标题: An Electrochemical Approach to Prepare Liquid Sodium-Lead Alloy using a Molten NaCl-Na<sub>2</sub>CO<sub>3</sub> Electrolyte
作者: Wu, YX (Wu, Yongxin); Wang, HY (Wang, Hongya); Xiang, ML (Xiang, Mengli); Hu, ZJ (Hu, Zuojun); Shi, H (Shi, Hao); Pang, FZ (Pang, Fangzhao); Wang, BB (Wang, Bingbing); Zhang, X (Zhang, Xiong); Wang, DH (Wang, Dihua); Liu, XW (Liu, Xiaowei); Yin, HY (Yin, Huayi)
来源出版物: METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE DOI: 10.1007/s11663-025-03596-7 Early Access Date: JUN 2025 Published Date: 2025 JUN 4
摘要: Alloying alkaline metals (AMs) and/or alkaline-earth metals (AEMs) with lead (Pb) is an effective way to increase the mechanical strength of Pb alloys that are commonly employed as grids of lead-acid batteries (LABs). However, current methods for making AM/AEM-Pb alloys by physically mixing pure AM/AEM and Pb face challenges such as instantaneous thermal runaway from exothermic alloy reactions and oxidation of AM/AEM. Herein, sodium-lead (Na-Pb) alloy is directly prepared by molten salt electrolysis without generating Cl2 gas using a molten NaCl-Na2CO3 electrolyte with a current efficiency of above 80 pct at 200 mA<middle dot>cm-2, because the discharge of CO32- is significantly more favorable than that of Cl- at the graphite anode. Furthermore, the reduction of Na+ on the liquid Pb electrode happens at a potential more positive than the reduction of pure Na. The diffusion coefficient of Na in liquid Pb is measured as 3.22 x 10-4 cm2 s-1 at 750 degrees C by the galvanostatic intermittent titration technique (GITT), and the simulated electrolysis current density is 200 mA cm-2. Moreover, the prepared Pb-Ca-Na-Al using the electrolytic Na-Pb alloys achieves a significant mechanical strength improvement (27 pct increase of the hardness, 60 pct increase of the creep resistance). Overall, molten salt electrolysis offers a clean and efficient method for preparing various Pb alloys for next-generation LABs and other applications.
KeyWords Plus: BATTERY; OXYGEN
地址: [Wu, Yongxin; Wang, Hongya; Hu, Zuojun; Shi, Hao; Pang, Fangzhao; Wang, Dihua; Yin, Huayi] Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.
[Wu, Yongxin; Xiang, Mengli; Wang, Bingbing; Zhang, Xiong; Wang, Dihua; Liu, Xiaowei; Yin, Huayi] Wuhan Univ & Chilwee, Joint Ctr Green Mfg Energy Storage Mat, Wuhan 430072, Peoples R China.
[Wang, Dihua; Yin, Huayi] Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable Resource & Energy, Wuhan 430072, Peoples R China.
通讯作者地址: Yin, HY (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.
Yin, HY; Liu, XW (通讯作者)，Wuhan Univ & Chilwee, Joint Ctr Green Mfg Energy Storage Mat, Wuhan 430072, Peoples R China.
Yin, HY (通讯作者)，Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable Resource & Energy, Wuhan 430072, Peoples R China.
电子邮件地址: liuxw888@126.com; yinhuayi@whu.edu.cn
影响因子：3.1
