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Self-assembling synthesis of free-standing nanoporous graphene-transition- metal oxide flexible electrodes for high-performance lithium-ion batteries and supercapacitors

Journal Article


Abstract


  • The synthesis of nanoporous graphene by a convenient carbon nanofiber assisted self-assembly approach is reported. Porous structures with large pore volumes, high surface areas, and well-controlled pore sizes were achieved by employing spherical silica as hard templates with different diameters. Through a general wet-immersion method, transition-metal oxide (Fe3O 4, Co3O4, NiO) nanocrystals can be easily loaded into nanoporous graphene papers to form three-dimensional flexible nanoarchitectures. When directly applied as electrodes in lithium-ion batteries and supercapacitors, the materials exhibited superior electrochemical performances, including an ultra-high specific capacity, an extended long cycle life, and a high rate capability. In particular, nanoporous Fe3O 4-graphene composites can deliver a reversible specific capacity of 1427.5 mAh g-1 at a high current density of 1000 mA g-1 as anode materials in lithium-ion batteries. Furthermore, nanoporous Co 3O4-graphene composites achieved a high supercapacitance of 424.2 F g-1. This work demonstrated that the as-developed freestanding nanoporous graphene papers could have significant potential for energy storage and conversion applications. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2014

Citation


  • Huang, X., Sun, B., Chen, S., & Wang, G. (2014). Self-assembling synthesis of free-standing nanoporous graphene-transition- metal oxide flexible electrodes for high-performance lithium-ion batteries and supercapacitors. Chemistry - An Asian Journal, 9(1), 206-211. doi:10.1002/asia.201301121

Scopus Eid


  • 2-s2.0-84890801140

Start Page


  • 206

End Page


  • 211

Volume


  • 9

Issue


  • 1

Abstract


  • The synthesis of nanoporous graphene by a convenient carbon nanofiber assisted self-assembly approach is reported. Porous structures with large pore volumes, high surface areas, and well-controlled pore sizes were achieved by employing spherical silica as hard templates with different diameters. Through a general wet-immersion method, transition-metal oxide (Fe3O 4, Co3O4, NiO) nanocrystals can be easily loaded into nanoporous graphene papers to form three-dimensional flexible nanoarchitectures. When directly applied as electrodes in lithium-ion batteries and supercapacitors, the materials exhibited superior electrochemical performances, including an ultra-high specific capacity, an extended long cycle life, and a high rate capability. In particular, nanoporous Fe3O 4-graphene composites can deliver a reversible specific capacity of 1427.5 mAh g-1 at a high current density of 1000 mA g-1 as anode materials in lithium-ion batteries. Furthermore, nanoporous Co 3O4-graphene composites achieved a high supercapacitance of 424.2 F g-1. This work demonstrated that the as-developed freestanding nanoporous graphene papers could have significant potential for energy storage and conversion applications. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2014

Citation


  • Huang, X., Sun, B., Chen, S., & Wang, G. (2014). Self-assembling synthesis of free-standing nanoporous graphene-transition- metal oxide flexible electrodes for high-performance lithium-ion batteries and supercapacitors. Chemistry - An Asian Journal, 9(1), 206-211. doi:10.1002/asia.201301121

Scopus Eid


  • 2-s2.0-84890801140

Start Page


  • 206

End Page


  • 211

Volume


  • 9

Issue


  • 1