Ca2+/Pr3+共掺Ce0.8Sm0.2O2-δ电解质的制备及其离子导电性能研究

梁佳敏; 徐梦姣; 黄岭; 潘晓剑; 彭永利

doi:10.13568/j.cnki.651094.651316.2024.02.19.0001

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Ca²⁺/Pr³⁺共掺Ce_0.8Sm_0.2O_2-δ电解质的制备及其离子导电性能研究

化学与化工 | 更新时间：2026-01-21

- Ca²⁺/Pr³⁺共掺Ce_0.8Sm_0.2O_2-δ电解质的制备及其离子导电性能研究
- Ca²⁺/Pr³⁺共掺Ce_0.8Sm_0.2O_2-δ电解质的制备及其离子导电性能研究
- 新疆大学学报（自然科学版中英文） 2024年41卷第6期页码：657-664
- 作者机构：
  
  新疆大学化学学院省部共建碳基能源资源化学与利用国家重点实验室
- 作者简介：
- 基金信息：
  
  国家重点研发计划“非电行业复杂工况烟气深度净化稀土脱硝催化剂研发及应用”（2021YFB3500600）;新疆维吾尔自治区自然科学基金“二元铋基/碳纤维复合材料的制备及其光催化性能研究”（2022D01C72）
- DOI：10.13568/j.cnki.651094.651316.2024.02.19.0001
  中图分类号： TQ133.3;TM911.4
- 纸质出版：2024
- 稿件说明：
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[1]梁佳敏,徐梦姣,黄岭,等.Ca~(2+)/Pr~(3+)共掺Ce_(0.8)Sm_(0.2)O_(2-δ)电解质的制备及其离子导电性能研究[J].新疆大学学报(自然科学版中英文),2024,41(06):657-664.
[1]梁佳敏,徐梦姣,黄岭,等.Ca~(2+)/Pr~(3+)共掺Ce_(0.8)Sm_(0.2)O_(2-δ)电解质的制备及其离子导电性能研究[J].新疆大学学报(自然科学版中英文),2024,41(06):657-664. DOI： 10.13568/j.cnki.651094.651316.2024.02.19.0001.

DOI：10.13568/j.cnki.651094.651316.2024.02.19.0001.

摘要

氧化铈基电解质被认为是中低温理想的固体氧化物燃料电池电解质之一．其中Sm3+掺杂氧化铈Ce0.8Sm0.2O2-δ(SDC)电解质表现出良好的离子电导率和稳定性．但长期低氧分压环境下，体系中部分Ce4+易被还原为Ce3+而产生一定的电子电导，造成电池内局部短路，材料的离子电导率随之降低．基于上述现状，采用共掺杂策略，通过溶胶凝胶法制备Ca2+/Pr3+共掺SDC电解质材料，以期进一步改善Ce4+的还原问题．通过多种表征手段对该系列材料的物相组成、微观形貌及电化学性能进行分析．实验结果表明：Ce0.8Sm0.1Pr0.08Ca0.02O2-δ(PCSDC2)电解质在离子活化能降低的同时致密度得到一定的提升．600℃时，PCSDC2电解质的离子电导率较原有SDC提升了2.90倍．

Abstract

Cerium oxide-based electrolyte is considered as one of the ideal solid electrolytes in the low and medium temperature region. Among them

Sm3+doped cerium oxide Ce0.8Sm0.2O2-δ(SDC) electrolyte shows good ionic conductivity and stability. However

in the long-term low oxygen partial pressure environment

part of Ce4+in the system are easy to be reduced to Ce3+and produce a certain electronic conductivity

resulting in a local short circuit inside the battery and a subsequent decrease in the ionic conductivity of the materials. Based on the above problems

Ca2+/Pr3+co-doped SDC electrolyte materials were prepared by sol-gel method using the co-doping strategy with a view to further improving the reduction of Ce4+. The physical phase composition

microscopic morphology and electrochemical properties of this series of materials were analyzed by various characterization means. The experimental results show that the Ce0.8Sm0.1Pr0.08Ca0.02O2-δ electrolyte have a certain enhancement of densities while the ionic activation energies are reduced. At 600 ℃

the ionic conductivity of PCSDC2 electrolyte enhance 2.90 times higher than that of the SDC electrolyte.

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references

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