• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Evaluation of thin film fuel cells with Zr-rich BaZrxCe0.8?xY0.2O3?δ electrolytes (x ≥ 0.4) fabricated by a single-step reactive sintering method
【24h】

Evaluation of thin film fuel cells with Zr-rich BaZrxCe0.8?xY0.2O3?δ electrolytes (x ≥ 0.4) fabricated by a single-step reactive sintering method

机译：用单步反应烧结法制备的富Zr BaZrxCe0.8？xY0.2O3？δ电解质（x≥0.4）的薄膜燃料电池的评估

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

摘要

This paper reports a survey of power generation characteristics of anode-supported thin film fuel cells with Zr-rich BaZr _( x ) Ce _(0.8? x ) Y _(0.2) O _(3? δ ) ( x = 0.4, 0.6, 0.7, and 0.8) proton-conducting electrolytes, which were fabricated by single step co-firing with Zn(NO _(3) ) _(2) additives at a relatively low temperature (1400 °C). The grain sizes significantly increased to several μm for x = 0.4 and 0.6, whereas the grain sizes remained in the sub-μm ranges for x = 0.7 and 0.8, which resulted in large gaps of the fuel cell performances at x over and below 0.6. The cells for x = 0.4 and 0.6 exhibited efficient power generation, yielding peak powers of 279 and 336 mW cm ~(?2) at 600 °C, respectively, which were higher than those of the corresponding cells previously reported. However, the performances abruptly deteriorated with the increasing x to more than 0.7 because the electrolyte films were highly resistive due to the coarse-grained microstructures. Impedance spectroscopy for the dense sintered BaZr _( x ) Ce _(0.8? x ) Y _(0.2) O _(3? δ ) discs confirmed that the total proton conductivity of BaZr _(0.6) Ce _(0.2) Y _(0.2) O _(3? δ ) was higher than that of BaZr _(0.4) Ce _(0.4) Y _(0.2) O _(3? δ ) at temperatures above 500 °C despite relatively small grain sizes. In addition, BaZr _(0.6) Ce _(0.2) Y _(0.2) O _(3? δ ) cells could gain a stable current throughout a continuous run for a few days under CO _(2) -containing fuel supply, which was due to high fraction of thermodynamically stable BaZrO _(3) matrices. It was demonstrated that BaZr _(0.6) Ce _(0.2) Y _(0.2) O _(3? δ ) is a promising electrolyte for proton-conducting ceramic fuel cells with excellent proton conductivity and CO _(2) tolerance at intermediate temperatures.
机译：本文报告了富Zr的BaZr _（x）Ce _（0.8？x）Y _（0.2）O _（3？δ）（x = 0.4， 0.6、0.7和0.8）质子传导电解质，是通过在相对较低的温度（1400°C）下与Zn（NO _（（3））_（2）添加剂一步共烧制而成的。当x = 0.4和0.6时，晶粒尺寸显着增加到几μm，而对于x = 0.7和0.8，晶粒尺寸保持在亚μm范围内，这导致燃料电池性能在x大于或低于0.6时有较大的差距。 x = 0.4和0.6的电池表现出有效的发电能力，在600°C时分别产生279和336 mW cm〜（？2）的峰值功率，高于先前报道的相应电池的峰值功率。然而，由于电解质膜由于粗晶粒的微观结构而具有高电阻性，因此随着x增加至大于0.7而使性能突然劣化。致密烧结BaZr _（x）Ce _（0.8？x）Y _（0.2）O _（3？δ）圆片的阻抗谱证实，BaZr _（0.6）Ce _（0.2）Y _的总质子传导率尽管晶粒尺寸较小，但在高于500°C的温度下（0.2）O _（3？δ）仍高于BaZr _（0.4）Ce _（0.4）Y _（0.2）O _（3？δ）。另外，BaZr _（0.6）Ce _（0.2）Y _（0.2）O _（3？δ）电池在含CO _（2）的燃料供应下连续运行几天可以获得稳定的电流，这是由于热力学稳定的BaZrO _（3）矩阵的比例很高。结果表明，BaZr _（0.6）Ce _（0.2）Y _（0.2）O _（3δ）是用于质子传导陶瓷燃料电池的有希望的电解质，具有优异的质子传导性和中间的CO _（2）耐受性温度。

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