• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >The Electrochemical Performances of Zn-Al-Hydrotalcites in Zn-Ni Secondary Batteries
【24h】

The Electrochemical Performances of Zn-Al-Hydrotalcites in Zn-Ni Secondary Batteries

机译：Zn-Ni二次电池中Zn-Al-水滑石的电化学性能

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Zn-Al-hydrotalcites (Zn-Al-LDHs) are successfully synthesized by a hydrothermal method and a coprecipitation method and are investigated as negative electrode materials for Zn-Ni batteries. Scanningelectron microscope (SEM) images, X-ray diffraction (XRD) patterns and laser scattering particleanalysis show that the as-prepared sample is flaky in structure and well-crystallized, and the particlesizes are approximately 20-40 μm. The electrochemical performances of Zn-Al-LDHs determined bydifferent methods are investigated by potentiodynamic polarization, electrochemical impedancespectroscopy (EIS) and galvanostatic charge/discharge measurements. Compared with pure ZnOpowders, Zn-Al-LDHs have good anticorrosion ability. The lower charge platform (1.86 V) and higherdischarge platform (1.71 V) of Zn-Al-LDHs indicate that they have better charge/discharge performanceas negative active materials for Zn-Ni batteries. These findings show excellent cycle stability in the 40thcycle, with the capacity retention ratio of 81.4% and cycle effciency of approximately 90%, which aremuch higher than those of pure ZnO (44%).
机译：通过水热法和共沉淀法成功地合成了Zn-Al-水滑石（Zn-Al-LDHs），并被研究用作Zn-Ni电池的负极材料。扫描电子显微镜（SEM）图像，X射线衍射（XRD）图谱和激光散射颗粒分析表明，所制备的样品呈片状结构且结晶良好，颗粒尺寸约为20-40μm。通过电位动力学极化，电化学阻抗谱（EIS）和恒电流充放电测量，研究了通过不同方法测定的Zn-Al-LDHs的电化学性能。与纯ZnO粉相比，Zn-Al-LDHs具有良好的防腐能力。 Zn-Al-LDHs的较低充电平台（1.86 V）和较高放电平台（1.71 V）表明，它们作为Zn-Ni电池负极活性材料具有更好的充电/放电性能。这些发现表明在第40个循环中具有出色的循环稳定性，容量保持率为81.4％，循环效率约为90％，远高于纯ZnO（44％）。

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