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Constructed uninterrupted charge-transfer pathways in three-dimensional micro/nanointerconnected carbon-based electrodes for high energy-density ultralight flexible supercapacitors.
ACS Appl Mater Interfaces 2014; 6(1):210-8AA

Abstract

A type of freestanding three-dimensional (3D) micro/nanointerconnected structure, with a conjunction of microsized 3D graphene networks, nanosized 3D carbon nanofiber (CNF) forests, and consequently loaded MnO2 nanosheets, has been designed as the electrodes of an ultralight flexible supercapacitor. The resulting 3D graphene/CNFs/MnO2 composite networks exhibit remarkable flexibility and highly mechanical properties due to good and intimate contacts among them, without current collectors and binders. Simultaneously, this designed 3D micro/nanointerconnected structure can provide an uninterrupted double charges freeway network for both electron and electrolyte ion to minimize electron accumulation and ion-diffusing resistance, leading to an excellent electrochemical performance. The ultrahigh specific capacitance of 946 F/g from cyclic voltammetry (CV) (or 920 F/g from galvanostatic charging/discharging (GCD)) were obtained, which is superior to that of the present electrode materials based on 3D graphene/MnO2 hybrid structure (482 F/g). Furthermore, we have also investigated the superior electrochemical performances of an asymmetric supercapacitor device (weight of less than 12 mg/cm(2) and thickness of ~0.8 mm), showing a total capacitance of 0.33 F/cm(2) at a window voltage of 1.8 V and a maximum energy density of 53.4 W h/kg for driving a digital clock for 42 min. These inspiring performances would make our designed supercapacitors become one of the most promising candidates for the future flexible and lightweight energy storage systems.

Authors+Show Affiliations

School of Physical Science and Technology and §College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, Gansu, P.R. China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24325338

Citation

He, Yongmin, et al. "Constructed Uninterrupted Charge-transfer Pathways in Three-dimensional Micro/nanointerconnected Carbon-based Electrodes for High Energy-density Ultralight Flexible Supercapacitors." ACS Applied Materials & Interfaces, vol. 6, no. 1, 2014, pp. 210-8.
He Y, Chen W, Zhou J, et al. Constructed uninterrupted charge-transfer pathways in three-dimensional micro/nanointerconnected carbon-based electrodes for high energy-density ultralight flexible supercapacitors. ACS Appl Mater Interfaces. 2014;6(1):210-8.
He, Y., Chen, W., Zhou, J., Li, X., Tang, P., Zhang, Z., ... Xie, E. (2014). Constructed uninterrupted charge-transfer pathways in three-dimensional micro/nanointerconnected carbon-based electrodes for high energy-density ultralight flexible supercapacitors. ACS Applied Materials & Interfaces, 6(1), pp. 210-8. doi:10.1021/am403760h.
He Y, et al. Constructed Uninterrupted Charge-transfer Pathways in Three-dimensional Micro/nanointerconnected Carbon-based Electrodes for High Energy-density Ultralight Flexible Supercapacitors. ACS Appl Mater Interfaces. 2014 Jan 8;6(1):210-8. PubMed PMID: 24325338.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Constructed uninterrupted charge-transfer pathways in three-dimensional micro/nanointerconnected carbon-based electrodes for high energy-density ultralight flexible supercapacitors. AU - He,Yongmin, AU - Chen,Wanjun, AU - Zhou,Jinyuan, AU - Li,Xiaodong, AU - Tang,Pengyi, AU - Zhang,Zhenxing, AU - Fu,Jiecai, AU - Xie,Erqing, Y1 - 2013/12/16/ PY - 2013/12/12/entrez PY - 2013/12/12/pubmed PY - 2013/12/12/medline SP - 210 EP - 8 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 6 IS - 1 N2 - A type of freestanding three-dimensional (3D) micro/nanointerconnected structure, with a conjunction of microsized 3D graphene networks, nanosized 3D carbon nanofiber (CNF) forests, and consequently loaded MnO2 nanosheets, has been designed as the electrodes of an ultralight flexible supercapacitor. The resulting 3D graphene/CNFs/MnO2 composite networks exhibit remarkable flexibility and highly mechanical properties due to good and intimate contacts among them, without current collectors and binders. Simultaneously, this designed 3D micro/nanointerconnected structure can provide an uninterrupted double charges freeway network for both electron and electrolyte ion to minimize electron accumulation and ion-diffusing resistance, leading to an excellent electrochemical performance. The ultrahigh specific capacitance of 946 F/g from cyclic voltammetry (CV) (or 920 F/g from galvanostatic charging/discharging (GCD)) were obtained, which is superior to that of the present electrode materials based on 3D graphene/MnO2 hybrid structure (482 F/g). Furthermore, we have also investigated the superior electrochemical performances of an asymmetric supercapacitor device (weight of less than 12 mg/cm(2) and thickness of ~0.8 mm), showing a total capacitance of 0.33 F/cm(2) at a window voltage of 1.8 V and a maximum energy density of 53.4 W h/kg for driving a digital clock for 42 min. These inspiring performances would make our designed supercapacitors become one of the most promising candidates for the future flexible and lightweight energy storage systems. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/24325338/Constructed_uninterrupted_charge_transfer_pathways_in_three_dimensional_micro/nanointerconnected_carbon_based_electrodes_for_high_energy_density_ultralight_flexible_supercapacitors_ L2 - https://dx.doi.org/10.1021/am403760h DB - PRIME DP - Unbound Medicine ER -