Ordered-mesoporous Nb2O5/carbon composite as a sodium insertion material

被引：132

作者：

Kim, Haegyeom ^{[1
]}

Lim, Eunho ^{[2
]}

Jo, Changshin ^{[3
]}

Yoon, Gabin ^{[1
,4
]}

Hwang, Jongkook ^{[3
]}

Jeong, Sanha ^{[3
]}

Lee, Jinwoo ^{[2
,3
]}

Kang, Kisuk ^{[1
,4
]}

机构：

[1] Seoul Natl Univ, Res Inst Adv Mat, Dept Mat Sci & Engn, Seoul 151742, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Sch Environm Sci & Engn, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

[4] Seoul Natl Univ, Inst Basic Sci, Ctr Nanoparticle Res, Seoul 151742, South Korea

来源：

NANO ENERGY | 2015年 / 16卷

基金：

新加坡国家研究基金会;

关键词：

Mesoporous; Nb2O5; Intercalation compounds; Electrode; Sodium ion batteries; ELECTROCHEMICAL ENERGY-STORAGE; TRANSITION-METAL OXIDES; HARD CARBON ANODES; HIGH-CAPACITY; ION BATTERIES; RATE CAPABILITY; ELECTRODE MATERIALS; NEGATIVE ELECTRODE; CYCLING STABILITY; GRAPHENE OXIDE;

D O I：

10.1016/j.nanoen.2015.05.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present work introduces a new intercalation host for the Na ions, Nb2O5, and proposes that a mesoporous Nb2O5/carbon composite can function as a promising sodium insertion material. The highly ordered mesoporous Nb2O5/carbon electrode, synthesized using a block copolymer-assisted one-pot method, demonstrated not only a stable cycle life, but also outstanding rate capability. The excellent Na storage properties of the Nb2O5/carbon electrode were due to the uniquely ordered mesoporous nanostructure and in situ carbon formation whose configuration provided a large electrode-electrolyte interface area and enhanced Na ion and electron transport. Ex situ analyses revealed that Nb2O5 stores Na ions through Na de/intercalation reactions combined with surface capacitive reactions, after the activation process during the first sodiation. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：62 / 70

页数：9

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