Heebae Kim, Eunbin Jang, Jinil Cho, Seonmi Pyo, Heejun Yun, Jeewon Lee, Byeongyun Min, Juyeon Han, Jeeyoung Yoo, Youn Sang Kim
{"title":"Strategic Atomic Interaction Modification for Highly Durable Inorganic Solid Electrolytes in Advanced All-Solid-State Li-Metal Batteries","authors":"Heebae Kim, Eunbin Jang, Jinil Cho, Seonmi Pyo, Heejun Yun, Jeewon Lee, Byeongyun Min, Juyeon Han, Jeeyoung Yoo, Youn Sang Kim","doi":"10.1002/sstr.202400091","DOIUrl":null,"url":null,"abstract":"All-solid-state Li-metal battery (ASSLB) represents advantageous energy storage system for automotive applications. For ASSLB, inorganic solid electrolyte is essential in determining safety and cycling performance. However, significant challenges persist in practical construction of ASSLB with optimized electrolyte. Specifically, electrolyte's structural instability influencing its electrochemical performance remains critical issue within typical operating temperatures for ASSLB in electric vehicles. Herein, this challenge is fundamentally addressed by substituting trace amount of lithium with cadmium, which lacks crystal field stabilization energy. This strategy of atomic interaction modification has induced electrolyte's structural distortion and electronic alteration by deliberately introducing disorder at local lithium sites. Li symmetric cell with cadmium-substituted antiperovskite solid electrolyte exhibits outstanding critical current density of 11.5 mA cm<sup>−2</sup> (5.75 mAh cm<sup>−2</sup>) and excellent stability for 3000 h at 10.0 mA cm<sup>−2</sup> (5.0 mAh cm<sup>−2</sup>). This study highlights explicit research direction for breakthrough of ASSLB, focusing on understanding how local distortion affects complex inorganic materials.","PeriodicalId":21841,"journal":{"name":"Small Structures","volume":"13 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small Structures","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/sstr.202400091","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
All-solid-state Li-metal battery (ASSLB) represents advantageous energy storage system for automotive applications. For ASSLB, inorganic solid electrolyte is essential in determining safety and cycling performance. However, significant challenges persist in practical construction of ASSLB with optimized electrolyte. Specifically, electrolyte's structural instability influencing its electrochemical performance remains critical issue within typical operating temperatures for ASSLB in electric vehicles. Herein, this challenge is fundamentally addressed by substituting trace amount of lithium with cadmium, which lacks crystal field stabilization energy. This strategy of atomic interaction modification has induced electrolyte's structural distortion and electronic alteration by deliberately introducing disorder at local lithium sites. Li symmetric cell with cadmium-substituted antiperovskite solid electrolyte exhibits outstanding critical current density of 11.5 mA cm−2 (5.75 mAh cm−2) and excellent stability for 3000 h at 10.0 mA cm−2 (5.0 mAh cm−2). This study highlights explicit research direction for breakthrough of ASSLB, focusing on understanding how local distortion affects complex inorganic materials.
全固态锂金属电池(ASSLB)是汽车应用中的优势储能系统。对于全固态锂金属电池而言,无机固体电解质对其安全性和循环性能至关重要。然而,在实际建造具有优化电解质的 ASSLB 时,仍然面临着巨大的挑战。具体来说,电解质的结构不稳定性会影响其电化学性能,这在电动汽车 ASSLB 的典型工作温度下仍是一个关键问题。在这里,通过用缺乏晶体场稳定能量的镉替代微量锂,从根本上解决了这一难题。这种原子相互作用修饰策略通过故意在局部锂位点引入无序状态,诱发电解质结构畸变和电子变化。使用镉取代的反包晶石固体电解质的锂对称电池表现出卓越的临界电流密度,达到 11.5 mA cm-2(5.75 mAh cm-2),并在 10.0 mA cm-2(5.0 mAh cm-2)的条件下保持了 3000 小时的卓越稳定性。这项研究强调了突破 ASSLB 的明确研究方向,重点是了解局部变形如何影响复杂的无机材料。