Super Long-Cycling All-Solid-State Battery with Thin Li6PS5Cl-Based Electrolyte,Advanced Energy Materials

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Super Long-Cycling All-Solid-State Battery with Thin Li6PS5Cl-Based Electrolyte
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-05-06 , DOI: 10.1002/aenm.202200660
Sijie Liu ₁ , Le Zhou ₁ , Jian Han ₁ , Kaihua Wen ₁ , Shundong Guan ₁ , Chuanjiao Xue ₁ , Zheng Zhang ₁ , Ben Xu ₂ , Yuanhua Lin ₁ , Yang Shen ₁ , Liangliang Li ₁ , Ce‐Wen Nan ₁

Affiliation

All-solid-state batteries (ASSBs) using sulfide electrolytes have attracted ever-increasing interest due to high ionic conductivity of the sulfides. Nevertheless, a thin, strong solid-state sulfide electrolyte membrane maintaining high ionic conductivity is highly desired for ASSBs. Here, a thin, flexible composite solid electrolyte membrane composed of argyrodite sulfide Li₆PS₅Cl and a polar poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) framework is prepared via an electrospinning-infiltration-hot-pressing method. The interaction between Li₆PS₅Cl and polar P(VDF-TrFE) ensures a high lithium-ion conductivity (≈1.2 mS cm^–1) at room temperature and good mechanical ductility of the composite electrolyte membrane. The coin-type ASSB cells with the thin composite electrolyte membrane, a composite cathode of LiNbO₃-coated LiNi_0.8Co_0.1Mn_0.1O₂ and Li₆PS₅Cl, and a lithium-indium anode, show super cycling performance, and the capacity retention is 92% after 1000 cycles and 71% even after 20 000 cycles at 1.0 mA cm^–2 (i.e., 1.61 C) at room temperature. Moreover, pouch-type ASSB cells with a high mass loading of active materials are made to demonstrate the potential and feasibility in future commercial applications.

中文翻译：

采用薄 Li6PS5Cl 基电解质的超长循环全固态电池

由于硫化物的高离子电导率，使用硫化物电解质的全固态电池 (ASSB) 引起了越来越多的兴趣。然而，ASSB 非常需要一种薄而坚固的固态硫化物电解质膜，以保持高离子电导率。_{在这里，通过静电纺丝-渗透-热-纺丝法制备了一种由硫银硫醚 Li 6} PS ₅ Cl 和极性聚偏二氟乙烯-共-三氟乙烯 (P(VDF-TrFE)) 骨架组成的薄而柔韧的复合固体电解质膜。压制法。_{Li 6} PS ₅ Cl 和极性 P(VDF-TrFE)之间的相互作用确保了高锂离子电导率 (≈1.2 mS cm ^–1) 在室温下复合电解质膜具有良好的机械延展性。具有薄复合电解质膜、LiNbO ₃包覆的LiNi _0.8 Co _0.1 Mn _0.1 O ₂和Li ₆ PS ₅ Cl 的复合正极和锂铟负极的纽扣型ASSB电池显示出超强的循环性能，并且1000 次循环后容量保持率为 92%，即使在 1.0 mA cm ^-2（即 1.61 C）室温下循环 20 000 次后容量保持率为 71%。此外，制造具有大量活性材料负载的袋型ASSB电池，以证明在未来商业应用中的潜力和可行性。

更新日期：2022-05-06

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