• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>NATO Advanced Study Institute on New Trends in Intercalation Compounds for Energy Storage, Sep 22-Oct 2, 2001, Sozopol, Bulgaria >MODIFIED HOST LATTICES FOR Li INTERCALATION WITH IMPROVED ELECTROCHEMICAL PROPERTIES
【24h】

MODIFIED HOST LATTICES FOR Li INTERCALATION WITH IMPROVED ELECTROCHEMICAL PROPERTIES

机译：用于锂嵌入的改进的晶格，具有改善的电化学性能

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

One of the main limitations in the overall performance of Li batteries depends on the intrinsic performances of the material working as a positive electrode. Of course, transition metal oxides are the most studied Li intercalation hosts for the cathode application of rechargeable batteries because most of TM cations can undergo oxidation or reduction without major changes in their coordinence and then without important structural change. Therefore a great number of works have been devoted to the investigation of TM oxides as rechargeable cathodic materials. Two main ways allow to improve the electrochemical properties of such materials: either by preparing new compounds or by modification of already existing materials. This paper deals with results obtained with V_2O_5 and MnO_2 based systems which consist of 2D host lattices modified by incorporation of metallic cations and additional oxygen atoms leading to mixed oxides or by substitution of manganese atoms by divalent or trivalent cations. While in the field of the spinel oxide LiMn_2O_4 various substitution reactions have been applied to enhance the cycle life of the spinel cathode, information about similar attempts in 2D MnO_2 is rather scarce. The present work is organized as follows. First, after some consideration on the attempts for improving or changing the behavior of V_2O_5 cathodes, we will describe and discuss the results obtained on new mixed oxides and bismuth-containing MnO_2 phases. In the second part, we will focus our attention on a new synthesis way which allows to realize a partial substitution of Mn atoms by different metallic cations. We will show that the best results are obtained with a cobalt content of 0.15 Co per mole of oxide in a lamellar host structure. He obtained with a cobalt content of 0.15 Co per mole of oxide in a lamellar host structure.
机译：锂电池整体性能的主要限制之一取决于用作正极的材料的固有性能。当然，对于可再充电电池的阴极应用，过渡金属氧化物是研究最多的Li嵌入主体，因为大多数TM阳离子可以进行氧化或还原，而其配位没有重大变化，然后没有重要的结构变化。因此，许多工作致力于研究作为可再充电阴极材料的TM氧化物。有两种主要方法可以改善此类材料的电化学性能：通过制备新化合物或对现有材料进行改性。本文研究了基于V_2O_5和MnO_2的系统所获得的结果，该系统由2D主晶格组成，这些主晶格通过掺入金属阳离子和其他氧原子而改性，从而导致混合氧化物或通过二价或三价阳离子取代锰原子。尽管在尖晶石氧化物LiMn_2O_4的领域中已经进行了各种取代反应来延长尖晶石阴极的循环寿命，但是关于二维MnO_2中类似尝试的信息却很少。目前的工作安排如下。首先，在考虑了改善或改变V_2O_5阴极性能的尝试后，我们将描述和讨论在新的混合氧化物和含铋MnO_2相上获得的结果。在第二部分中，我们将把注意力集中在一种新的合成方法上，该方法可以实现通过不同的金属阳离子部分取代Mn原子。我们将显示在层状主体结构中每摩尔氧化物钴含量为0.15 Co可获得最佳结果。他在层状主体结构中获得的钴含量为每摩尔氧化物0.15Co。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号