通过固相反应法制备出室温下高离子电导率Ta掺杂的锂镧锆钽氧（Li_6.5La₃Zr_1.5Ta_0.5O₁₂，LLZTO）固体电解质，详细研究了电子束辐照对LLZTO固体电解质结构和性能的影响。结果表明：电子束（250 kGy、500 kGy）辐照后并未产生其他杂相，且晶格间距随着剂量的增加逐渐变大，这有利于降低离子在晶格中的扩散能垒。第一性原理的计算发现，低剂量电子束辐照样的Li⁺扩散能垒比未辐照样降低了0.07 eV，说明辐照产生的缺陷能促进Li⁺扩散。辐照前后的电解质交流阻抗测试进一步证实了低剂量的电子束辐照有利于提升电解质的离子电导率。利用电子束辐照探究其对LLZTO氧化物固体电解质结构和电导率的影响对固体电解质的研究具有重要意义。

Ta-doped lithium-lanthanum-zirconium-oxygen (Li_6.5La₃Zr_1.5Ta_0.5O₁₂, LLZTO) solid electrolytes with a high ionic conductivity at room temperature were prepared by the solid-phase reaction method, and the effects of irradiated electron beams on their structure and properties were investigated in detail. The results showed that no other heterogeneous phases were produced after irradiation with different doses (250 kGy and 500 kGy) of electron beams, and the lattice spacing became larger with an increase in the dose, which is conducive to the reduction of the diffusion energy barrier of ions in the lattice. First-principles calculations revealed that the Li⁺ diffusion energy barrier of the low-dose electron-beam irradiated sample was reduced by 0.07 eV compared with that of the unirradiated sample, suggesting that the defects created by irradiation can promote Li⁺ diffusion. An AC impedance test of the electrolytes before and after irradiation further confirmed that low-dose electron beam irradiation is beneficial for enhancing their ionic conductivity. Exploring the effect of electron beam irradiation on the structure and conductivity of LLZTO oxide solid state electrolytes holds significance in the study of solid state electrolytes.