Organic Ionic Plastic Crystal-Poly(ethylene oxide) Solid Polymer Electrolytes: Application in All-Solid-State Lithium Batteries,Industrial & Engineering Chemistry Research

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Organic Ionic Plastic Crystal-Poly(ethylene oxide) Solid Polymer Electrolytes: Application in All-Solid-State Lithium Batteries
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-10-03 , DOI: 10.1021/acs.iecr.8b01964
Sijian Li ₁ , Kaihua Yang ₁ , Zhengxi Zhang _{1,

2} , Li Yang _{1,

2,

3} , Shin-ichi Hirano ₃

Affiliation

A new class of solid polymer electrolytes (SPEs) is successfully developed by employing poly(ethylene oxide) (PEO) as a polymer host, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P₁₂FSI) as an ionic plastic crystal, and lithium bis(fluorosulfonyl)imide (LiFSI) as a lithium salt. Their properties, including thermal behavior and electrochemical and mechanical characteristics are evaluated. For the as-obtained SPE system, P₁₂FSI combines with PEO-LiFSI uniformly and no phase separation occurs. Such SPEs exhibit high thermal stability, good electrochemical stability, satisfactory ionic conductivity, acceptable mechanical strength and flexibility, as well as the potential to inhibit the lithium dendrite growth. Furthermore, Li/LiFePO₄ cells containing the as-prepared SPE at 0.2C rate could exhibit a discharge capacity of about 157 mAh g^–1 at 50 °C, with high cycling stability and favorable rate capability. Such SPEs are expected to have great potential for all-solid-state lithium batteries.

中文翻译：

有机离子塑料晶体-聚（环氧乙烷）固体聚合物电解质：在全固态锂电池中的应用

通过使用聚环氧乙烷（PEO）作为聚合物主体，N-乙基-N-甲基吡咯烷鎓双（氟磺酰基）酰亚胺（P ₁₂ FSI）作为离子塑料晶体成功开发了新型的固体聚合物电解质（SPEs），以及双（氟磺酰基）酰亚胺锂（LiFSI）作为锂盐。他们的性能，包括热性能以及电化学和机械性能都得到了评估。对于已获得的SPE系统，P ₁₂FSI与PEO-LiFSI均匀结合，不会发生相分离。这种SPE表现出高的热稳定性，良好的电化学稳定性，令人满意的离子电导率，可接受的机械强度和柔韧性，以及抑制锂枝晶生长的潜力。此外，以0.2C的速度包含制备的SPE的Li / LiFePO ₄电池在50°C时可显示约157 mAh g ^–1的放电容量，具有很高的循环稳定性和良好的倍率能力。预计这种SPE对于全固态锂电池具有巨大的潜力。

更新日期：2018-10-04

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