2022年5月20日
Dendrite-free alkali metal electrodeposition from contact-ion-pair state induced by mixing alkaline earth cation
Cell Reports Physical Science
- ,
- ,
- 巻
- 3
- 号
- 6
- 開始ページ
- 100907
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.xcrp.2022.100907
- 出版者・発行元
- Cell Press
Alkali metals are expected to be used for rechargeable metal anode batteries owing to their low electrode potentials and large capacities. However, they face the well-known fatal problem of “dendritic growth” while charging. Here, we present a detailed investigation on electrolytes where alkaline earth salts are introduced to inhibit dendrite growth in alkali metal electrodeposition. Specifically, focusing on CaTFSA2 as an exemplary additive, we reveal that dendrite-free morphology upon alkali metal electrodeposition can be attained by modifying the solvation structures in dual-cation electrolytes. Addition of Ca2+ promotes alkali cation (Li+ or Na+) to form the contact ion pairs (CIPs) with the counter anions, which replaces the solvent-separated ion pairs that commonly exist in single-cation electrolytes. The strong binding of the CIPs slows the desolvation kinetics of alkali cations and, consequently, realizes a severely constrained alkali metal electrodeposition in a reaction-limited process that is required for the dendrite-free morphology.
- リンク情報
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- DOI
- https://doi.org/10.1016/j.xcrp.2022.100907 本文へのリンクあり
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000815836500001&DestApp=WOS_CPL
- 共同研究・競争的資金等の研究課題
- デュアルカチオン電池系における金属負極析出・溶解機構の解明
- 共同研究・競争的資金等の研究課題
- Li-Mgデュアルカチオン電池の高性能化に向けた正極材料の物質設計
- URL
- https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864(22)00185-0 本文へのリンクあり
- ID情報
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- DOI : 10.1016/j.xcrp.2022.100907
- eISSN : 2666-3864
- Web of Science ID : WOS:000815836500001