Next Article in Journal
Facile Preparation of Stable Solid-State Carbon Quantum Dots with Multi-Peak Emission
Previous Article in Journal
Evaluation of Acetaminophen Release from Biodegradable Poly (Vinyl Alcohol) (PVA) and Nanocellulose Films Using a Multiphase Release Mechanism
Previous Article in Special Issue
Binder-Free Nickel Oxide Lamellar Layer Anchored CoOx Nanoparticles on Nickel Foam for Supercapacitor Electrodes
Open AccessArticle

Cu2Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage

by Le Hu 1,†, Chaoqun Shang 1,*,†, Eser Metin Akinoglu 2, Xin Wang 1,2,* and Guofu Zhou 1,2
1
National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China
2
International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2020, 10(2), 302; https://doi.org/10.3390/nano10020302
Received: 13 January 2020 / Revised: 4 February 2020 / Accepted: 7 February 2020 / Published: 10 February 2020
(This article belongs to the Special Issue Design and Synthesis of Nanomaterials for Energy Storage)
Cu2Se with high theoretical capacity and good electronic conductivity have attracted particular attention as anode materials for sodium ion batteries (SIBs). However, during electrochemical reactions, the large volume change of Cu2Se results in poor rate performance and cycling stability. To solve this issue, nanosized-Cu2Se is encapsulated in 1D nitrogen-doped carbon nanofibers (Cu2Se-NC) so that the unique structure of 1D carbon fiber network ensures a high contact area between the electrolyte and Cu2Se with a short Na+ diffusion path and provides a protective matrix to accommodate the volume variation. The kinetic analysis and DNa+ calculation indicates that the dominant contribution to the capacity is surface pseudocapacitance with fast Na+ migration, which guarantees the favorable rate performance of Cu2Se-NC for SIBs.
Keywords: sodium ion batteries; Cu2Se-NC; carbon nanofibers; rate capability; cycling stability sodium ion batteries; Cu2Se-NC; carbon nanofibers; rate capability; cycling stability
MDPI and ACS Style

Hu, L.; Shang, C.; Akinoglu, E.M.; Wang, X.; Zhou, G. Cu2Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage. Nanomaterials 2020, 10, 302.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop