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Parker一班

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[交流] 大牛Xiulei Ji和Galen Stucky最新锂电力作(Chem Mater,2015年10月24日) 已有2人参与

题目:Nanostructured Mn-Doped V2O5 Cathode Material Fabricated from Layered Vanadium Jarosite

作者:Hongmei Zeng*†‡, Deyu Liu†, Yichi Zhang†, Kimberly A. See†, Young-Si Jun†, Guang Wu†, Jeffrey A. Gerbec⊥, Xiulei Ji¶, Galen D. Stucky*†⊥
           † Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
           ‡ College of Chemistry, Sichuan University, Chengdu, 610064, China
           ⊥ Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, California 93106-5150, United States
           ¶ Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States

摘要:We propose a nanostructured Mn-doped V2O5 lithium-ion battery cathode material that facilitates cathodic charge transport. The synthesis strategy uses a layered compound, vanadium(III) jarosite, as the precursor, in which the Mn2+ ions are doped uniformly between the vanadium oxide crystal layers. Through a two-step transformation, the vanadium jarosite was converted into Mn2+-doped V2O5. The resulting aliovalent doping of the larger Mn cations in the modified V2O5 structure increases the cell volume, which facilitates diffusion of Li+ ions, and introduces oxygen vacancies that improve the electronic conductivity. Comparison of the electrochemical performance in Li-ion batteries of undoped and the Mn2+-doped V2O5 hierarchical structure made from layered vanadium jarosite confirms that the Mn-doping improves ion transport to give a high cathodic columbic capacity (253 mAhg–1 at 1C, 86% of the theoretical value, 294 mAhg–1) and excellent cycling stability.

大牛Xiulei Ji和Galen Stucky最新锂电力作(Chem Mater,2015年10月24日)
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  • 2015-10-23 09:59:28, 304.74 K

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Parker一班

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引用回帖:
2楼: Originally posted by jluzhukai at 2015-10-23 11:29:01
这个文章有些水

怎么说?

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早起的菜鸟有菜吃
3楼2015-10-23 12:22:07
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jluzhukai

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2楼2015-10-23 11:29:01
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jluzhukai

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3楼: Originally posted by Parker一班 at 2015-10-23 12:22:07
怎么说?
...

首先,关于V2O5掺杂已经做了很久,从新意上来说这个文章很一般;其次关于掺杂的结构表征也很少,以及对电化学影响上的证实实验也没有什么,最后这个材料的性能做的很一般,50圈的循环次数,容量也一直在衰减。对于这样的数据。我觉得我来写的话jmca我是不敢投的~我这水平也不行哈,就是瞎说说

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