标题: Preparation of Pb-Ca Master Alloy by Molten Salt Electrolysis

作者: Wu, YX (Wu, Yongxin); Cai, MY (Cai, Muya); Wang, HY (Wang, Hongya); Hu, ZJ (Hu, Zuojun); Pang, FZ (Pang, Fangzhao); Chen, X (Chen, Xiang); Zhao, MY (Zhao, Meiyu); Wang, BB (Wang, Bingbing); Zhang, X (Zhang, Xiong); Liu, XW (Liu, Xiaowei); Wang, DH (Wang, Dihua); Yin, HY (Yin, Huayi)

来源出版物: JOURNAL OF THE ELECTROCHEMICAL SOCIETY卷: 170期: 12文献号: 122505 DOI: 10.1149/1945-7111/ad155a出版年: DEC 1 2023

摘要: Lead-acid batteries (LABs) are commonly utilized in various applications such as electric motorcycles, uninterruptible power systems, and stationary energy storage devices. Calcium (Ca) is an essential element being added to Pb grid alloys to increase their mechanical strength. In this paper, molten salt electrolysis is used to prepare Pb-Ca master alloy in molten CaCl2-NaCl at 700 degrees C. The Ca concentration reaches 2.51 wt%, and the current efficiency reaches 85.0% for the 1 A-scale electrolyzer and 75.8% for the 50 A-scale cell. Compared with the traditional physical mixing ways, Ca is selectively and gradually deposited in the liquid Pb cathode without worrying about the immense heat generated by mixing Ca and Pb. In addition, molten salt serves as a media to avoid the oxidation of Ca. Through thermodynamic calculations and electrochemical measurements, the Pb-Ca formation prefers to happen rather than Pb-Na alloy in molten CaCl2-NaCl because of the stronger interaction of Ca and Pb than Na and Pb. Overall, this paper provides a straightforward strategy to prepare Pb-Ca master alloys, which can be expanded to prepare various liquid semimetal alloys containing reactive metals.

作者关键词: Lead-acid battery; selective alloying; Pb-Ca alloy; molten salt electrolysis

地址: [Wu, Yongxin; Cai, Muya; Wang, Hongya; Hu, Zuojun; Pang, Fangzhao; Chen, Xiang; Zhao, Meiyu; Wang, Dihua; Yin, Huayi] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Wu, Yongxin; Wang, Bingbing; Zhang, Xiong; Liu, Xiaowei; Wang, Dihua; Yin, Huayi] Joint Ctr Green Mfg Energy Storage Mat Wuhan Univ, Wuhan 430072, Peoples R China.

[Wang, Dihua; Yin, Huayi] Wuhan Univ, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

通讯作者地址: Yin, HY (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Yin, HY (通讯作者)，Joint Ctr Green Mfg Energy Storage Mat Wuhan Univ, Wuhan 430072, Peoples R China.

Yin, HY (通讯作者)，Wuhan Univ, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

电子邮件地址: yinhuayi@whu.edu.cn

影响因子：3.9