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Incorporation of Manganese Dioxide within Ultraporous Activated Graphene for High-Performance Electrochemical Capacitors
Abstract
Manganese dioxide (MnO(2)) particles 2-3 nm in size were deposited onto a porous "activated microwave expanded graphite oxide" (aMEGO) carbon scaffold via a self-controlled redox process. Symmetric electrochemical capacitors were fabricated that yielded a specific capacitance of 256 F/g (volumetric: 640 F/cm(3)) and a capacitance retention of 87.7% after 1000 cycles in 1 M H(2)SO(4); when normalized to MnO(2), the specific capacitance was 850 F/g. Asymmetric electrochemical capacitors were also fabricated with aMEGO/MnO(2) as the positive electrode and aMEGO as the negative electrode and had a power density of 32.3 kW/kg (for an energy density of 20.8 Wh/kg), an energy density of 24.3 Wh/kg (for a power density of 24.5 kW/kg), and a capacitance retention of 80.5% over 5000 cycles.
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Citations
Cited by
Wang, Q., Yan, J., & Fan, Z. (2016) · Energy & Environmental Science · doi:10.1039/c5ee03109e · Cited by 1,225
Electrochemistry of Graphene and Related Materials
Ambrosi, A., Chua, C. K., Bonanni, A., & Pumera, M. (2014) · Chemical Reviews · doi:10.1021/cr500023c · Cited by 1,208
Peanut shell hybrid sodium ion capacitor with extreme energy–power rivals lithium ion capacitors
Ding, J., Wang, H., Li, Z., Cui, K., Karpuzov, D., Tan, X., Kohandehghan, A., & Mitlin, D. (2015) · Energy & Environmental Science · doi:10.1039/c4ee02986k · Cited by 818
Carbon as catalyst and support for electrochemical energy conversion
Trogadas, P., Fuller, T. F., & Strasser, P. (2014) · Carbon · doi:10.1016/j.carbon.2014.04.005 · Cited by 522
Materials Design and System Construction for Conventional and New‐Concept Supercapacitors
Wu, Z., Li, L., Yan, J., & Zhang, X. (2017) · Advanced Science · doi:10.1002/advs.201600382 · Cited by 470
Metadata
- Authors
- Zhao, X., Zhang, L., Murali, S., Stoller, M. D., Zhang, Q., Zhu, Y., & Ruoff, R. S.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-05-10
- Volume
- 6
- Issue
- 6
- Pages
- 5404-5412
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2088462783
- Cited by
- 377
- References
- 0
- FWCI
- 18.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zhao, X., Zhang, L., Murali, S., Stoller, M. D., Zhang, Q., Zhu, Y., & Ruoff, R. S. (2012). Incorporation of Manganese Dioxide within Ultraporous Activated Graphene for High-Performance Electrochemical Capacitors. ACS Nano. https://doi.org/10.1021/nn3012916
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