Ultrafine Nb2O5 Nanocrystal Coating on Reduced Graphene Oxide as Anode Material for High Performance Sodium Ion Battery

被引：116

作者：

Yan, Litao ^{[1
]}

Chen, Gen ^{[1
]}

Sarker, Swagotom ^{[1
]}

Richins, Stephanie ^{[1
]}

Wang, Huiqiang ^{[1
,2
]}

Xu, Weichuan ^{[1
]}

Rui, Xianhong ^{[3
]}

Luo, Hongmei ^{[1
]}

机构：

[1] New Mexico State Univ, Dept Chem & Mat Engn, Las Cruces, NM 88003 USA

[2] Agr Univ Hebei, Coll Mech & Elect Engn, Baoding 071001, Peoples R China

[3] Anhui Univ Technol, Sch Energy & Environm, Maanshan 243002, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 34期

基金：

美国国家科学基金会;

关键词：

sodium ion battery; anode; Nb2O5; graphene oxide; ultrafine; HIGH-CAPACITY; RECHARGEABLE LITHIUM; ENERGY-STORAGE; LI+-INTERCALATION; HIGH-POWER; TIO2; COMPOSITE; NANOPARTICLES; CHALLENGES; CATHODE;

D O I：

10.1021/acsami.6b06516

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ultrafine niobium oxide nanocrystals/reduced graphene oxide (Nb2O5 NCs/rGO) was demonstrated as a promising anode material for sodium ion battery with high rate performance and high cycle durability. Nb2O5 NCs/rGO was synthesized by controllable hydrolysis of niobium ethoxide and followed by heat treatment at 450 degrees C in flowing forming gas. Transmission electron microscopy images showed that Nb2O5 NCs with average particle size of 3 nm were uniformly deposited on rGO sheets and voids among Nb2O5 NCs existed. The architecture of ultrafine Nb2O5 NCs anchored on a highly conductive rGO network can not only enhance charge transfer and buffer the volume change during sodiation/desodiation process but also provide more active surface area for sodium ion storage, resulting in superior rate and cycle performance. Ex situ XPS analysis revealed that the sodium ion storage mechanism in Nb2O5 could be accompanied by Nb5+/Nb4+ redox reaction and: the ultrafine Nb2O5 NCs provide more surface area to accomplish the redox reaction.

引用

页码：22213 / 22219

页数：7

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