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Spark Plasma Sintering of LiFePO4: AC Field Suppressing Lithium Migration.

ABSTRACT: 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 × 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.

SUBMITTER: Luo N

PROVIDER: S-EPMC8198947 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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Spark Plasma Sintering of LiFePO4: AC Field Suppressing Lithium Migration.

Luo Nan N Lin Yong Y Guo Jian J Quattrocchi Emanuele E Deng Huaijiu H Dong Jian J Ciucci Francesco F Boi Filippo F Hu Chunfeng C Grasso Salvatore S

Materials (Basel, Switzerland) 20210525 11

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 × 10-3</s ...[more]

PMID: 34070590

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