Facile Li+ Transport in Interpenetrating O- and F-Containing Polymer Networks for Solid-State Lithium Batteries

Hanh T.T. Nguyen, Dang H. Nguyen, Qin Cheng Zhang, Van Can Nguyen, Yuh Lang Lee, Jeng Shiung Jan, Hsisheng Teng

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)


Solid polymer electrolytes (SPEs) provide an intimate contact with electrodes and accommodate volume changes in the Li-anode, making them ideal for all-solid-state batteries (ASSBs); however, confined chain swing, poor ion-complex dissociation, and barricaded Li+-transport pathways limit the ionic conductivity of SPEs. This study develops an interpenetrating polymer network electrolyte (IPNE) comprising poly(ethylene oxide)- and poly(vinylidene fluoride)-based networked SPEs (O-NSPE and F-NSPE, respectively) and lithium bis(fluorosulfonyl) imide (LiFSI) to address these challenges. The -CF2-/-CF3 segments of the F-NSPE segregate FSI to form connected Li+-diffusion domains, and -C-O-C- segments of the O-NSPE dissociate the complexed ions to expedite Li+ transport. The synergy between O-NSPE and F-NSPE gives IPNE high ionic conductivity (≈1 mS cm−1) and a high Li-transference number (≈0.7) at 30 °C. FSI aggregation prevents the formation of a space-charge zone on the Li-anode surface to enable uniform Li deposition. In Li||Li cells, the proposed IPNE exhibits an exchange current density exceeding that of liquid electrolytes (LEs). A Li|IPNE|LiFePO4 ASSB achieves charge–discharge performance superior to that of LE-based batteries and delivers a high rate of 7 mA cm−2. Exploiting the synergy between polymer networks to construct speedy Li+-transport pathways is a promising approach to the further development of SPEs.

期刊Advanced Functional Materials
出版狀態Published - 2023 3月 16

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 一般化學
  • 一般材料科學
  • 電化學
  • 生物材料


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