A Composite of Nb2O5 and MoO2 as a High-Capacity High-Rate Anode Material for Lithium-Ion Batteries

被引：3

作者：

Wheeler-Jones, Evangeline C. ^{[1
]}

Loveridge, Melanie J. ^{[1
]}

Walton, Richard I. ^{[2
]}

机构：

[1] Univ Warwick, Coventry CV4 7AL, England

[2] Univ Warwick, Dept Chem, Coventry CV4 7AL, England

来源：

BATTERIES & SUPERCAPS | 2023年 / 6卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

anode; composite; lithium storage; molybdenum oxide; niobium oxide; TRANSITION-METAL OXIDES; CRYSTAL-STRUCTURE; ELECTRODE MATERIALS; NIOBIUM PENTOXIDE; ENERGY-STORAGE; CHARGE STORAGE; PERFORMANCE; MICROSPHERES; ELECTROCHEMISTRY; MECHANISM;

D O I：

10.1002/batt.202200556

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A composite of Nb2O5 and MoO2 was synthesised using a hydrothermal reaction (225 degrees C) followed by a short heat-treatment step (600 degrees C) to achieve a high-capacity, high-rate anode for lithium-ion battery applications. The composite was shown via powder X-ray diffraction and electron microscopy to be an intimate mix of individual oxide particles rather than an atomically mixed oxide material, and shown by X-ray fluorescence spectroscopy (XRF) to contain a 45 : 55 ratio of Nb : Mo. This material is demonstrated to show notable rate capability in lithium (Li) half-cell cycling and rate tests. When cycled at 100 degrees C the material achieved over 100 mAh g(-1) even after 400 cycles and shows a stable reversible capacity of 514 mAh g(-1) (at 1 C), realising its theoretical capacity. The composite shows electrochemical results comparable to Nb2O5:C composites yet achieves far higher capacities at low-rate due to the MoO2 content.

引用

页数：8

共 69 条

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