Niobium(V) Oxynitride: Synthesis, Characterization, and Feasibility as Anode Material for Rechargeable Lithium-Ion Batteries

被引：21

作者：

Wang, Xiao-Jun ^{[1
]}

Krumeich, Frank ^{[1
]}

Woerle, Michael ^{[1
]}

Nesper, Reinhard ^{[1
]}

Jantsky, Laurent ^{[2
]}

Fjellvag, Helmer ^{[2
]}

机构：

[1] ETH, Inorgan Chem Lab, CH-8093 Zurich, Switzerland

[2] Univ Oslo, Dept Chem, Ctr Mat Sci & Nanotechnol, FERMiO, N-0349 Oslo, Norway

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2012年 / 18卷 / 19期

关键词：

electrochemistry; nanoparticles; niobium; oxynitrides; solid-state reactions; TRANSITION-METAL NITRIDE; LI-ION; ELECTRODE MATERIALS; NEGATIVE ELECTRODE; STRUCTURAL-CHANGE; O-N; TAON; DEINTERCALATION; PERFORMANCE; CAPACITY;

D O I：

10.1002/chem.201102653

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The decomposition reaction of niobium(V) oxytrichloride ammoniate to the oxynitride of niobium in the 5+ oxidation state was developed in a methodological way. By combining elemental analysis, Rietveld refinements of X-ray and neutron diffraction data, SEM and TEM, the sample compound was identified as approximately 5 nm-diameter particles of NbO1.3(1)N0.7(1) crystallizing with baddeleyite-type structure. The thermal stability of this compound was studied in detail by thermogravimetric/differential thermal analysis and temperature-dependent X-ray diffraction. Moreover, the electrochemical uptake and release by the galvanostatic cycling method of pure and carbon-coated NbO1.3(1)N0.7(1) versus lithium was investigated as an example of an Li-free transition-metal oxynitride. The results showed that reversible capacities as high as 250 and 80 A?h?kg-1 can be reached in voltage ranges of 0.053 and 13 V, respectively. Furthermore, a plausible mechanism for the chargedischarge reaction is proposed.

引用

页码：5970 / 5978

页数：9

共 37 条

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