文档介绍：MnO/C core–shell nanorods as high capacity anode materials for lithium-ion batteries
Journal of Power Sources
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Four parts
1. Introduction
2. Experiment
3. Results and discussion
4. Conclusions
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Introduction
transition metal oxides have attracted great attention as anode materials for lithium ion batteries, due to
1 their high theoretical capacity
2 safety
3 low cost
4 natural abundance
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Some obstacle
1 poor cycling performance (large volume expansion due to the generation of Li2O)
2 poor electronic conductivity (electrode materials with designed nanostructure can improve it)
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MnO shows relatively low electromotive force电动势 (emf) value ( V vs. Li+/Li) and high density ( g cm−3) . However, this kind of material has seldom been reported as an anode material
nanocrystalline MnO thin film, and MnO powder as anode has shown low overpotential超电势 and good cycling performance
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In this paper
The prepared MnO/C core–shell nanorods much higher specific capacity than that of MnO microparticles and MnO2 nanowires as anode material of lithium ion battery.
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Experiment
合成部分
MnO/C core–shell nanorods were synthesized by the reduction of carbon precursor coated MnO2 nanowires.
The MnO2 nanowires were synthesized by a typical hydrothermal reaction
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Experiment
表征
X-ray diffraction
Field emission scanning electron microscopy (FESEM ）
transmission electron microscopy(TEM)
SAED
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Experiment
电化学实验部分
performing using 2032 coin-type cells assembled in an argon-filled glove box
slurry :active materials (70 wt%), acetylene black乙炔黑 (20 wt%), and polyvinylidene fluoride 聚偏二***乙烯(PVDF 10 wt%) in N-methyl-2-pyrrolidone 氮***二吡咯烷***(NMP).
The slurry was spread onto the Cu foil with a doctor blade刮墨刀片 and dried at 120 °C overnight under vacuum
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Experiment
electrode area is 1 cm2
loading of active material is – mg cm−2
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