A位掺杂的LaCoO<sub>3</sub>钙钛矿氧化物热化学储能实验研究

强佳琳; 王登辉; 褚恒; 惠世恩

doi:10.7652/xjtuxb202303003

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A位掺杂的LaCoO₃钙钛矿氧化物热化学储能实验研究

专题新能源与储能 | 更新时间：2025-07-09

- A位掺杂的LaCoO₃钙钛矿氧化物热化学储能实验研究
- Experimental Study on Thermochemical Energy Storage of A-Doped LaCoO₃ Perovskite Oxides
- 西安交通大学学报 2023年57卷第3期页码：35-46
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
  
  : 2022-06-28。作者简介: 强佳琳(1998—),女,硕士生
  王登辉(通信作者),男,副教授,博士生导师。基金项目: 国家自然科学基金资助项目(51906193)。
- 基金信息：
  
  : 2022-06-28。作者简介: 强佳琳(1998—),女,硕士生;王登辉(通信作者),男,副教授,博士生导师。基金项目: 国家自然科学基金资助项目(51906193)。
- DOI：10.7652/xjtuxb202303003
  中图分类号： TK114
- 网络首发：2023-03-10，
  
  纸质出版：2023
- 稿件说明：
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强佳琳, 王登辉, 褚恒, 等. A位掺杂的LaCoO₃钙钛矿氧化物热化学储能实验研究[J]. 西安交通大学学报, 2023,57(3):35-46. DOI: 10.7652/xjtuxb202303003.

QIANG Jialin, WANG Denghui, CHU Heng, et al. Experimental Study on Thermochemical Energy Storage of A-Doped LaCoO₃ Perovskite Oxides[J]. 2023, 57(3): 35-46. DOI: 10.7652/xjtuxb202303003.
强佳琳, 王登辉, 褚恒, 等. A位掺杂的LaCoO₃钙钛矿氧化物热化学储能实验研究[J]. 西安交通大学学报, 2023,57(3):35-46. DOI: 10.7652/xjtuxb202303003. DOI：

QIANG Jialin, WANG Denghui, CHU Heng, et al. Experimental Study on Thermochemical Energy Storage of A-Doped LaCoO₃ Perovskite Oxides[J]. 2023, 57(3): 35-46. DOI: 10.7652/xjtuxb202303003. DOI：

摘要

为解决太阳能热发电系统存在的间歇性供电问题

基于热化学储能体系

提出将钙钛矿复合氧化物作为储能材料。采用溶胶-凝胶法制备了一系列A位掺杂的钴酸镧钙钛矿氧化物La

1-x

CoO

(M=Sr

Ba; x是M元素掺杂的摩尔分数的百分点)

利用同步热分析仪在空气气氛下对该系列样品进行测试

并探究煅烧温度、A位掺杂元素种类、掺杂量对样品合成及热化学储能性能的影响。通过X射线衍射仪对钙钛矿样品的晶体结构进行了表征分析。结果表明:由于较低的煅烧温度导致样品不纯

在热重分析时

第一个循环的还原过程质量损失率太大

且样品的质量变化随着循环而产生恶化。较高的温度可以得到纯度和结晶度更高的样品; K的掺杂对样品的储能性能无效; Sr掺杂样品的质量变化随着Sr掺杂量的增加呈现先增加后减小的趋势

其中LS28C的储能性能最好; Ba掺杂后

样品的质量变化和反应速率随着Ba含量的增加而提高。该实验研究在空气条件下进行

无需增设真空泵等设备

既简化了系统

也降低了运营成本。

Abstract

To solve the intermittent power supply problem of the solar thermal power generation system

perovskite oxides are proposed as energy storage materials based on the thermochemical energy storage system. A series of A-doped La

1-x

CoO

(M=Sr

and x is the percentage of mole fraction of M element doping)are prepared using the sol-gel method. The series of samples are tested in an air atmosphere by a synchronous thermal analyzer

and the effects of A-site doping element type

dopi

ng amount and calcination temperature on the synthesis and thermochemical energy storage performance of samples are investigated. The crystal structures of the perovskite samples are characterized and analyzed by X-ray diffraction. There are some results shown as follows: Due to the lower calcination temperature

the samples is impure. The weight loss during the first cycle of reduction is excessively large

and the quality change of the samples deteriorate with the cycle in the thermogravimetric analysis. Samples with higher purity and crystallinity can be obtained at a higher temperature.The doping of K has no effect on the energy storage performance of the samples. The weight changes of Sr-doped samples first increase and then decrease with the increase of Sr doping amount

and LS28C has the best energy storage performance. The mass change and reaction rate of the samples increase with the increase of Ba content. The experimental research in this paper is carried out under air conditions without adding a vacuum pump and other equipment

which not only simplifies the system

but also reduces the operating cost.

关键词

Keywords

references

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A位掺杂的LaCoO3钙钛矿氧化物热化学储能实验研究

Experimental Study on Thermochemical Energy Storage of A-Doped LaCoO3 Perovskite Oxides

DOI：10.7652/xjtuxb202303003

摘要

Abstract

关键词

Keywords

references

A位掺杂的LaCoO₃钙钛矿氧化物热化学储能实验研究

Experimental Study on Thermochemical Energy Storage of A-Doped LaCoO₃ Perovskite Oxides