标題: Modeling the mass transfer and phase transition of Sn-Sb positive electrode in a liquid metal battery

作者: Li, WM (Li, Wenmiao); Shi, H (Shi, Hao); Du, KF (Du, Kaifa); Liu, W (Liu, Wei); Yin, HY (Yin, Huayi); Shi, YX (Shi, Yixiang); Wang, DH (Wang, Dihua)

來源出版物: JOURNAL OF ELECTROANALYTICAL CHEMISTRY 卷: 909 文獻号: 116144 DOI: 10.1016/j.jelechem.2022.116144 出版年: MAR 15 2022

摘要: Liquid metal batteries (LMBs) are considered as a potential solution for large-scale energy storage. The complicated mass transfer and liquid-solid transition process at the liquid positive electrode/liquid molten salt interface have not been well understood. Herein we propose a two-step model to simulate the mass transfer and liquid-solid transition process of the positive Sn-Sb electrode in the Li||Sn-Sb battery. Firstly, the one dimensional electrochemical (1D-EC) model is used to study the constant flux and simulate the distribution of Li in liquid Li-Sn-Sb alloy. Secondly, when a solid intermetallic film forms on the top of liquid Sn-Sb, constant concentration diffusion (CCD) model is used to study the growth rate of solid Li3Sb. In the full liquid region of Li-Sn-Sb, the experimental discharge curve matches well with the simulated curve. Using the established model, we can predict the starting point of solid intermetallic layer. Overall, 1D-EC and CCD models are a promising tool for engineering and diagnosing LMBs.

作者關鍵詞: Liquid metal battery; Phase transition; Li diffusion; Modeling; Sn-Sb alloy

KeyWords Plus: LITHIUM-ANTIMONY

地址: [Li, Wenmiao; Shi, Hao; Du, Kaifa; Liu, Wei; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Li, Wenmiao; Shi, Hao; Du, Kaifa; Liu, Wei; Yin, Huayi; Wang, Dihua] Wuhan Univ, Int Cooperat Base Sustainable Utilizat Resources, Wuhan 430072, Peoples R China.

[Shi, Yixiang] Tsinghua Univ, Dept Energy & Power Engn, Key Lab Thermal Sci & Power Engn, Minist Educ, Beijing 100084, Peoples R China.

通訊作者地址: Wang, DH (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Wang, DH (通訊作者)，Wuhan Univ, Int Cooperat Base Sustainable Utilizat Resources, Wuhan 430072, Peoples R China.

電子郵件地址: wangdh@whu.edu.cn

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