当前位置: X-MOL 学术J. Electroceram. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Thermal-assisted cold sintering study of a lithium electrolyte: Li 13.9 Sr 0.1 Zn(GeO 4 ) 4
Journal of Electroceramics ( IF 1.7 ) Pub Date : 2020-01-04 , DOI: 10.1007/s10832-019-00196-1
Hiroto Nakaya , Masato Iwasaki , Clive A. Randall

The Thermal-Assisted Cold Sintering Process (TA-CSP) was applied to Li13.9Sr0.1Zn(GeO4)4 (LSZG), a lithium ion conducting electrolyte. The powders were both decomposed and densified between 120 °C and 200 °C under a cold sintering process with an uniaxial pressure of 300 MPa for 1 h and a water transient liquid phase. Then these glassy phases can be recrystallized with a second thermal annealing process with temperatures at 800 °C under a 5-h hold in air. The annealed CSP sample has smaller grain size than those processed with much higher temperature conventional sintering. The electrical properties of the cold sintered LSZG were characterized after the recrystallization process with electrochemical impedance spectroscopy over a temperature range between 25 °C and 400 °C. The data suggests that the lithium ion conductivity is 3.0 × 10−2 Scm−1 at 400 °C; this property is competitive with the conventional sintered samples processed at 1150 °C, and also the best performance reported in the literature. So, the CSP process followed by a recrystallization shows much low temperature advantage over the conventional sintering of the LSZG system.



中文翻译:

锂电解质的热辅助冷烧结研究:Li 13.9 Sr 0.1 Zn(GeO 4)4

热辅助冷烧结工艺(TA-CSP)用于Li 13.9 Sr 0.1 Zn(GeO 44(LSZG),一种锂离子传导电解质。在冷烧结过程中,在300 MPa的单轴压力下1小时和水瞬态液相,粉末在120℃至200℃之间分解并致密化。然后,可以在空气中保持5h的条件下,在800°C的温度下进行第二次热退火工艺,使这些玻璃相重结晶。退火后的CSP样品的晶粒尺寸小于用更高温度的常规烧结工艺加工的晶粒尺寸。经过重结晶过程后,通过电化学阻抗谱在25°C至400°C的温度范围内表征了冷烧结LSZG的电性能。数据表明锂离子电导率为3.0×10 -2 Scm -1在400°C下; 该性能与在1150°C下加工的常规烧结样品具有竞争优势,并且也是文献中报道的最佳性能。因此,与LSZG系统的常规烧结相比,CSP工艺再结晶显示出低得多的温度优势。

更新日期:2020-04-21
down
wechat
bug