Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage

Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage

Cu<sub>2</sub>Se 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 Cu<sub>2</sub>Se results in poor rate...

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Main Authors: Le Hu, Chaoqun Shang, Eser Metin Akinoglu, Xin Wang, Guofu Zhou
Format: Article
Language:English
Published: MDPI AG 2020-02-01
Series:Nanomaterials
Subjects:
sodium ion batteries
cu<sub>2</sub>se-nc
carbon nanofibers
rate capability
cycling stability
Online Access:https://www.mdpi.com/2079-4991/10/2/302
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spelling doaj-81d1a7305d21451ba11fe0152496aab62020-11-25T03:37:03ZengMDPI AGNanomaterials2079-49912020-02-0110230210.3390/nano10020302nano10020302Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium StorageLe Hu0Chaoqun Shang1Eser Metin Akinoglu2Xin Wang3Guofu Zhou4National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaInternational Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526060, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaCu<sub>2</sub>Se 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 Cu<sub>2</sub>Se results in poor rate performance and cycling stability. To solve this issue, nanosized-Cu<sub>2</sub>Se is encapsulated in 1D nitrogen-doped carbon nanofibers (Cu<sub>2</sub>Se-NC) so that the unique structure of 1D carbon fiber network ensures a high contact area between the electrolyte and Cu<sub>2</sub>Se with a short Na<sup>+</sup> diffusion path and provides a protective matrix to accommodate the volume variation. The kinetic analysis and D<sub>Na+</sub> calculation indicates that the dominant contribution to the capacity is surface pseudocapacitance with fast Na<sup>+</sup> migration, which guarantees the favorable rate performance of Cu<sub>2</sub>Se-NC for SIBs.https://www.mdpi.com/2079-4991/10/2/302sodium ion batteriescu<sub>2</sub>se-nccarbon nanofibersrate capabilitycycling stability
collection DOAJ
language English
format Article
sources DOAJ
author Le Hu
Chaoqun Shang
Eser Metin Akinoglu
Xin Wang
Guofu Zhou
spellingShingle Le Hu
Chaoqun Shang
Eser Metin Akinoglu
Xin Wang
Guofu Zhou
Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage
Nanomaterials
sodium ion batteries
cu<sub>2</sub>se-nc
carbon nanofibers
rate capability
cycling stability
author_facet Le Hu
Chaoqun Shang
Eser Metin Akinoglu
Xin Wang
Guofu Zhou
author_sort Le Hu
title Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage
title_short Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage
title_full Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage
title_fullStr Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage
title_full_unstemmed Cu<sub>2</sub>Se Nanoparticles Encapsulated by Nitrogen-Doped Carbon Nanofibers for Efficient Sodium Storage
title_sort cu<sub>2</sub>se nanoparticles encapsulated by nitrogen-doped carbon nanofibers for efficient sodium storage
publisher MDPI AG
series Nanomaterials
issn 2079-4991
publishDate 2020-02-01
description Cu<sub>2</sub>Se 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 Cu<sub>2</sub>Se results in poor rate performance and cycling stability. To solve this issue, nanosized-Cu<sub>2</sub>Se is encapsulated in 1D nitrogen-doped carbon nanofibers (Cu<sub>2</sub>Se-NC) so that the unique structure of 1D carbon fiber network ensures a high contact area between the electrolyte and Cu<sub>2</sub>Se with a short Na<sup>+</sup> diffusion path and provides a protective matrix to accommodate the volume variation. The kinetic analysis and D<sub>Na+</sub> calculation indicates that the dominant contribution to the capacity is surface pseudocapacitance with fast Na<sup>+</sup> migration, which guarantees the favorable rate performance of Cu<sub>2</sub>Se-NC for SIBs.
topic sodium ion batteries
cu<sub>2</sub>se-nc
carbon nanofibers
rate capability
cycling stability
url https://www.mdpi.com/2079-4991/10/2/302
work_keys_str_mv AT lehu cusub2subsenanoparticlesencapsulatedbynitrogendopedcarbonnanofibersforefficientsodiumstorage
AT chaoqunshang cusub2subsenanoparticlesencapsulatedbynitrogendopedcarbonnanofibersforefficientsodiumstorage
AT esermetinakinoglu cusub2subsenanoparticlesencapsulatedbynitrogendopedcarbonnanofibersforefficientsodiumstorage
AT xinwang cusub2subsenanoparticlesencapsulatedbynitrogendopedcarbonnanofibersforefficientsodiumstorage
AT guofuzhou cusub2subsenanoparticlesencapsulatedbynitrogendopedcarbonnanofibersforefficientsodiumstorage
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