阳极
材料科学
电流密度
多孔性
化学工程
纳米结构
锂(药物)
电容感应
锰
电极
纳米技术
电化学
复合材料
冶金
化学
工程类
内分泌学
物理化学
物理
操作系统
医学
量子力学
计算机科学
作者
Wenpei Kang,Denis Y. W. Yu,Wenyue Li,Zhenyu Zhang,Yang Xia,Tsz‐Wai Ng,Rujia Zou,Yiming Tang,Wenjun Zhang,Chun‐Sing Lee
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2015-01-01
卷期号:7 (22): 10146-10151
被引量:56
摘要
In this paper, nanostructured porous MnCO3 spheres are facilely synthesized, which can simultaneously provide an increased surface for conversion reaction and capacitive storage as the anode material for lithium ion batteries. This material gives a superior specific capacity and excellent long-term cycling performance even at a high current density. It can deliver a stable capacity of 1049 mA h g(-1) after 200 cycles at a current density of 1000 mA g(-1), which is much higher than the theoretical capacity of 466 mA h g(-1). After 2000 cycles at a high current density of 5000 mA g(-1), a capacity of 510 mA h g(-1) can still be maintained. Their high rating performance at 5000 mA g(-1) is among the best-reported performances of anode materials. From the in situ or ex situ SEM observation, the porous MnCO3 nanostructure can provide a stable template for reversible lithium insertion and extraction without significant morphology change and accommodate the volume change during the charge-discharge process. Also this structure increases the capacitive contribution to the total capacity compared with other MnCO3 samples.
科研通智能强力驱动
Strongly Powered by AbleSci AI