High-Conductivity Reduced-Graphene-Oxide/Copper Aerogel for Energy Storage

Zhao, JieUppsala universitet,Fasta tillståndets elektronik,Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an (författare)

This work reports a room-temperature, solution-phase and one-pot method for macro-assembly of a three-dimensional (3D) reduced-graphene-oxide/copper hybrid hydrogel. The hydrogel is subsequently transformed into a highly conductive aerogel via freeze-drying. The aerogel, featuring reduced graphene oxide (rGO) networks decorated with Cu and CuxO nanoparticles (Cu/CuxO@rGO), exhibits a specific surface area of 48 m2/g and an apparent electrical conductivity of ∼33 and ∼430 S/m prior to and after mechanical compression, respectively. The compressed Cu/CuxO@rGO aerogel delivers a specific capacity of ∼453 mAh g−1 at a current density of 1 A/g and ∼184 mAh g−1 at 50 A/g in a 3 M KOH aqueous electrolyte evidenced by electrochemical measurements. Galvanostatic cycling tests at 5 A/g demonstrates that the Cu/CuxO@rGO aerogel retains 38% (∼129 mAh g−1) of the initial capacity (∼339 mAh g−1) after 500 cycles. The straightforward manufacturing process and the promising electrochemical performances make the Cu/CuxO@rGO aerogel an attractive electrode candidate in energy storage applications.

Pan, RuijunUppsala universitet,Oorganisk kemi(Swepub:uu)ruipa292 (författare)
Sun, RuiUppsala universitet,Nanoteknologi och funktionella material(Swepub:uu)ruisu228 (författare)
Wen, ChenyuUppsala universitet,Fasta tillståndets elektronik(Swepub:uu)chewe730 (författare)
Zhang, Shi-LiUppsala universitet,Fasta tillståndets elektronik(Swepub:uu)shizh725 (författare)
Wu, Biao (författare)
Nyholm, Leif,1961-Uppsala universitet,Oorganisk kemi(Swepub:uu)lny18455 (författare)
Zhang, Zhi-BinUppsala universitet,Fasta tillståndets elektronik(Swepub:uu)zhizh813 (författare)
Uppsala universitetFasta tillståndets elektronik (creator_code:org_t)

Av författaren/redakt...: Zhao, Jie; Pan, Ruijun; Sun, Rui; Wen, Chenyu; Zhang, Shi-Li; Wu, Biao; visa fler...; Nyholm, Leif, 19 ...; Zhang, Zhi-Bin; visa färre...

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