Graphene-Scaffolded Na3V2(PO4)3 Microsphere Cathode with High Rate Capability and Cycling Stability for Sodium Ion Batteries

被引：175

作者：

Zhang, Jiexin

Fang, Yongjin ^{[1
]}

Xiao, Lifen ^{[2
]}

Qian, Jiangfeng ^{[1
]}

Cao, Yuliang ^{[1
]}

Ai, Xinping ^{[1
]}

Yang, Hanxi ^{[1
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Elect Power Sources, Wuhan 430072, Hunan, Peoples R China

[2] Cent China Normal Univ, Coll Chem, Wuhan 430079, Hunan, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 08期

基金：

美国国家科学基金会;

关键词：

sodium ion batteries; cathode; Na3V2(PO4)(3)/rGO microsphere; graphene; spray-drying synthesis; CARBON-COATED NA3V2(PO4)(3); HIGH-PERFORMANCE CATHODE; SUPERIOR RATE CAPABILITY; ENERGY-STORAGE; ANODE MATERIAL; LOW-COST; LIFE; NANOCOMPOSITES; ELECTRODE; OXIDE;

D O I：

10.1021/acsami.6b16000

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High voltage, high rate, and cycling-stable cathodes are urgently needed for development of commercially viable sodium ion batteries (SIBs). Herein, we report a facile spray-drying method to synthesize graphene-scaffolded Na3V2(PO4)(3) microspheres (NVP@rGO), in which nanocrystalline Na3V2(PO4)(3) is embedded in graphene sheets to form porous microspheres. Benefiting from the highly conductive graphene framework and porous structure, the NVP@rGO material exhibits a high reversible capacity (115 mAh g(-1) at 0.2 C), long-term cycle life (81% of capacity retention up to 3000 cycles at 5 C), and excellent rate performance (44 mAh g(-1) at 50 C). The electrochemical properties of a full Na-ion cell with the NVP@rGO cathode and Sb/C anode are also investigated. The present results suggest promising applications of the NVP@rGO material as a high performance cathode for sodium ion batteries.

引用

页码：7177 / 7184

页数：8

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