Tags

Type your tag names separated by a space and hit enter

High Volumetric Energy Density Asymmetric Supercapacitors Based on Well-Balanced Graphene and Graphene-MnO2 Electrodes with Densely Stacked Architectures.
Small. 2016 Oct; 12(37):5217-5227.S

Abstract

The well-matched electrochemical parameters of positive and negative electrodes, such as specific capacitance, rate performance, and cycling stability, are important for obtaining high-performance asymmetric supercapacitors. Herein, a facile and cost-effective strategy is demonstrated for the fabrication of 3D densely stacked graphene (DSG) and graphene-MnO2 (G-MnO2) architectures as the electrode materials for asymmetric supercapacitors (ASCs) by using MnO2 -intercalated graphite oxide (GO-MnO2) as the precursor. DSG has a stacked graphene structure with continuous ion transport network in-between the sheets, resulting in a high volumetric capacitance of 366 F cm-3 , almost 2.5 times than that of reduced graphene oxide, as well as long cycle life (93% capacitance retention after 10 000 cycles). More importantly, almost similar electrochemical properties, such as specific capacitance, rate performance, and cycling stability, are obtained for DSG as the negative electrode and G-MnO2 as the positive electrode. As a result, the assembled ASC delivers both ultrahigh gravimetric and volumetric energy densities of 62.4 Wh kg-1 and 54.4 Wh L-1 (based on total volume of two electrodes) in 1 m Na2 SO4 aqueous electrolyte, respectively, much higher than most of previously reported ASCs in aqueous electrolytes.

Authors+Show Affiliations

Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China. weitong666@163.com.Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China. fanzhj666@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27483052

Citation

Sheng, Lizhi, et al. "High Volumetric Energy Density Asymmetric Supercapacitors Based On Well-Balanced Graphene and Graphene-MnO2 Electrodes With Densely Stacked Architectures." Small (Weinheim an Der Bergstrasse, Germany), vol. 12, no. 37, 2016, pp. 5217-5227.
Sheng L, Jiang L, Wei T, et al. High Volumetric Energy Density Asymmetric Supercapacitors Based on Well-Balanced Graphene and Graphene-MnO2 Electrodes with Densely Stacked Architectures. Small. 2016;12(37):5217-5227.
Sheng, L., Jiang, L., Wei, T., & Fan, Z. (2016). High Volumetric Energy Density Asymmetric Supercapacitors Based on Well-Balanced Graphene and Graphene-MnO2 Electrodes with Densely Stacked Architectures. Small (Weinheim an Der Bergstrasse, Germany), 12(37), 5217-5227. https://doi.org/10.1002/smll.201601722
Sheng L, et al. High Volumetric Energy Density Asymmetric Supercapacitors Based On Well-Balanced Graphene and Graphene-MnO2 Electrodes With Densely Stacked Architectures. Small. 2016;12(37):5217-5227. PubMed PMID: 27483052.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High Volumetric Energy Density Asymmetric Supercapacitors Based on Well-Balanced Graphene and Graphene-MnO2 Electrodes with Densely Stacked Architectures. AU - Sheng,Lizhi, AU - Jiang,Lili, AU - Wei,Tong, AU - Fan,Zhuangjun, Y1 - 2016/08/02/ PY - 2016/05/23/received PY - 2016/06/12/revised PY - 2016/8/3/pubmed PY - 2016/8/3/medline PY - 2016/8/3/entrez KW - graphene KW - high volumetric energy density KW - supercapacitors SP - 5217 EP - 5227 JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 12 IS - 37 N2 - The well-matched electrochemical parameters of positive and negative electrodes, such as specific capacitance, rate performance, and cycling stability, are important for obtaining high-performance asymmetric supercapacitors. Herein, a facile and cost-effective strategy is demonstrated for the fabrication of 3D densely stacked graphene (DSG) and graphene-MnO2 (G-MnO2) architectures as the electrode materials for asymmetric supercapacitors (ASCs) by using MnO2 -intercalated graphite oxide (GO-MnO2) as the precursor. DSG has a stacked graphene structure with continuous ion transport network in-between the sheets, resulting in a high volumetric capacitance of 366 F cm-3 , almost 2.5 times than that of reduced graphene oxide, as well as long cycle life (93% capacitance retention after 10 000 cycles). More importantly, almost similar electrochemical properties, such as specific capacitance, rate performance, and cycling stability, are obtained for DSG as the negative electrode and G-MnO2 as the positive electrode. As a result, the assembled ASC delivers both ultrahigh gravimetric and volumetric energy densities of 62.4 Wh kg-1 and 54.4 Wh L-1 (based on total volume of two electrodes) in 1 m Na2 SO4 aqueous electrolyte, respectively, much higher than most of previously reported ASCs in aqueous electrolytes. SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/27483052/High_Volumetric_Energy_Density_Asymmetric_Supercapacitors_Based_on_Well_Balanced_Graphene_and_Graphene_MnO2_Electrodes_with_Densely_Stacked_Architectures_ L2 - https://doi.org/10.1002/smll.201601722 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.