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Rechargeable Mg batteries based on a Ag2S conversion cathode with fast solid-state Mg2+ diffusion kinetics.
Dalton Trans. 2019 Oct 14; 48(38):14390-14397.DT

Abstract

Rechargeable Mg batteries are promising candidates for highly safe, large-scale energy storage batteries due to the low-cost and non-dendritic metallic Mg anode. However, exploring high-performance cathodes remains a great challenge blocking their development. Herein, a rechargeable Mg battery is established with a Ag2S conversion cathode, providing a highly reversible capacity of 120 mA h g-1 at 50 mA g-1, a superior rate capability of 70 mA h g-1 at 500 mA g-1, and an outstanding long-term cyclability over 400 cycles. The mechanism was investigated using XRD, TEM and XPS in addition to electrochemical measurements, and indicated a two-stage magnesiation: first, Mg2+ intercalation into Ag2S and then a conversion reaction to form metallic Ag0 and MgS. The solid-state Mg2+ diffusion coefficients are as high as 3.6 × 10-9 and 3.1 × 10-10 cm2 s-1 for the intercalation and conversion reactions, respectively, which explains the high performance of the Ag2S cathode. This work provides scientific insights for the selection of a promising conversion cathode by the combination of soft anions and soft transition metal cations.

Authors+Show Affiliations

Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China. xufei2058@whu.edu.cn.Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China. xufei2058@whu.edu.cn.Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China. xufei2058@whu.edu.cn.Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China. xufei2058@whu.edu.cn.Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China. xufei2058@whu.edu.cn.Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, China. liting@mail.scuec.edu.cn.Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China. xufei2058@whu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31508626

Citation

Zhang, Yujie, et al. "Rechargeable Mg Batteries Based On a Ag2S Conversion Cathode With Fast Solid-state Mg2+ Diffusion Kinetics." Dalton Transactions (Cambridge, England : 2003), vol. 48, no. 38, 2019, pp. 14390-14397.
Zhang Y, Li X, Shen J, et al. Rechargeable Mg batteries based on a Ag2S conversion cathode with fast solid-state Mg2+ diffusion kinetics. Dalton Trans. 2019;48(38):14390-14397.
Zhang, Y., Li, X., Shen, J., Chen, Z., Cao, S. A., Li, T., & Xu, F. (2019). Rechargeable Mg batteries based on a Ag2S conversion cathode with fast solid-state Mg2+ diffusion kinetics. Dalton Transactions (Cambridge, England : 2003), 48(38), 14390-14397. https://doi.org/10.1039/c9dt02221j
Zhang Y, et al. Rechargeable Mg Batteries Based On a Ag2S Conversion Cathode With Fast Solid-state Mg2+ Diffusion Kinetics. Dalton Trans. 2019 Oct 14;48(38):14390-14397. PubMed PMID: 31508626.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Rechargeable Mg batteries based on a Ag2S conversion cathode with fast solid-state Mg2+ diffusion kinetics. AU - Zhang,Yujie, AU - Li,Xue, AU - Shen,Jingwei, AU - Chen,Zhongxue, AU - Cao,Shun-An, AU - Li,Ting, AU - Xu,Fei, Y1 - 2019/09/11/ PY - 2019/9/12/pubmed PY - 2019/9/12/medline PY - 2019/9/12/entrez SP - 14390 EP - 14397 JF - Dalton transactions (Cambridge, England : 2003) JO - Dalton Trans VL - 48 IS - 38 N2 - Rechargeable Mg batteries are promising candidates for highly safe, large-scale energy storage batteries due to the low-cost and non-dendritic metallic Mg anode. However, exploring high-performance cathodes remains a great challenge blocking their development. Herein, a rechargeable Mg battery is established with a Ag2S conversion cathode, providing a highly reversible capacity of 120 mA h g-1 at 50 mA g-1, a superior rate capability of 70 mA h g-1 at 500 mA g-1, and an outstanding long-term cyclability over 400 cycles. The mechanism was investigated using XRD, TEM and XPS in addition to electrochemical measurements, and indicated a two-stage magnesiation: first, Mg2+ intercalation into Ag2S and then a conversion reaction to form metallic Ag0 and MgS. The solid-state Mg2+ diffusion coefficients are as high as 3.6 × 10-9 and 3.1 × 10-10 cm2 s-1 for the intercalation and conversion reactions, respectively, which explains the high performance of the Ag2S cathode. This work provides scientific insights for the selection of a promising conversion cathode by the combination of soft anions and soft transition metal cations. SN - 1477-9234 UR - https://www.unboundmedicine.com/medline/citation/31508626/Rechargeable_Mg_batteries_based_on_a_Ag2S_conversion_cathode_with_fast_solid_state_Mg2+_diffusion_kinetics_ L2 - https://doi.org/10.1039/c9dt02221j DB - PRIME DP - Unbound Medicine ER -
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