Tuning Interface Lithiophobicity for Lithium Metal Solid-State Batteries,ACS Energy Letters

当前位置： X-MOL 学术 › ACS Energy Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Tuning Interface Lithiophobicity for Lithium Metal Solid-State Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-12-06 , DOI: 10.1021/acsenergylett.1c02122
Xinzi He ₁ , Xiao Ji ₁ , Bao Zhang ₂ , Nuwanthi D. Rodrigo ₃ , Singyuk Hou ₁ , Karen Gaskell ₄ , Tao Deng ₁ , Hongli Wan ₁ , Sufu Liu ₁ , Jijian Xu ₁ , Bo Nan ₁ , Brett L. Lucht ₃ , Chunsheng Wang ₁

Affiliation

Solid-state lithium batteries (SSLBs) using garnet electrolytes potentially have a higher energy density and are safer than liquid organic electrolyte Li-ion batteries. However, SSLBs face challenges of Li dendrite and high interface resistance. In this work, we overcome both challenges by doping strontium (Sr) into lithium anodes. Different from all previous metal/metal oxide coating on garnet or Li alloy anodes that form lithiophilic interlayer, Li–Sr/SrO-doped Li₂O are enriched on the interface forming a lithiophilic/lithiophobic bifunctional layer. The interlayer reduces the interfacial resistance and also suppresses lithium dendrite. The stability of the lithiophobic SrO-doped Li₂O against Li prevents reducing the garnet and suppresses Li dendrite, which distinguishes it from all reported alloy electron-conducting interlayers. The optimized Li–Sr|garnet|Li–Sr symmetric cell achieves a critical current density of 1.3 mA/cm² and can be cycled for 1,000 cycles under 0.5 mA/cm² at room temperature. The bifunctional lithiophilic/lithiophobic interlayer provides a new strategy for high-performance garnet solid-state lithium batteries.

中文翻译：

调整锂金属固态电池的界面疏锂性

使用石榴石电解质的固态锂电池 (SSLB) 可能具有更高的能量密度，并且比液态有机电解质锂离子电池更安全。然而，SSLBs面临着锂枝晶和高界面电阻的挑战。在这项工作中，我们通过将锶 (Sr) 掺杂到锂阳极中来克服这两个挑战。与以往在石榴石或锂合金阳极上形成亲锂中间层的所有金属/金属氧化物涂层不同，Li-Sr/SrO 掺杂的 Li ₂ O 在界面上富集，形成亲锂/疏硫双功能层。中间层降低了界面电阻并且还抑制了锂枝晶。疏锂SrO掺杂Li _{2的稳定性}O 对 Li 可防止还原石榴石并抑制 Li 枝晶，这将其与所有报道的合金电子传导中间层区分开来。优化后的 Li-Sr|garnet|Li-Sr 对称电池实现了 1.3 mA/cm ²的临界电流密度，在室温下可在 0.5 mA/cm ²下循环 1,000 次。双功能亲锂/疏硫中间层为高性能石榴石固态锂电池提供了新的策略。

更新日期：2022-01-14

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南