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Caging Nb2 O5 Nanowires in PECVD-Derived Graphene Capsules toward Bendable Sodium-Ion Hybrid Supercapacitors.
Adv Mater 2018; 30(26):e1800963AM

Abstract

Sodium-ion hybrid supercapacitors (Na-HSCs) by virtue of synergizing the merits of batteries and supercapacitors have attracted considerable attention for high-energy and high-power energy-storage applications. Orthorhombic Nb2 O5 (T-Nb2 O5) has recently been recognized as a promising anode material for Na-HSCs due to its typical pseudocapacitive feature, but it suffers from intrinsically low electrical conductivity. Reasonably high electrochemical performance of T-Nb2 O5 -based electrodes could merely be gained to date when sufficient carbon content was introduced. In addition, flexible Na-HSC devices have scarcely been demonstrated by far. Herein, an in situ encapsulation strategy is devised to directly grow ultrathin graphene shells over T-Nb2 O5 nanowires (denoted as Gr-Nb2 O5 composites) by plasma-enhanced chemical vapor deposition, targeting a highly conductive anode material for Na-HSCs. The few-layered graphene capsules with ample topological defects would enable facile electron and Na+ ion transport, guaranteeing rapid pseudocapacitive processes at the Nb2 O5 /electrolyte interface. The Na-HSC full-cell comprising a Gr-Nb2 O5 anode and an activated carbon cathode delivers high energy/power densities (112.9 Wh kg-1 /80.1 W kg-1 and 62.2 Wh kg-1 /5330 W kg-1), outperforming those of recently reported Na-HSC counterparts. Proof-of-concept Na-HSC devices with favorable mechanical robustness manifest stable electrochemical performances under different bending conditions and after various bending-release cycles.

Authors+Show Affiliations

Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China.Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China. Center for Nanochemistry (CNC), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29761546

Citation

Wang, Xiangguo, et al. "Caging Nb2 O5 Nanowires in PECVD-Derived Graphene Capsules Toward Bendable Sodium-Ion Hybrid Supercapacitors." Advanced Materials (Deerfield Beach, Fla.), vol. 30, no. 26, 2018, pp. e1800963.
Wang X, Li Q, Zhang L, et al. Caging Nb2 O5 Nanowires in PECVD-Derived Graphene Capsules toward Bendable Sodium-Ion Hybrid Supercapacitors. Adv Mater Weinheim. 2018;30(26):e1800963.
Wang, X., Li, Q., Zhang, L., Hu, Z., Yu, L., Jiang, T., ... Liu, Z. (2018). Caging Nb2 O5 Nanowires in PECVD-Derived Graphene Capsules toward Bendable Sodium-Ion Hybrid Supercapacitors. Advanced Materials (Deerfield Beach, Fla.), 30(26), pp. e1800963. doi:10.1002/adma.201800963.
Wang X, et al. Caging Nb2 O5 Nanowires in PECVD-Derived Graphene Capsules Toward Bendable Sodium-Ion Hybrid Supercapacitors. Adv Mater Weinheim. 2018;30(26):e1800963. PubMed PMID: 29761546.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Caging Nb2 O5 Nanowires in PECVD-Derived Graphene Capsules toward Bendable Sodium-Ion Hybrid Supercapacitors. AU - Wang,Xiangguo, AU - Li,Qiucheng, AU - Zhang,Li, AU - Hu,Zhongli, AU - Yu,Lianghao, AU - Jiang,Tao, AU - Lu,Chen, AU - Yan,Chenglin, AU - Sun,Jingyu, AU - Liu,Zhongfan, Y1 - 2018/05/14/ PY - 2018/02/10/received PY - 2018/03/16/revised PY - 2018/5/16/pubmed PY - 2018/5/16/medline PY - 2018/5/16/entrez KW - Nb2O5 nanowires KW - direct growth KW - graphene capsules KW - plasma-enhanced CVD KW - sodium-ion hybrid supercapacitors SP - e1800963 EP - e1800963 JF - Advanced materials (Deerfield Beach, Fla.) JO - Adv. Mater. Weinheim VL - 30 IS - 26 N2 - Sodium-ion hybrid supercapacitors (Na-HSCs) by virtue of synergizing the merits of batteries and supercapacitors have attracted considerable attention for high-energy and high-power energy-storage applications. Orthorhombic Nb2 O5 (T-Nb2 O5) has recently been recognized as a promising anode material for Na-HSCs due to its typical pseudocapacitive feature, but it suffers from intrinsically low electrical conductivity. Reasonably high electrochemical performance of T-Nb2 O5 -based electrodes could merely be gained to date when sufficient carbon content was introduced. In addition, flexible Na-HSC devices have scarcely been demonstrated by far. Herein, an in situ encapsulation strategy is devised to directly grow ultrathin graphene shells over T-Nb2 O5 nanowires (denoted as Gr-Nb2 O5 composites) by plasma-enhanced chemical vapor deposition, targeting a highly conductive anode material for Na-HSCs. The few-layered graphene capsules with ample topological defects would enable facile electron and Na+ ion transport, guaranteeing rapid pseudocapacitive processes at the Nb2 O5 /electrolyte interface. The Na-HSC full-cell comprising a Gr-Nb2 O5 anode and an activated carbon cathode delivers high energy/power densities (112.9 Wh kg-1 /80.1 W kg-1 and 62.2 Wh kg-1 /5330 W kg-1), outperforming those of recently reported Na-HSC counterparts. Proof-of-concept Na-HSC devices with favorable mechanical robustness manifest stable electrochemical performances under different bending conditions and after various bending-release cycles. SN - 1521-4095 UR - https://www.unboundmedicine.com/medline/citation/29761546/Caging_Nb2_O5_Nanowires_in_PECVD_Derived_Graphene_Capsules_toward_Bendable_Sodium_Ion_Hybrid_Supercapacitors_ L2 - https://doi.org/10.1002/adma.201800963 DB - PRIME DP - Unbound Medicine ER -