A Novel Ethanol-Mediated Synthesis of Superionic Halide Electrolytes for High-Voltage All-Solid-State Lithium–Metal Batteries,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 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.)

A Novel Ethanol-Mediated Synthesis of Superionic Halide Electrolytes for High-Voltage All-Solid-State Lithium–Metal Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-06-22 , DOI: 10.1021/acsami.2c06216
Xuming Luo ₁ , Dan Cai ₁ , Xiuli Wang ₁ , Xinhui Xia ₁ , Changdong Gu ₁ , Jiangping Tu ₁

Affiliation

Halide electrolytes are rising stars among inorganic solid-state electrolytes due to their high ionic conductivity and good compatibility with high-voltage electrodes. However, their traditional synthesis methods including ball-milling annealing are usually energy-intensive and time-consuming compared with liquid-mediated routes. What’s more, the only method in aqueous solution is not perfect considering detrimental effect of trace water for battery performances. Here, we propose a novel ethanol-mediated synthesis route for superionic Li₃InCl₆ electrolyte via energy-friendly dissolution and post-treatment. The organics in ethanol-mediated precursor disappear in form of light gas during post-treatment. And Li₃InCl₆ with best thermal stability and ionic conductivity (0.79 mS cm^–1, 20 °C) can be successfully prepared after postheating for 3 h at 200 °C. Besides, it is also found that the ionic conductivity of Li₃InCl₆ is positively correlated with peak intensity ratio of (131) plane/(001) plane since crystal plane and preferred orientation can directly affect polyhedrons through which lithium ions migrate in crystalline conductors. The assembled LiNi_0.8Co_0.1Mn_0.1O₂/Li₃InCl₆/Li₁₀GeP₂S₁₂/Li–In cell presents high initial charge capacity of 174.8 mAh g^–1 at 0.05 C and a good rate performance of 122.9 mAh g^–1 at 1 C. Especially, the retention rate of charge capacity can reach 94.8% after 200 cycles. The ethanol-mediated synthesized Li₃InCl₆ is a novel promising electrolyte which can be coupled with high-voltage cathode for the application of all-solid-state lithium-metal batteries.

中文翻译：

一种用于高压全固态锂金属电池的超离子卤化物电解质的新型乙醇介导合成

卤化物电解质因其高离子电导率和与高压电极良好的相容性而成为无机固态电解质中的后起之秀。然而，与液体介导的路线相比，它们的传统合成方法（包括球磨退火）通常是能量密集型且耗时的。更重要的是，考虑到微量水对电池性能的不利影响，水溶液中的唯一方法并不完美。在这里，我们提出了一种新的乙醇介导的超离子 Li ₃ InCl ₆电解质合成路线，通过能量友好的溶解和后处理。乙醇介导的前体中的有机物在后处理过程中以轻气体的形式消失。和 Li ₃ InCl ₆在 200 °C 后加热 3 h 后，可以成功制备出具有最佳热稳定性和离子电导率 (0.79 mS cm ^{–1 , 20 °C) 的材料。}此外，还发现Li ₃ InCl ₆的离子电导率与(131)面/(001)面的峰强度比正相关，因为晶面和择优取向可以直接影响锂离子在晶体导体中迁移的多面体。 . 组装后的LiNi _0.8 Co _0.1 Mn _0.1 O ₂ /Li ₃ InCl ₆ /Li ₁₀ GeP ₂ S ₁₂/Li-In电池在0.05 C时具有174.8 mAh g ^{-1的高初始充电容量和1 C时122.9 mAh g}^-1的良好倍率性能，特别是200次循环后的充电容量保持率可达94.8%。乙醇介导合成的Li ₃ InCl ₆是一种新型的有前途的电解质，可以与高压正极耦合，用于全固态锂金属电池的应用。

更新日期：2022-06-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11