Li1.3Al0.3Ti1.7P3O12 activated PVDF solid electrolyte for advanced lithium–oxygen batteries

IF 10.7 Q1 CHEMISTRY, PHYSICAL EcoMat Pub Date : 2024-07-31 DOI:10.1002/eom2.12481

Caizheng Ou, Hao Zhang, Dan Ma, Hailiang Mu, Xiangqun Zhuge, Yurong Ren, Maryam Bayati, Ben Bin Xu, Xiaoteng Liu, Xiaoqin Zou, Kun Luo

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Abstract

Lithium-ion composite solid electrolyte membranes embedded with Li_1.3Al_0.3Ti_1.7P₃O₁₂ and poly(vinylidene fluoride) are prepared using a facile casting method. Furthermore, we added LiI as an active agent for decomposing the anode product. The synergy resulted in a high conductivity of 7.4 mS·cm⁻¹ and lithium-ion mobility of 0.59 and a reduction of the overpotential to 0.86 V for lithium–oxygen batteries (LOBs). The membrane has enhanced Young's modulus of 6.6 GPa that effectively blocked the lithium dendrite growth during the battery operation and puncturing to the membrane led to a significant LOB cycle life of 542 cycles. Meanwhile, Li|Li symmetrical battery overpotential maintained at 42 mV after 470 h of operation.

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用于先进锂-氧电池的 Li1.3Al0.3Ti1.7P3O12 活性 PVDF 固体电解质

我们采用简便的浇铸法制备了嵌入 Li1.3Al0.3Ti1.7P3O12 和聚（偏氟乙烯）的锂离子复合固体电解质膜。此外，我们还添加了 LiI 作为分解阳极产物的活性剂。通过协同作用，锂氧电池（LOB）的电导率达到 7.4 mS-cm-1，锂离子迁移率达到 0.59，过电位降低到 0.86 V。膜的杨氏模量提高到 6.6 GPa，可有效阻止电池运行过程中锂枝晶的生长，穿刺膜可使锂氧电池的循环寿命达到 542 次。同时，锂锂对称电池的过电位在运行 470 小时后保持在 42 mV。

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