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纳米功能复合氧化物的低热固相制备及机理研究

批准号20161003 学科分类炎症、感染与免疫 ( H1005 )
项目负责人张纪岩 负责人职称 依托单位新疆大学
资助金额0.00
万元
项目类别面上项目 研究期限2002 年 01 月 01 日 至
2004 年 12 月 01 日
中文主题词低热固相反应;复合氧化物;纳米材料
英文主题词low heating solid state reaction;complex oxide;nanometer material

摘要

中文摘要 纳米粉体的制备是纳米材料研究和应用的基础,为了对这类材料的最终特性进行有效的调控掌握各种工艺条件下制备得到的纳米微粒各种特性的变化规律,本课题组拟在前基金课题研究的基础上开展低热固相化学反应制备纳米复合氧化物电池材料,气敏材料,热敏材料的研究,探讨制备条件与材料性能之关系。
英文摘要 nanometer compound oxides,eg. Li-Mn-O compound oxides for Li-ion battery,gas sensitive Zn-Fe-O compound oxides, Zn-Co-O compound oxides, etc.,are one of important functional materials. In this project, precursors were prepared by low heating solid state reaction using different lithium salt (lithium acetate, lithium carbonate), different manganese salt (manganese acetate, manganese carbonate), cobalt acetate, tartaric acid and oxalic acid as starting materials.The relationship between the rate of low heating solid state reaction and the size of particle and thermo-decomposing process of the precursors was studied in depth. The results showed that nano-spinel Li-Mn-O compound oxides can be obtained by calcinating the precursors which were prepared by different reacting system using low heating solid state reaction. The size and micromorphology of compound oxides are related to the rate of low heating solid state reaction and thermo-decomposing process. In addition, Li-Mn-O compound oxides were used as cathode materials for li-ion batteries and its electrochemical performance was studied in detail. The results showed that the Li-Mn-O compound oxides possessed better electrochemical properties, the first discharge capacity of the samples can be up to 122.8mAh/g. The cycle performance of the samples was better. After 80 cycles, the loss of capacity was 6.5%. The study of this project can support the development and apply of new compound oxides for Li-ion battery and gas sensitive materials.
结题摘要 纳米功能复合氧化物如锂离子电池正极材料锂锰氧复合氧化物、气敏锌铁氧、锌钴氧复合氧化物等是一类重要的功能材料。本课题分别以不同锂盐(醋酸锂、碳酸锂),锰盐(醋酸锰、碳酸锰),钴盐(醋酸钴),酒石酸和草酸为原料,采用低热固相化学反应合成了相应的前驱配合物,考查了低热固相化学反应速度对前驱配合物粒径大小的影响及前驱配合物的热分解行为。结果表明:利用低热固相化学反应,采用不同的反应体系制得的前驱配合物,经热分解后均可得到尖晶石型纳米锂锰复合氧化物,且复合氧化物的形貌及粒径大小与低热固相反应速度及前驱配合物的热分解速度密切相关。另外,将所制得的锂锰复合氧化物装配成模拟电池,对其电化学性能进行了系统研究,结果表明合成的样品具有较好的电化学性能,掺杂锂锰复合氧化物其初始容量可达122.8 mAh g-1,经过80周充放电循环,容量仍保持93.5%。该项目研究为新型电池材料纳米复合氧化物、气敏材料等的开发及应用提供了技术支持。

成果

序号 标题 类型 作者
1 吡唑啉酮类光致变色化合物的合成、结构与性质研究 奖励 贾殿赠|刘浪|刘广飞|唐新村|

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