Intermediate-Stage Sintered LLZO Scaffolds for Li-Garnet Solid-State Batteries,Advanced Energy Materials

当前位置： X-MOL 学术 › Adv. Energy Mater. › 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.)

Intermediate-Stage Sintered LLZO Scaffolds for Li-Garnet Solid-State Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2023-03-03 , DOI: 10.1002/aenm.202203509
Faruk Okur _{1,

2} , Huanyu Zhang _{1,

2} , Dogan Tarik Karabay _{1,

2} , Konrad Muench _{1,

2} , Annapaola Parrilli ₃ , Antonia Neels ₃ , Walid Dachraoui ₄ , Marta D. Rossell ₄ , Claudia Cancellieri ₅ , Lars P. H. Jeurgens ₅ , Kostiantyn V. Kravchyk _{1,

2} , Maksym V. Kovalenko _{1,

2}

Affiliation

While significant progress has been achieved in the field of Li-garnet solid-state batteries, their further development, is hindered by the formation of cavities at the Li₇La₃Zr₂O₁₂ (LLZO)/Li interface at practically relevant current densities and areal capacities exceeding 1 mA cm⁻² and 1 mAh cm⁻². As a result, the cells exhibit limited cycling stability due to the inhomogeneous distribution of the applied current density, and therefore, the formation of Li dendrites. Another aspect of high importance is associated with the development of the fabrication methodology of thin LLZO electrolytes for achieving the high energy density of Li-garnet solid-state batteries. To contribute to these two challenging problems, in this work, a facile intermediate-stage sintering method of 50-µm thin and porous LLZO membranes with a mean pore size of 2.5 µm is presented. The employment of such porous LLZO membranes not only provides an effective means of mitigating the formation of voids at the LLZO/Li interface due to the increased LLZO/Li surface area, but also maximizes achievable energy densities. It is demonstrated that fabricated porous LLZO membranes exhibit long cycling stability of over 1480 h at a current density of 0.5 mA cm⁻².

中文翻译：

用于锂石榴石固态电池的中间阶段烧结 LLZO 支架

虽然在锂石榴石固态电池领域取得了重大进展，但它们的进一步发展受到在实际相关电流密度下 Li 7 La 3 Zr 2 O 12 (LLZO ) _/ Li_界面空腔_形成的_阻碍面积容量超过 1 mA cm ^-2和 1 mAh cm ^-2. 结果，由于施加的电流密度分布不均匀，电池表现出有限的循环稳定性，因此形成了锂枝晶。另一个高度重要的方面与薄 LLZO 电解质制造方法的发展有关，以实现锂石榴石固态电池的高能量密度。为了解决这两个具有挑战性的问题，在这项工作中，提出了一种简便的中间阶段烧结方法，用于平均孔径为 2.5 µm 的 50 µm 薄多孔 LLZO 膜。由于 LLZO/Li 表面积增加，这种多孔 LLZO 膜的使用不仅提供了一种减轻 LLZO/Li 界面空隙形成的有效方法，而且还最大限度地提高了可实现的能量密度。^-2。

更新日期：2023-03-03

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南