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Mesopore-Induced Ultrafast Na+ -Storage in T-Nb2 O5 /Carbon Nanofiber Films toward Flexible High-Power Na-Ion Capacitors.
Small 2019; 15(9):e1804539S

Abstract

Hybrid Na-ion capacitors (NICs) are receiving considerable interest because they combine the merits of both batteries and supercapacitors and because of the low-cost of sodium resources. However, further large-scale deployment of NICs is impeded by the sluggish diffusion of Na+ in the anode. To achieve rapid redox kinetics, herein the controlled fabrication of mesoporous orthorhombic-Nb2 O5 (T-Nb2 O5)/carbon nanofiber (CNF) networks is demonstrated via in situ SiO2 -etching. The as-obtained mesoporous T-Nb2 O5 (m-Nb2 O5)/CNF membranes are mechanically flexible without using any additives, binders, or current collectors. The in situ formed mesopores can efficiently increase Na+ -storage performances of the m-Nb2 O5 /CNF electrode, such as excellent rate capability (up to 150 C) and outstanding cyclability (94% retention after 10 000 cycles at 100 C). A flexible NIC device based on the m-Nb2 O5 /CNF anode and the graphene framework (GF)/mesoporous carbon nanofiber (mCNF) cathode, is further constructed, and delivers an ultrahigh power density of 60 kW kg-1 at 55 Wh kg-1 (based on the total weight of m-Nb2 O5 /CNF and GF/mCNF). More importantly, owing to the free-standing flexible electrode configuration, the m-Nb2 O5 /CNF//GF/mCNF NIC exhibits high volumetric energy and power densities (11.2 mWh cm-3 , 5.4 W cm-3) based on the full device, which holds great promise in a wide variety of flexible electronics.

Authors+Show Affiliations

Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material and Chemistry, China University of Geosciences, Wuhan, 430074, China.State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30701686

Citation

Li, Yuzhu, et al. "Mesopore-Induced Ultrafast Na+ -Storage in T-Nb2 O5 /Carbon Nanofiber Films Toward Flexible High-Power Na-Ion Capacitors." Small (Weinheim an Der Bergstrasse, Germany), vol. 15, no. 9, 2019, pp. e1804539.
Li Y, Wang H, Wang L, et al. Mesopore-Induced Ultrafast Na+ -Storage in T-Nb2 O5 /Carbon Nanofiber Films toward Flexible High-Power Na-Ion Capacitors. Small. 2019;15(9):e1804539.
Li, Y., Wang, H., Wang, L., Mao, Z., Wang, R., He, B., ... Hu, X. (2019). Mesopore-Induced Ultrafast Na+ -Storage in T-Nb2 O5 /Carbon Nanofiber Films toward Flexible High-Power Na-Ion Capacitors. Small (Weinheim an Der Bergstrasse, Germany), 15(9), pp. e1804539. doi:10.1002/smll.201804539.
Li Y, et al. Mesopore-Induced Ultrafast Na+ -Storage in T-Nb2 O5 /Carbon Nanofiber Films Toward Flexible High-Power Na-Ion Capacitors. Small. 2019;15(9):e1804539. PubMed PMID: 30701686.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mesopore-Induced Ultrafast Na+ -Storage in T-Nb2 O5 /Carbon Nanofiber Films toward Flexible High-Power Na-Ion Capacitors. AU - Li,Yuzhu, AU - Wang,Huanwen, AU - Wang,Libin, AU - Mao,Zhifei, AU - Wang,Rui, AU - He,Beibei, AU - Gong,Yansheng, AU - Hu,Xianluo, Y1 - 2019/01/30/ PY - 2018/10/30/received PY - 2019/01/05/revised PY - 2019/2/1/pubmed PY - 2019/2/1/medline PY - 2019/2/1/entrez KW - Nb2O5 KW - carbon nanofibers KW - flexible KW - mesoporous KW - sodium-ion capacitors SP - e1804539 EP - e1804539 JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 15 IS - 9 N2 - Hybrid Na-ion capacitors (NICs) are receiving considerable interest because they combine the merits of both batteries and supercapacitors and because of the low-cost of sodium resources. However, further large-scale deployment of NICs is impeded by the sluggish diffusion of Na+ in the anode. To achieve rapid redox kinetics, herein the controlled fabrication of mesoporous orthorhombic-Nb2 O5 (T-Nb2 O5)/carbon nanofiber (CNF) networks is demonstrated via in situ SiO2 -etching. The as-obtained mesoporous T-Nb2 O5 (m-Nb2 O5)/CNF membranes are mechanically flexible without using any additives, binders, or current collectors. The in situ formed mesopores can efficiently increase Na+ -storage performances of the m-Nb2 O5 /CNF electrode, such as excellent rate capability (up to 150 C) and outstanding cyclability (94% retention after 10 000 cycles at 100 C). A flexible NIC device based on the m-Nb2 O5 /CNF anode and the graphene framework (GF)/mesoporous carbon nanofiber (mCNF) cathode, is further constructed, and delivers an ultrahigh power density of 60 kW kg-1 at 55 Wh kg-1 (based on the total weight of m-Nb2 O5 /CNF and GF/mCNF). More importantly, owing to the free-standing flexible electrode configuration, the m-Nb2 O5 /CNF//GF/mCNF NIC exhibits high volumetric energy and power densities (11.2 mWh cm-3 , 5.4 W cm-3) based on the full device, which holds great promise in a wide variety of flexible electronics. SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/30701686/Mesopore_Induced_Ultrafast_Na+__Storage_in_T_Nb2_O5_/Carbon_Nanofiber_Films_toward_Flexible_High_Power_Na_Ion_Capacitors_ L2 - https://doi.org/10.1002/smll.201804539 DB - PRIME DP - Unbound Medicine ER -