論文

査読有り 筆頭著者 責任著者 本文へのリンクあり 国際誌
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
  • 李 弘毅
  • ,
  • 村山 将来
  • ,
  • 市坪 哲

3
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
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
  • DOI : 10.1016/j.xcrp.2022.100907
  • eISSN : 2666-3864
  • Web of Science ID : WOS:000815836500001

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