On the Capacities of Freestanding Vanadium Pentoxide-Carbon Nanotube-Nanocellulose Paper Electrodes for Charge Storage Applications

Etman, AhmedLinköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Alexandria Univ, Egypt (författare)

Funding Agencies|Swedish Foundation for Strategic Research (SSF)Swedish Foundation for Strategic Research [EM16-0004]; Knut and Alice Wallenberg (KAW) FoundationKnut & Alice Wallenberg Foundation; Swedish Research CouncilSwedish Research Council [VR-2019-03492]
Herein, a one-step protocol for synthesizing freestanding 20 mu m thick cellulose paper electrodes composed of V2O5 . H2O nanosheets (VOx), carbon nanotubes (CNTs), and Cladophora cellulose (CC) is reported. In 1.0 m Na2SO4, the VOx-CNT-CC electrodes deliver capacities of about 200 and 50 C g(-1) at scan rates of 20 and 500 mV s(-1), respectively. The obtained capacities are compared with the theoretical capacities and are discussed based on the electrochemical reactions and the mass loadings of the electrodes. It is shown that the capacities are diffusion rate limited and, consequently, depend on the distribution and thickness of the V2O5 . H2O nanosheets, whereas the long-term cycling stabilities depend on vanadium species dissolving in the electrolyte. The electrodes feature high mass loadings (2 mg cm(-2)), good rate performances (25% capacity retention at 500 mV s(-1)), and capacity retentions of 85% after 8000 cycles. A symmetric VOx-CNT-CC energy storage device with a potential window of about 1 V exhibits a capacity of 40 C g(-1) at a scan rate of 2 mV s(-1).

Wang, ZhaohuiUppsala universitet,Oorganisk kemi,Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China.,Uppsala Univ, Sweden; Hunan Univ, Peoples R China(Swepub:uu)zhawa910 (författare)
Yuan, YouyouPeking Univ, Coll Chem & Mol Engn, Yiheyuan Rd 5, Beijing 100871, Peoples R China. (författare)
Nyholm, Leif,1961-Uppsala universitet,Oorganisk kemi,Uppsala Univ, Sweden(Swepub:uu)lny18455 (författare)
Rosén, JohannaLinköpings universitet,Tunnfilmsfysik,Tekniska fakulteten(Swepub:liu)johro07 (författare)
Linköpings universitetTunnfilmsfysik (creator_code:org_t)

Av författaren/redakt...: Etman, Ahmed; Wang, Zhaohui; Yuan, Youyou; Nyholm, Leif, 19 ...; Rosén, Johanna

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Energiteknik

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