Preparation and electrochemical properties of La0.4Sr0.6FeO3 as negative electrode of Ni/MH batteries
Preparation and electrochemical properties of La0.4Sr0.6FeO3 as negative electrode of Ni/MH batteries
复制标题
Ni/MH电池负极La0.4Sr0.6FeO3的制备及其电化学性能
DOI：
10.1016/j.ijhydene.2009.04.061
复制
发表时间：
2009-07
影响因子：
7.2
通讯作者：
Liu, Ming
中科院分区：
文献类型：
--
作者：
Deng, Gang;Chen, Yungui;Tao, Mingda;Wu, Chaoling;Shen, Xiangqian;Yang, Heng;Liu, Ming
采用硬脂酸燃烧法制备了钙钛矿型氧化物La 0. 4Sr 0. 6 FeO 3粉体，并系统研究了其作为Ni/MH电池负极材料的相结构、动力学特性和电化学性能。X射线衍射（XRD）分析表明，所制备的粉体为单相菱面体结构。在20次循环后，钙钛矿型结构仍然保留在电极样品中。电化学测试表明，在La0.4Sr0.6FeO3电极上的反应是可逆的。随着温度从298 K升高到333 K，其初始放电容量分别从153.4mAhg− 1增加到502.6mAhg− 1（31.25mAg−1）和56.0mAhg− 1增加到279.6mAhg− 1（125 mAg −1）。在125 mAg −1的放电电流密度下，其在298 K、313 K和333 K的容量分别稳定在80.0mAhg−1、195 mAhg − 1和370 mAhg − 1左右。La0.4Sr0.6FeO3氧化物电极的交换电流密度和质子扩散系数也以与放电容量类似的方式随温度增加。
Perovskite-type oxide La0.4Sr0.6FeO3powder was prepared by a stearic acid combustion method, and its phase structure, kinetic characteristics, and electrochemical properties were systematically investigated as the negative electrode for Ni/MH batteries. X-ray diffraction (XRD) shows that the as-prepared powder consists of a single phase with rhombohedral structure. After 20 cycles, perovskite-type structure still remains in the electrode sample. The electrochemical test shows that the reaction at the La0.4Sr0.6FeO3electrode is reversible. With an increase in temperature from 298K to 333K, its initial discharge capacities increase from 153.4mAhg−1to 502.6mAhg−1at 31.25mAg−1, and from 56.0mAhg−1to 279.6mAhg−1at 125mAg−1, respectively. At a discharge current density of 125mAg−1, its capacities keep steady at about 80.0mAhg−1, 195mAhg−1and 370mAhg−1at 298K, 313K and 333K, respectively. Both the exchange current density and the proton diffusion coefficient of the La0.4Sr0.6FeO3oxide electrode also increase with temperature in a manner similar to the discharge capacity.
登录
查看更多内容
影响因子：
6.2
作者：
J. Jensen;Thomas S. Møller;N. Bjerrum
通讯作者：
J. Jensen;Thomas S. Møller;N. Bjerrum
影响因子：
9.2
作者：
S. Shi;C. Ouyang;M. Lei
通讯作者：
S. Shi;C. Ouyang;M. Lei
影响因子：
7.2
作者：
I. Saldan;R. Burtovyy;H. Becker;V. Ader;C. Wöll
通讯作者：
I. Saldan;R. Burtovyy;H. Becker;V. Ader;C. Wöll
影响因子：
6.2
作者：
Jing-Wang Liu;H. Yuan;Jian-sheng Cao;Yijing Wang
通讯作者：
Jing-Wang Liu;H. Yuan;Jian-sheng Cao;Yijing Wang
影响因子：
7.2
作者：
S. Srivastava;R. K. Upadhyay
通讯作者：
S. Srivastava;R. K. Upadhyay