La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3钙钛矿高熵陶瓷粉体的制备及其电学性能

doi:10.15541/jim20200380

无机材料学报 ›› 2021, Vol. 36 ›› Issue (4): 431-435.DOI: 10.15541/jim20200380 CSTR: 32189.14.10.15541/jim20200380

所属专题：能源材料论文精选(2021)；【虚拟专辑】钙钛矿材料(2020~2021)；【虚拟专辑】超级电容器(2020~2021)

La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃钙钛矿高熵陶瓷粉体的制备及其电学性能

郭猛(), 张丰年, 苗洋(), 刘宇峰, 郁军, 高峰

太原理工大学材料科学与工程学院, 太原 030024

收稿日期:2020-07-07 修回日期:2020-10-23 出版日期:2021-04-20 网络出版日期:2020-11-05
通讯作者: 苗洋, 副教授. E-mail: miaoyang@tyut.edu.cn
作者简介:郭猛(1997-), 男, 硕士研究生. E-mail: 18235120868@163.com
基金资助:
国家自然科学基金青年基金(51802213);山西省应用基础研究计划面上青年基金(201901D211118)

Preparation and Electrical Properties of High Entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ Perovskite Ceramics Powder

GUO Meng(), ZHANG Fengnian, MIAO Yang(), LIU Yufeng, YU Jun, GAO Feng

School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received:2020-07-07 Revised:2020-10-23 Published:2021-04-20 Online:2020-11-05
Contact: MIAO Yang, associate professor. E-mail: miaoyang@tyut.edu.cn
About author:GUO Meng(1997-), male, Master candidate. E-mail: 18235120868@163.com
Supported by:
Natural Science Foundation of China(51802213);General Youth Program of Applied Basic Research Program of Shanxi Province(201901D211118)

摘要/Abstract

摘要：

采用共沉淀法结合煅烧工艺制备La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃钙钛矿结构高熵陶瓷粉体, 显著降低了材料的合成温度。采用不同手段对其进行物相及形貌表征, 研究结果表明, 当煅烧温度为800 ℃时, 样品已经形成钙钛矿结构, 但有少量第二相; 当煅烧温度为1000 ℃时, La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃陶瓷粉体形成了纯钙钛矿结构。以La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃为电极材料制成工作电极, 采用三电极体系对工作电极进行电学性能测试, 包括循环伏安(CV)及恒流充放电(GCD)测试, 结果显示该电极材料在1 A/g电流密度下具有154.8 F/g的比容量;当电流密度增大到10 A/g时, 该电极材料仍然能保持初始比容量的47%(73 F/g), 说明La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃高熵陶瓷具有较好的倍率性能。

关键词: 高熵陶瓷, 共沉淀, 相稳定, 比容量

Abstract:

High entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ perovskite ceramics powder were prepared using coprecipitation method combined with calcination process, and synthesis temperature of the high entropy perovskite ceramics was significantly reduced. The phases and morphology of the ceramics powder were characterized by different methods. The results show that when the calcination temperature is 800 ℃, perovskite structure with a small amount of second phase was formed in the ceramics powder. When the calcination temperature is 1000 ℃, pure perovskite structure is formed in the La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃high entropy ceramics powder. Three electrode system was used to test the electrical properties of the working electrode made from the La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃high entropy ceramics powder, including cyclic voltammetry (CV) test and constant current charge-discharge (GCD) test. At the current density of 1 A/g, specific capacity of the working electrode reaches 154.8 F/g, while the current density increased to 10 A/g, the electrode material can still maintain 47%(73 F/g) of the initial specific capacity. All results indicate that high entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ perovskite ceramics have good rate properties.

Key words: high entropy ceramics, copercipitation, phasestability, specific capacity

中图分类号:

TB332

郭猛, 张丰年, 苗洋, 刘宇峰, 郁军, 高峰. La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃钙钛矿高熵陶瓷粉体的制备及其电学性能[J]. 无机材料学报, 2021, 36(4): 431-435.

GUO Meng, ZHANG Fengnian, MIAO Yang, LIU Yufeng, YU Jun, GAO Feng. Preparation and Electrical Properties of High Entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ Perovskite Ceramics Powder[J]. Journal of Inorganic Materials, 2021, 36(4): 431-435.

图/表 7

表1 六组样品各元素组分摩尔之比

Table 1 Molar ratios of each element component of the six samples

Sample	La	Co	Cr	Fe	Mn	Ni
La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃	5	1	1	1	1	1
La(Cr_0.25Fe_0.25Mn_0.25Ni_0.25)O₃ La(Co_0.25Fe_0.25Mn_0.25Ni_0.25)O₃ La(Co_0.25Cr_0.25Mn_0.25Ni_0.25)O₃ La(Co_0.25Cr_0.25Fe_0.25Ni_0.25)O₃ La(Co_0.25Cr_0.25Fe_0.25Mn_0.25)O₃	4 4 4 4 4	No 1 1 1 1	1 No 1 1 1	1 1 No 1 1	1 1 1 No 1	1 1 1 1 No

图1 不同温度煅烧所得La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3陶瓷粉体的XRD图谱

Fig. 1 XRD patterns of the La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 ceramic powders calcined at different temperatures

图2 1000 ℃下煅烧所得四元系粉体的XRD图谱

Fig. 2 XRD patterns of the quaternary systems powders calcined at 1000 ℃

图3 样品高度和宽度随煅烧温度的变化

Fig. 3 Height and width of sample varied with calcination temperature

图4 800 ℃煅烧La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3样品的SEM照片(a), 1000 ℃煅烧La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3样品的SEM照片(b)及其元素的EDS分布(c~g)

Fig. 4 SEM image of sample La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 calcined at 800 ℃ (a), SEM image (b) and corresponding EDS element mapping (c-g) of La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 calcined at 1000 ℃

图5 La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 电极的CV曲线

Fig. 5 CV curves of La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 electrode

图6 La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3电极的GCD曲线

Fig. 6 GCD curves of La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 electrode

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La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃钙钛矿高熵陶瓷粉体的制备及其电学性能

Preparation and Electrical Properties of High Entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ Perovskite Ceramics Powder

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