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Free-Standing T-Nb2O5/Graphene Composite Papers with Ultrahigh Gravimetric/Volumetric Capacitance for Li-Ion Intercalation Pseudocapacitor
Abstract
Free-standing electrodes with high gravimetric/volumetric capacitance will open up potential applications in miniaturized consumer electronics. Herein, we report a simple synthesis technology of free-standing orthorhombic Nb2O5 (T-Nb2O5)/graphene composite papers for Li-intercalating pseudocapacitive electrodes. Through a facile polyol-mediated solvothermal reaction, the Nb2O5 nanodots are homogeneously decorated onto the surface of reduced graphite oxide (rGO), which can form a homogeneous Nb2O5/rGO colloidal suspension that can be easily fabricated into flexible composite papers. The heat-treated T-Nb2O5/graphene composite papers exhibit a nanoporous layer-stacked structure with good ionic-electric conductive pathways, high T-Nb2O5 loading of 74.2%, and high bulk density of 1.55 g cm(-3). Such T-Nb2O5/graphene composite papers show a superior pseudocapacitor performance as free-standing electrodes, as evidenced by an ultrahigh gravimetric/volumetric capacitance (620.5 F g(-1) and 961.8 F cm(-3) at 1 mV s(-1)) and excellent rate capability. Furthermore, an organic electrolyte-based asymmetric supercapacitor is assembled based on T-Nb2O5/graphene composite papers, which can deliver a high energy density of 47 W h kg(-1) and power density of 18 kW kg(-1).
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Cited by
Advanced Energy Storage Devices: Basic Principles, Analytical Methods, and Rational Materials Design
Liu, J., Wang, J., Xu, C., Jiang, H., Li, C., Zhang, L., Lin, J., & Shen, Z. X. (2018) · Advanced Science · doi:10.1002/advs.201700322 · Cited by 1,745
Self-citationWang, Q., Yan, J., & Fan, Z. (2016) · Energy & Environmental Science · doi:10.1039/c5ee03109e · Cited by 1,225
Nonaqueous Hybrid Lithium‐Ion and Sodium‐Ion Capacitors
Wang, H., Zhu, C., Chao, D., Yan, Q., & Fan, H. J. (2017) · Advanced Materials · doi:10.1002/adma.201702093 · Cited by 870
Wearable Chemical Sensors: Present Challenges and Future Prospects
Bandodkar, A. J., Jeerapan, I., & Wang, J. (2016) · ACS Sensors · doi:10.1021/acssensors.6b00250 · Cited by 778
Self-citationLiu, Y., Jiang, S. P., & Shao, Z. (2020) · Materials Today Advances · doi:10.1016/j.mtadv.2020.100072 · Cited by 477
Metadata
- Authors
- Kong, L., Zhang, C., Wang, J., Qiao, W., Ling, L., & Long, D.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-10-02
- Volume
- 9
- Issue
- 11
- Pages
- 11200-11208
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2340338681
- Cited by
- 407
- References
- 0
- FWCI
- 14.75
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Free-Standing T-Nb2O5/Graphene Composite Papers with Ultrahigh Gravimetric/Volumetric Capacitance for Li-Ion Intercalation Pseudocapacitor. https://app.cochat.ai/papers/10.1021/acsnano.5b04737
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- Kong, L., Zhang, C., Wang, J., Qiao, W., Ling, L., & Long, D. (2015). Free-Standing T-Nb2O5/Graphene Composite Papers with Ultrahigh Gravimetric/Volumetric Capacitance for Li-Ion Intercalation Pseudocapacitor. ACS Nano. https://doi.org/10.1021/acsnano.5b04737
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