High-rate intercalation capability of NaTi2(PO4)3/C composite in aqueous lithium and sodium nitrate solutions

被引：65
作者：
Vujkovic, Milica [1 ]
Mitric, Miodrag [2 ]
Mentus, Slavko [1 ,3 ]
机构：
[1] Univ Belgrade, Fac Phys Chem, Belgrade 11158, Serbia
[2] Univ Belgrade, Vinca Inst Nucl Sci, Lab Theoret & Condensed Matter Phys, Vinca 11001, Serbia
[3] Serbian Acad Arts & Sci, Belgrade 11000, Serbia
来源：
JOURNAL OF POWER SOURCES | 2015年 / 288卷
关键词：
Aqueous electrolyte; Gel-combustion synthesis; Nasicon; NaTi2(PO4)(3)/C composite; Sodium-ion batteries; NA-ION BATTERIES; ENERGY-STORAGE; TITANIUM PHOSPHATES; ELECTROCHEMICAL PROPERTIES; NEUTRON-DIFFRACTION; CARBON NANOTUBES; VANADIUM-OXIDE; TIO2; ANATASE; HIGH-POWER; LOW-COST;
D O I：
10.1016/j.jpowsour.2015.04.132
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 nanodispersed NaTi2(PO4)(3)/C composite containing 20-25 wt.% of in-situ formed carbon, was synthesized by gel combustion procedure followed by a heat treatment at 650, 700 and 750 degrees C. The samples calcined at 700 and 750 degrees C displayed crystalline nasicon structure. They were subjected to the investigation of intercalation/deintercalation kinetics in aqueous NaNO3 and LiNO3 solutions, using cyclic voltammetry and galvanostatic charging/discharging measurements. As regards to the effect of electrolyte composition, the reactions were evidenced to be roughly twice faster in sodium nitrate than in lithium nitrate solution. Among the samples treated at 700 and 750 degrees C, better performance was evidenced for the sample treated at lower temperature. Coulombic capacity in NaNO3 solution at charging rate 1C amounted to similar to 70 mAh g(-1) and similar to 55 mAh g(-1) for the sample calcined at 700 and 750 degrees C, respectively, and displayed surprisingly slight dependence on charging rate up to even 100C. (c) 2015 Elsevier B.V. All rights reserved.
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页码：176 / 186
页数：11
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