Multifold pressure-induced increase of electric conductivity in LiFe0.75V0.10PO4 glass

被引：9

作者：

Baranowski, Piotr ^{[1
]}

Starzonek, Szymon ^{[2
]}

Drozd-Rzoska, Aleksandra ^{[2
]}

Rzoska, Sylwester J. ^{[2
]}

Bockowski, Michal ^{[2
]}

Keblinski, Pawel ^{[2
,3
]}

Pietrzak, Tomasz K. ^{[1
]}

Garbarczyk, Jerzy E. ^{[1
]}

机构：

[1] Warsaw Univ Technol, Fac Phys, Warsaw, Poland

[2] Polish Acad Sci, Inst High Pressure Phys, Warsaw, Poland

[3] Rensselaer Polytech Inst, Mat Sci & Engn Dept, Troy, NY USA

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

基金：

欧盟地平线“2020”;

关键词：

LITHIUM IRON PHOSPHATE; POSITIVE-ELECTRODE;

D O I：

10.1038/s41598-019-53232-z

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We investigated the impact of high pressure and high-temperature annealing on lithium-vanadiumiron-phosphate (LiFe0.75V0.10PO4) glass materials, proposed for the use in cathodes for high-performance batteries. The treatment was carried out below the glass transition temperature (T-g approximate to 483 degrees C) at P = 1 GPa pressure, in an argon atmosphere. It led to the multifold electrical conductivity increase. Broadband dielectric spectroscopy (BDS) measurements before and after the process revealed the strong DC-conductivity increase across the whole studied frequency range by two orders of magnitude. The phenomenon is explained using Mott's theory of polaron hopping in disordered solids containing transition metal oxides. The pressure evolution of the glass transition temperature and the crystallisation temperature above T-g is shown.

引用

页数：6

共 30 条

[1] New High Capacity Cathode Materials for Rechargeable Li-ion Batteries: Vanadate-Borate Glasses [J].