NDLI: Fabrication of a 3D MnO<sub>2</sub>/graphene hydrogel for high-performance asymmetric supercapacitors

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Wufeng Wu, Shanshan Yan, Lifeng
Copyright Year	2014
Abstract	A three-dimensional hydrogel of graphene and MnO2 nanoparticles has been prepared by a two-step synthesis. At first, nanoparticles of MnO2 were grown onto both surfaces of nanosheets of graphene oxide with the aid of benzyl alcohol in an aqueous suspension, and then the composite hydrogel of reduced graphene oxide (rGO) and MnO2 was prepared by a reduction-induced in situ self-assembly. Then, asymmetric supercapacitors with high energy and power densities were fabricated using the MnO2/rGO hydrogel as the positive electrode and a pure rGO hydrogel as the negative electrode in a neutral aqueous Na2SO4 (1.0 M) electrolyte. The asymmetric supercapacitor exhibited a high performance with an energy density of 21.2 W h kg−1 and a power density of 0.82 kW kg−1, and it can be cycled reversibly in a wide potential window of 1.6 V (0–1.6 V). The asymmetric supercapacitor also exhibited stable cycling performance with 89.6% capacitance after 1000 cycles. This work provides a new method for the preparation of a metal oxide/graphene hydrogel-based asymmetric supercapacitor free of polymer binders and conducting additives.
Starting Page	2765
Ending Page	2772
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	2
Issue Number	8
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta14387b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Gel Graphene Benzyl alcohol Self-assembly Electrode Electrolyte Supercapacitor Energy density Capacitance Polymer
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Solid-state, high-performance supercapacitor using graphene nanoribbons embedded with zinc manganite

A high energy density all-solid-state asymmetric supercapacitor based on MoS₂/graphene nanosheets and MnO₂/graphene hybrid electrodes

Synthesis of peanut-like hierarchical manganese carbonate microcrystals via magnetically driven self-assembly for high performance asymmetric supercapacitors

High-performance flexible asymmetric supercapacitors based on 3D porous graphene/MnO₂ nanorod and graphene/Ag hybrid thin-film electrodes

Heterogeneous, mesoporous NiCo₂O₄–MnO₂/graphene foam for asymmetric supercapacitors with ultrahigh specific energies

Electroactive edge site-enriched nickel–cobalt sulfide into graphene frameworks for high-performance asymmetric supercapacitors

Low-cost high-performance asymmetric supercapacitors based on Co₂AlO₄@MnO₂ nanosheets and Fe₃O₄ nanoflakes

Graphene oxide self-assembled with a cationic fullerene for high performance pseudo-capacitors

MnO₂ nanoflowers and polyaniline nanoribbons grown on hybrid graphene/Ni 3D scaffolds by in situ electrochemical techniques for high-performance asymmetric supercapacitors

Fabrication of a 3D MnO₂/graphene hydrogel for high-performance asymmetric supercapacitors

Similar Documents

Solid-state, high-performance supercapacitor using graphene nanoribbons embedded with zinc manganite

A high energy density all-solid-state asymmetric supercapacitor based on MoS2/graphene nanosheets and MnO2/graphene hybrid electrodes

Synthesis of peanut-like hierarchical manganese carbonate microcrystals via magnetically driven self-assembly for high performance asymmetric supercapacitors

High-performance flexible asymmetric supercapacitors based on 3D porous graphene/MnO2 nanorod and graphene/Ag hybrid thin-film electrodes

Heterogeneous, mesoporous NiCo2O4–MnO2/graphene foam for asymmetric supercapacitors with ultrahigh specific energies

Electroactive edge site-enriched nickel–cobalt sulfide into graphene frameworks for high-performance asymmetric supercapacitors

Low-cost high-performance asymmetric supercapacitors based on Co2AlO4@MnO2 nanosheets and Fe3O4 nanoflakes

Graphene oxide self-assembled with a cationic fullerene for high performance pseudo-capacitors

MnO2 nanoflowers and polyaniline nanoribbons grown on hybrid graphene/Ni 3D scaffolds by in situ electrochemical techniques for high-performance asymmetric supercapacitors

Fabrication of a 3D MnO2/graphene hydrogel for high-performance asymmetric supercapacitors

A high energy density all-solid-state asymmetric supercapacitor based on MoS₂/graphene nanosheets and MnO₂/graphene hybrid electrodes

High-performance flexible asymmetric supercapacitors based on 3D porous graphene/MnO₂ nanorod and graphene/Ag hybrid thin-film electrodes

Heterogeneous, mesoporous NiCo₂O₄–MnO₂/graphene foam for asymmetric supercapacitors with ultrahigh specific energies

Low-cost high-performance asymmetric supercapacitors based on Co₂AlO₄@MnO₂ nanosheets and Fe₃O₄ nanoflakes

MnO₂ nanoflowers and polyaniline nanoribbons grown on hybrid graphene/Ni 3D scaffolds by in situ electrochemical techniques for high-performance asymmetric supercapacitors

Fabrication of a 3D MnO₂/graphene hydrogel for high-performance asymmetric supercapacitors