cycling stability (93.7 % after 10 000 cycles) and high energy density. These free-standing encapsulated hybrid GPs have great potential as electrode for high-performance supercapacitors. SN - 1864-564X UR - https://www.unboundmedicine.com/medline/citation/29388379/Free_Standing_Hybrid_Graphene_Paper_Encapsulating_Nanostructures_for_High_Cycle_Life_Supercapacitors_ L2 - https://doi.org/10.1002/cssc.201702283 DB - PRIME DP - Unbound Medicine ER -