Details

Autor(en) / Beteiligte

• Chao, Chia-Hung
• Hsieh, Chien-Te
• Ke, Wen-Jie
• Lee, Li-Wei
• Lin, Yeou-Fu
• Liu, Hao-Wei
• Gu, Siyong
• Fu, Chun-Chieh
• Juang, Ruey-Shin
• Mallick, Bikash Chandra
• Gandomi, Yasser Ashraf
• Su, Cherng-Yuh

Titel

Roll-to-roll atomic layer deposition of titania coating on polymeric separators for lithium ion batteries

Ist Teil von

• Journal of power sources, 2021-01, Vol.482, p.228896, Article 228896

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Atomic layer deposition (ALD) on flexible substrates has rarely been demonstrated using roll-to-roll (R2R) coating configuration. We develop R2R ALD technique to uniformly coat TiO2 layer on the porous polyethylene (PE) separators for Li-ion batteries (LIBs). The R2R ALD method using titanium isopropoxide and water as the precursors enables a precise control over the growth of TiO2 nanolayer on PE separators. The TiO2-coated separators remarkably improve the LIB performance, as compared to the LIBs utilizing pristine polymeric membranes. The TiO2 deposition also enhances the thermal and dimensional stability, through forming a stabilizing and robust skeleton within the polymeric matrix. Accordingly, the TiO2 layers play a critical role in boosting the LIB performance, via increasing the ionic conductivity, decreasing high-frequency impedance, and enhancing the electrolyte wettability. Ultimately, the application of ceramic nanocoating on the PE-based porous separators results in improved safety, higher energy density, and excellent cycleability during high-temperature and long-duration cycling of LIBs. Thus, the TiO2-coated separators can be easily adopted to replace the commercially available separators due to excellent performance and reduced cost of manufacturing. The production rate of the ceramic separators can reach as high as 2.4 m min−1 fulfilling the requirements of the industrial and large-scale production. [Display omitted] •Roll-to-roll atomic layer deposition (R2R ALD) on flexible substrates is employed.•R2R ALD method enables a precise control of TiO2 nanolayer on porous separators.•The TiO2 deposition enhances thermal stability, through forming a robust skeleton.•The ceramic coating improves safety, ionic conductivity, and long-duration cycling.•The production rate of the separators fulfills the requirements of industrial need.