A Sulfide-Based Solid Electrolyte With High Humid Air Tolerance for Long Lifespan All-Solid-State Sodium Batteries,Advanced Energy Materials

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A Sulfide-Based Solid Electrolyte With High Humid Air Tolerance for Long Lifespan All-Solid-State Sodium Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-09-10 , DOI: 10.1002/aenm.202401504
Yayu Guo ₁ , Kai Liu ₁ , Cheng Li ₂ , Dawei Song ₁ , Hongzhou Zhang ₁ , Zhenyu Wang ₃ , Yufen Yan ₁ , Lianqi Zhang ₁ , Sheng Dai _{4,

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Affiliation

Sulfide-based superionic conductors present great promise to achieve high energy density and safety for all-solid-state sodium batteries (ASSSBs). However, the poor electrolyte/electrode interface compatibility and humid air stability seriously hinder their deployment in ASSSBs. Herein, a series of high-performance Na_3-□Sb_1-4x(SnWCaTi)_xS₄ sulfide-based solid electrolytes (SSEs) are reported by coupling the vacancy effect with configurational entropy, which displays an excellent interface stability against sodium metal and an extraordinary tolerance toward the moist atmosphere, even for water. The optimized electrolyte effectively inhibits the detrimental mixed ion-electron conducting interphase formation, achieving the ultra-stable operation of Na–Na symmetric cell up to 1000 h. Furthermore, the Na⁺ diffusion kinetics is obviously enhanced by increasing the Na sites local anisotropy and Na vacancies. Eventually, the assembled TiS₂//Na₅Sn ASSSBs deliver a remarkable reversible capacity of 211.6 mAh g⁻¹ at 0.5C with a long-term cycling performance of 450 cycles at room temperature. More importantly, it achieves a steady running up to 100 cycles at 1C even if this electrolyte is placed in the air with a dew temperature of 13.8 °C for 30 min, the highest values in the state-of-the-art sulfide-based ASSSBs. The well-designed SSEs open a new avenue for realizing the advanced and powerful ASSSBs.

中文翻译：

一种硫化物基固体电解质，具有高耐湿性，适用于长寿命全固态钠电池

基于硫化物的超离子导体为全固态钠电池（ASSSB）实现高能量密度和安全性带来了巨大前景。然而，电解质/电极界面兼容性差和潮湿空气稳定性严重阻碍了它们在 ASSSB 中的部署。本文通过将空位效应与构型熵耦合，报道了一系列高性能 Na_3-□Sb_1-4x（SnWCaTi）_xS₄ 硫化物基固体电解质（SSE），其对钠金属表现出优异的界面稳定性和对潮湿大气的非凡耐受性，甚至对水也是如此。优化的电解质有效抑制了有害的混合离子-电子传导界面形成，实现了 Na-Na 对称电池长达 1000 h 的超稳定运行。此外，通过增加 Na 位点局部各向异性和 Na 空位，Na ⁺ 扩散动力学明显增强。最终，组装好的 TiS₂Na₅Sn ASSSB 在 0.5C 下提供 211.6 mAh ^g-1 的显着可逆容量，在室温下具有 450 次循环的长期循环性能。更重要的是，即使将这种电解液置于露温为 13.8 °C 的空气中 30 分钟，它也可以在 1C 下稳定运行多达 100 次循环，这是最先进的硫化物基 ASSSB 中的最高值。精心设计的 SSE 为实现先进而强大的 ASSSB 开辟了一条新的途径。

更新日期：2024-09-10

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