• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced energy materials >A New P2-Type Layered Oxide Cathode with Extremely High Energy Density for Sodium-Ion Batteries
【24h】

A New P2-Type Layered Oxide Cathode with Extremely High Energy Density for Sodium-Ion Batteries

机译：一种新的P2型分层阴极，具有极高的能量密度的钠离子电池

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

Herein, a new P2-type layered oxide is proposed as an outstanding intercalation cathode material for high energy density sodium-ion batteries (SIBs). On the basis of the stoichiometry of sodium and transition metals, the P2-type Na-0.55[Ni0.1Fe0.1Mn0.8]O-2 cathode is synthesized without impurities phase by partially substituting Ni and Fe into the Mn sites. The partial substitution results in a smoothing of the electrochemical charge/discharge profiles and thus greatly improves the battery performance. The P2-type Na-0.55[Ni0.1Fe0.1Mn0.8]O-2 cathode delivers an extremely high discharge capacity of 221.5 mAh g(-1) with a high average potential of approximate to 2.9 V (vs Na/Na+) for SIBs. In addition, the fast Na-ion transport in the P2-type Na-0.55[Ni0.1Fe0.1Mn0.8]O-2 cathode structure enables good power capability with an extremely high current density of 2400 mA g(-1) (full charge/discharge in 12 min) and long-term cycling stability with approximate to 80% capacity retention after 500 cycles at 600 mA g(-1). A combination of electrochemical profiles, in operando synchrotron X-ray diffraction analysis, and first-principles calculations are used to understand the overall Na storage mechanism of P2-type Na-0.55[Ni0.1Fe0.1Mn0.8]O-2.
机译：这里，提出了一种新的P2型分层氧化物作为高能量密度钠离子电池（SIBS）的优异插入阴极材料。基于钠和过渡金属的化学计量，通过将Ni和Fe部分地将Ni和Fe分成Mn位点，合成P2型Na-0.55 [Ni0.1Fe0.1Mn0.8] O-2阴极。部分取代导致电化学电荷/放电轮廓的平滑，从而大大提高了电池性能。 P2型Na-0.55 [Ni0.1fe0.1Mn0.8] O-2阴极可提供221.5mAhg（-1）的极高放电容量，高平均潜力约为2.9 V（Vs Na / Na +）对于sibs。此外，P2型Na-0.55 [Ni0.1Fe0.1Mn0.8] O-2阴极结构中的快速Na离子传输能够具有2400mA G（-1）的极高电流密度的良好功率能力（在12分钟内完全充电/放电），长期循环稳定性，500 mA g（-1）下500次循环后的容量保持近似为80％。电化学谱的组合，在Operando同步rotron X射线衍射分析和第一原理计算中用于了解P2型Na-0.55 [Ni0.1Fe0.1Mn0.8] O-2的整体Na储存机理。

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