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Multishelled NiO Hollow Microspheres for High-performance Supercapacitors with Ultrahigh Energy Density and Robust Cycle Life.
Sci Rep 2016; 6:33241SR

Abstract

Multishelled NiO hollow microspheres for high-performance supercapacitors have been prepared and the formation mechanism has been investigated. By using resin microspheres to absorb Ni(2+) and subsequent proper calcinations, the shell numbers, shell spacing and exterior shell structure were facilely controlled via varying synthetic parameters. Particularly, the exterior shell structure that accurately associated with the ion transfer is finely controlled by forming a single shell or closed exterior double-shells. Among multishelled NiO hollow microspheres, the triple-shelled NiO with an outer single-shelled microspheres show a remarkable capacity of 1280 F g(-1) at 1 A g(-1), and still keep a high value of 704 F g(-1) even at 20 A g(-1). The outstanding performances are attributed to its fast ion/electron transfer, high specific surface area and large shell space. The specific capacitance gradually increases to 108% of its initial value after 2500 cycles, demonstrating its high stability. Importantly, the 3S-NiO-HMS//RGO@Fe3O4 asymmetric supercapacitor shows an ultrahigh energy density of 51.0 Wh kg(-1) at a power density of 800 W kg(-1), and 78.8% capacitance retention after 10,000 cycles. Furthermore, multishelled NiO can be transferred into multishelled Ni microspheres with high-efficient H2 generation rate of 598.5 mL H2 min(-1) g(-1)Ni for catalytic hydrolysis of NH3BH3 (AB).

Authors+Show Affiliations

State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology Linggong Road 2#, Dalian 116024, China.State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology Linggong Road 2#, Dalian 116024, China.State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology Linggong Road 2#, Dalian 116024, China.State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology Linggong Road 2#, Dalian 116024, China.

Pub Type(s)

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

Language

eng

PubMed ID

27616420

Citation

Qi, Xinhong, et al. "Multishelled NiO Hollow Microspheres for High-performance Supercapacitors With Ultrahigh Energy Density and Robust Cycle Life." Scientific Reports, vol. 6, 2016, p. 33241.
Qi X, Zheng W, Li X, et al. Multishelled NiO Hollow Microspheres for High-performance Supercapacitors with Ultrahigh Energy Density and Robust Cycle Life. Sci Rep. 2016;6:33241.
Qi, X., Zheng, W., Li, X., & He, G. (2016). Multishelled NiO Hollow Microspheres for High-performance Supercapacitors with Ultrahigh Energy Density and Robust Cycle Life. Scientific Reports, 6, p. 33241. doi:10.1038/srep33241.
Qi X, et al. Multishelled NiO Hollow Microspheres for High-performance Supercapacitors With Ultrahigh Energy Density and Robust Cycle Life. Sci Rep. 2016 09 12;6:33241. PubMed PMID: 27616420.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multishelled NiO Hollow Microspheres for High-performance Supercapacitors with Ultrahigh Energy Density and Robust Cycle Life. AU - Qi,Xinhong, AU - Zheng,Wenji, AU - Li,Xiangcun, AU - He,Gaohong, Y1 - 2016/09/12/ PY - 2016/02/29/received PY - 2016/08/22/accepted PY - 2016/9/13/entrez PY - 2016/9/13/pubmed PY - 2016/9/13/medline SP - 33241 EP - 33241 JF - Scientific reports JO - Sci Rep VL - 6 N2 - Multishelled NiO hollow microspheres for high-performance supercapacitors have been prepared and the formation mechanism has been investigated. By using resin microspheres to absorb Ni(2+) and subsequent proper calcinations, the shell numbers, shell spacing and exterior shell structure were facilely controlled via varying synthetic parameters. Particularly, the exterior shell structure that accurately associated with the ion transfer is finely controlled by forming a single shell or closed exterior double-shells. Among multishelled NiO hollow microspheres, the triple-shelled NiO with an outer single-shelled microspheres show a remarkable capacity of 1280 F g(-1) at 1 A g(-1), and still keep a high value of 704 F g(-1) even at 20 A g(-1). The outstanding performances are attributed to its fast ion/electron transfer, high specific surface area and large shell space. The specific capacitance gradually increases to 108% of its initial value after 2500 cycles, demonstrating its high stability. Importantly, the 3S-NiO-HMS//RGO@Fe3O4 asymmetric supercapacitor shows an ultrahigh energy density of 51.0 Wh kg(-1) at a power density of 800 W kg(-1), and 78.8% capacitance retention after 10,000 cycles. Furthermore, multishelled NiO can be transferred into multishelled Ni microspheres with high-efficient H2 generation rate of 598.5 mL H2 min(-1) g(-1)Ni for catalytic hydrolysis of NH3BH3 (AB). SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/27616420/Multishelled_NiO_Hollow_Microspheres_for_High_performance_Supercapacitors_with_Ultrahigh_Energy_Density_and_Robust_Cycle_Life_ L2 - http://dx.doi.org/10.1038/srep33241 DB - PRIME DP - Unbound Medicine ER -