Nanocomposite E(PbSnF4;SnF2)@SWCNT - Promising material for fluoride-ion batteries

被引：6
作者：
Zakalyukin, Ruslan M. [1 ,2 ]
Levkevich, Ekaterina A. [1 ,2 ]
Kumskov, Andrey S. [1 ]
机构：
[1] Russian Acad Sci, Fed Sci Res Ctr Crystallog & Photon, Shubnikov Inst Crystallog, Leninskiy Prospekt 59, Moscow 119333, Russia
[2] MIREA Russian Technol Univ, Prospekt Vernadskogo 78, Moscow 119571, Russia
来源：
CERAMICS INTERNATIONAL | 2022年 / 48卷 / 18期
关键词：
Nanocomposites; Carbon nanotubes; Nanocrystals; Twin crystal; Fluoride-ion battery; WALLED CARBON NANOTUBES; SNF2; SINGLE-CRYSTALS; NEUTRON-DIFFRACTION; OPTICAL-PROPERTIES; STANNOUS FLUORIDE; INNER CHANNELS; PBSNF4; ENCAPSULATION; CONDUCTOR; SILVER;
D O I：
10.1016/j.ceramint.2022.05.352
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The channels of single walled carbon nanotubes (SWCNT) were filled with eutectic composition consisting of PbSnF4 and SnF2. The nanocomposite was investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), X-ray energy dispersive (EDX) spectroscopy and Raman spectroscopy. The SnF2 and PbSnF4 nanocrystals form independent regions with disordered atomic region between them inside the SWCNT with a diameter of 20.0(3) angstrom. In the PbSnF4 region there are two separate fragments connected by a twinning plane. Structural models of the PbSnF4 twin nanocrystal and SnF2 nanocrystal inside the nanotube with chilarity (26,0) were constructed and computer modelling of TEM-image of E(PbSnF4;SnF2)@SWCNT nanocomposite was performed. Solid-state FIB with Ce as anode, dispersed E(PbSnF4; SnF2)@SWCNT + SnF2 as a composite-cathode and 95.03%LaF3+4.97%BaF2 electrolyte was investigated by the impedance spectroscopy and cyclic voltammetry. The current density reached similar to 0.6 A/m(2) at 180 degrees C, the open circuit voltage of the pellet at room temperature was 1.9 V.
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收藏
页码：26565 / 26574
页数：10
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