期刊
MATERIALS
卷 14, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/ma14112826
关键词
spark plasma sintering; LiFePO4; DC and AC; lithium-ion migration
类别
资金
- Thousand Talents Program of China [5187020096]
- Thousand Talents Program of Sichuan Province [5187020096]
- Natural Sciences Foundation of China [52072311]
- Outstanding Young Scientific and Technical Talents in Sichuan Province [2019JDJQ0009]
This study compares the effects of Alternating Current (AC) and Direct Current (DC) on Spark Plasma Sintering of LiFePO4, finding that the use of AC can enhance Li-ion migration efficiency and achieve higher ionic conductivity. It anticipates the possibility of fabricating high-performance all-solid-state Li-ion batteries.
Our work proposes a comparison between Spark Plasma Sintering of LiFePO4 carried out using an Alternating Current (AC) and Direct Current (DC). It quantifies the Li-ion migration using DC, and it validates such hypothesis using impedance spectroscopy, X-ray photoelectron spectroscopy and inductively coupled plasma optical emission spectroscopy. The use of an AC field seems effective to inhibit undesired Li-ion migration and achieve high ionic conductivity as high as 4.5 x 10(-3) S/cm, which exceeds by one order of magnitude samples processed under a DC field. These results anticipate the possibility of fabricating a high-performance all-solid-state Li-ion battery by preventing undesired Li loss during SPS processing.
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