期刊
MATERIALS CHEMISTRY FRONTIERS
卷 1, 期 8, 页码 1607-1614出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7qm00060j
关键词
-
资金
- National Nature Science Foundation of China [21571073]
- Hubei Provincial Natural Science Foundation of China [2016CFA031]
- Program for HUST Interdisciplinary Innovation Team [2015ZDTD038]
- Fundamental Research Funds for the Central University
GeS with a layered structure is expected to be a promising anode material for lithium ion batteries by the theoretical prediction of its excellent ion intercalation response. However, its experimental investigation is limited because of its low yield and complicated synthesis procedure. In this work, we successfully synthesize pure GeS and its carbon composite on a large scale by a simple and facile ball milling method. When serving as a novel anode material, GeS/C delivers a high reversible capacity of 1768 mA h g(-1) with a high initial coulombic efficiency of 94% for lithium-ion batteries. The ex situ XRD patterns and CV tests confirm that GeS undergoes firstly a conversion reaction followed by an alloying type of lithium storage mechanism, in which the electrochemical performance controlled within the alloying reaction region is very stable and highly reversible, with a low and safe potential of 0.35 V vs. Li+/Li. When further applied in a full cell by coupling commercial LiCoO2 as the cathode, the assembled LiCoO2//GeS full cell can offer a high capacity of 736 mA h g(-1), with a high flat discharge plateau of 3.4 V, showing a high utilization efficiency of the GeS anode. These results demonstrate that the layered GeS is a potential anode for high-energy lithium-ion batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据