论文标题
LI1.5AL0.5GE1.5（PO4）3玻璃的超快结晶和烧结及其对离子传导的影响
Ultrafast crystallization and sintering of Li1.5Al0.5Ge1.5(PO4)3 glass and its impact on ion conduction
论文作者
论文摘要
LI1.5AL0.5GE1.5（PO4）3（LAGP）是下一代全稳态锂电池最有希望的实心电解质之一。但是，制备延率电解质是及时的能源密集型。在这项工作中，在对连续工业过程（即环境压力和大气中）有吸引力的条件下，超快高温烧结（UHS）在180秒内通过超快高温烧结（UHS）在180秒内烧结并结晶。 UHS的快速加热速率显着延迟结晶，潜在地将结晶和烧结。此外，EIS的表征表明，通过UHS烧结和结晶的LAGP的离子电导率为1.15 10-4 s/cm，略低于常规退火样品（1.75 10-4 s/cm）。较低的电导率可以归因于较差的间间接触。为了克服这个问题，使用了B2O3和LI3BO3等添加剂，与LAGP相比，LAGP+1 WT B2O3和LAGP+1 WT LI3BO3的晶界电导率分别高2和5倍。总体而言，这项工作提供了揭示UHS烧结对LAGP LI+传导机制的影响的见解。
Li1.5Al0.5Ge1.5(PO4)3 (LAGP) is among the most promising solid electrolytes for the next generation all-solid-state lithium batteries. However, preparing LAGP electrolytes is timeand energy-intensive. In this work, LAGP glassy powders were sintered and crystallized in 180 seconds by ultrafast high-temperature sintering (UHS) under conditions attractive for continuous industrial processes (i.e., ambient pressure and atmosphere). The fast heating rates characteristic of UHS significantly delay crystallization, potentially decoupling crystallization and sintering. Furthermore, EIS characterizations reveal that LAGP sintered and crystallized by UHS has an ionic conductivity of 1.15 10-4 S/cm, slightly lower than conventionally annealed samples (1.75 10-4 S/cm). The lower conductivity can be attributed to poorer intergrain contact. To overcome this issue, additives such as B2O3 and Li3BO3 are used, resulting in 2 and 5 times higher grain boundary conductivity for LAGP+1 wt B2O3 and LAGP+1 wt Li3BO3, respectively, compared to LAGP. Overall, this work provides insights into unraveling the impact of UHS sintering on the LAGP Li+ conduction mechanism.
