A layered oxalatophosphate framework as a cathode material for Li-ion batteries

被引：69

作者：

Hameed, A. Shahul ^{[1
]}

Nagarathinam, Mangayarkarasi ^{[1
]}

Schreyer, Martin ^{[2
]}

Reddy, M. V. ^{[3
]}

Chowdari, B. V. R. ^{[3
]}

Vittal, Jagadese J. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

[2] Inst Chem & Engn Sci, Singapore 627833, Singapore

[3] Natl Univ Singapore, Dept Phys, Singapore 117551, Singapore

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 18期

关键词：

LITHIUM VANADIUM FLUOROPHOSPHATE; POWDER DIFFRACTION; REFINEMENT; PARAMETERS; ELECTRODE;

D O I：

10.1039/c3ta10464h

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：

A new lithium containing hybrid inorganic-organic open framework material, Li-2(VO)(2)(HPO4)(2)(C2O4), has been synthesized and its reversible lithium storage has been investigated. Firstly, the hydrated phase Li-2(VO)(2)(HPO4)(2)(C2O4)center dot 6H(2)O (1) was obtained via a hydrothermal route at 120 degrees C which on dehydration yielded the anhydrous phase. The crystal structure of 1 was solved and refined from its powder X-ray diffraction data and optimized by DFT calculations. The presence of extractable lithium ions in the inter-layer space together with the feasibility of the V4+/5+ redox couple make this compound suitable for cathode applications in Li-ion batteries. Electrochemical properties of this material were studied using galvanostatic charge-discharge cycling, cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and ex situ XRD studies. The material exhibits reversible lithium insertion/extraction during cycling.

引用

页码：5721 / 5726

页数：6

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