大牛Xiulei Ji和Galen Stucky最新锂电力作（Chem Mater，2015年10月24日）？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. cm-2015-02840s_0004.gif查看更多1个回答 . 5人已关注
第1天
关注盖德视界
添加小助手
