期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 16, 页码 8636-8642出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta00528k
关键词
-
资金
- 973 project [2015CB251103]
- NSFC [51472104]
- Defense Industrial Technology Development Program [B1420133045]
- National Research Fund for the Doctoral Program of Higher Education of China [20110061130006]
- Development Program of Science and Technology of Jilin Province, China [20140101093JC]
- National Found for Fostering Talents of Basic Science [J1103202]
- China Postdoctoral Science [2014M551174]
A Na3V2(PO4)(3)/C (NVP/C) composite is successfully synthesized by the sol-gel method and examined as the anode material for sodium-ion batteries (SIBs) by means of galvanostatic charge-discharge profiles, cyclic voltammograms, rate performance and cyclic voltammetry comprehensively. The NVP/C electrode delivers a reversible capacity of about 170 mA h g(-1) between 3.0 and 0.01 V at a current density of 20 mA g(-1) corresponding to three sodium ions insertion/extraction processes. Besides the voltage plateau at 1.57 V, another novel working platform at around 0.28 V is found for the first time in both charging and discharging profiles, possibly owing to the further reduction of vanadium. NVP/C exhibits an excellent rate capability and long-cycle stability with a capacity retention of 62% after 3000 cycles at a high charge rate of 10 C (2 A g(-1)). Moreover, the intercalation-type Na-ions storage mechanism is proposed on the basis of ex situ X-ray diffraction and high-resolution transmission electron microscopy. Our findings reveal that the NVP/C sample is a promising anode material for SIBs due to its superior rate capability and long cycle life.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据