材料科学
纳米棒
阳极
电化学
锰
化学工程
锂(药物)
纳米颗粒
无机化学
电极
纳米技术
化学
冶金
内分泌学
物理化学
工程类
医学
作者
Ming Zhong,Dachi Yang,Chen-Chao Xie,Zhang Zhang,Xian‐He Bu
出处
期刊:Small
[Wiley]
日期:2016-08-26
卷期号:12 (40): 5564-5571
被引量:130
标识
DOI:10.1002/smll.201601959
摘要
Manganese oxides (MnOx ) are promising anode materials for lithium ion batteries, but they generally exhibit mediocre performances due to intrinsic low ionic conductivity, high polarization, and poor stability. Herein, yolk-shell nanorods comprising of nitrogen-doped carbon (N-C) coating on manganese monoxide (MnO) coupled with zinc manganate (ZnMn2 O4 ) nanoparticles are manufactured via one-step carbonization of α-MnO2 /ZIF-8 precursors. When evaluated as anodes for lithium ion batteries, MnO@ZnMn2 O4 /N-C exhibits an reversible capacity of 803 mAh g-1 at 50 mA g-1 after 100 cycles, excellent cyclability with a capacity of 595 mAh g-1 at 1000 mAg-1 after 200 cycles, as well as better rate capability compared with those non-N-C shelled manganese oxides (MnOx ). The outstanding electrochemical performance is attributed to the unique yolk-shell nanorod structure, the coating effect of N-C and nanoscale size.
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