煅烧
阳极
材料科学
锂(药物)
纳米颗粒
化学工程
试剂
离子
锰
电化学
多孔性
氧化锰
纳米技术
碳纤维
催化作用
化学
电极
冶金
物理化学
复合材料
复合数
工程类
有机化学
内分泌学
医学
作者
Jie Yue,Xin Gu,Liang Chen,Nana Wang,Xiaolei Jiang,Huayun Xu,Jian Yang,Yitai Qian
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2014-08-27
卷期号:2 (41): 17421-17426
被引量:217
摘要
The use of manganese oxides as promising candidates for anode materials in lithium ion batteries has attracted a significant amount of attention recently. Here, we develop a general approach to synthesize hollow nanospheres of MnO2, Mn3O4 and MnO, using carbon nanospheres as a template and a reagent. Depending on the calcination temperature, time and atmosphere, hollow nanospheres of MnO2 assembled by randomly dispersed nanosheets, or hollow nanospheres of Mn3O4 and MnO composed of aggregated nanoparticles, are produced. The electrochemical properties of the three hollow nanoparticles are investigated in terms of cycling stability and rate capability. They deliver the specific capacities of 840, 1165 or 1515 mA h g−1 after 60 cycles at 100 mA g−1 for MnO2, Mn3O4 and MnO. Even at 500 mA g−1, the reversible capacities could be still kept at 637, 820, and 1050 mA h g−1 after 150 cycles. The outstanding performances might be related with their hollow structure, porous surface and nanoscale size.
科研通智能强力驱动
Strongly Powered by AbleSci AI