High Rate Capability and Enhanced Cyclability of Na3V2(PO4)2F3 Cathode by In Situ Coating of Carbon Nanofibers for Sodium-Ion Battery Applications

被引：46

作者：

Zhao, Jing ^{[1
]}

Gao, Yu ^{[1
]}

Liu, Qiang ^{[1
]}

Meng, Xing ^{[1
]}

Chen, Nan ^{[1
]}

Wang, Chunzhong ^{[1
]}

Du, Fei ^{[1
]}

Chen, Gang ^{[1
]}

机构：

[1] Jilin Univ, Key Lab Phys & Technol Adv Batteries, Minist Educ, State Key Lab Superhard Mat,Coll Phys, Changchun 130012, Jilin, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2018年 / 24卷 / 12期

关键词：

carbon nanofibers; chemical vapor deposition; electrochemistry; nanostructures; sodium-ion batteries; LIFE-SPAN CATHODE; ENERGY-STORAGE; HIGH-POWER; NANOCOMPOSITE; EXPLORATION; MECHANISM; ELECTRODE;

D O I：

10.1002/chem.201704131

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A facile chemical vapor deposition method is developed for the preparation of carbon nanofiber (CNF) composite Na3V2(PO4)(2)F-3@C as cathodes for sodium-ion batteries. In all materials under investigation, the optimized composite content, denoted as NVPF@C@CNF-5, shows excellent sodium storage performance (86.3% capacity retention over 5000 cycles at 20 C rate) and high rate capability (84.3 mAhg(-1) at 50 C). The superior sodium storage performance benefits from the enhanced electrical conductivity of the working electrode after formation of a composite with CNF. Furthermore, the full cell using NVPF@C@CNF-5 and hard carbon as the cathode and anode, respectively, demonstrates an impressive electrochemical performance, realizing an ultrahigh rate charge/discharge at a current rate of 30 C and long-term stability over 1000 cycles. This approach is facile and effective, and could be extended to other materials for energy-storage applications.

引用

页码：2913 / 2919

页数：7

共 43 条

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