Lithium Germanate (Li2GeO3): A High-Performance Anode Material for Lithium-Ion Batteries

被引：37

作者：

Rahman, Md Mokhlesur ^{[1
]}

Sultana, Irin ^{[1
]}

Yang, Tianyu ^{[1
]}

Chen, Zhiqiang ^{[1
]}

Sharma, Neeraj ^{[2
]}

Glushenkov, Alexey M. ^{[1
]}

Chen, Ying ^{[1
]}

机构：

[1] Deakin Univ, Inst Frontier Mat, Geelong Waurn Ponds, Vic 3216, Australia

[2] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 52期

关键词：

anode; germanium; lithium-ion batteries; porous clusters; stable charge capacity; HIGH-CAPACITY; INSERTION ELECTRODE; GRAPHENE COMPOSITE; NANOWIRES; SILICON; STORAGE; NANOCOMPOSITE; PARTICLES; GE; NANOPARTICLES;

D O I：

10.1002/anie.201609343

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A simple, cost-effective, and easily scalable molten salt method for the preparation of Li2GeO3 as a new type of high-performance anode for lithium-ion batteries is reported. The Li2GeO3 exhibits a unique porous architecture consisting of micrometer-sized clusters (secondary particles) composed of numerous nanoparticles (primary particles) and can be used directly without further carbon coating which is a common exercise for most electrode materials. The new anode displays superior cycling stability with a retained charge capacity of 725mAhg(-1) after 300 cycles at 50mAg(-1). The electrode also offers excellent rate capability with a capacity recovery of 810mAhg(-1) (94% retention) after 35 cycles of ascending steps of current in the range of 25-800mAg(-1) and finally back to 25mAg(-1). This work emphasizes the importance of exploring new electrode materials without carbon coating as carbon-coated materials demonstrate several drawbacks in full devices. Therefore, this study provides a method and a new type of anode with high reversibility and long cycle stability.

引用

页码：16059 / 16063

页数：5

共 44 条

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