Enhanced Electrochemical and Safety performance of Lithium Metal Batteries Enabled by the Atom Layer Deposition on PVDF-HFP Separator

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Yao Yuan
  • Junling Wang
  • Yan Zhang
  • Can Liao
  • Xiaowei Mu
  • Haibo Sheng
  • Yongchun Kan
  • Lei Song
  • Yuan Hu

Detail(s)

Original languageEnglish
Pages (from-to)4167−4174
Journal / PublicationACS Applied Energy Materials
Volume2
Issue number6
Early online date30 May 2019
Publication statusPublished - 24 Jun 2019
Externally publishedYes

Abstract

Lithium metal batteries, due to their unique advantages, such as being lightweight and having the lowest anode potential and the highest theoretical specific capacity, have been regarded as a promising candidate for next-generation electrical energy storage. Nevertheless, the development and practical application of lithium metal batteries has been seriously hindered by the safety issues induced by lithium dendrites. Here, the atom layer deposition (ALD) technique is introduced to fabricate Al2O3 on the surface of a PVDF-HFP membrane to endow it with higher thermal stability, great affinity with electrolytes, improved ion conductivity, and higher Young’s modulus. Employing LiFePO4|Li cells, the ALD100/PH separator imparts batteries with the best cycling performances and rate capacity among various separators. The SEM images of morphology after cycling indicate that ALD100/PH separators with extremely high Young’s modulus and ion conductivity can suppress the growth of lithium dendrites. Moreover, the ALD100/PH separator shows more than 1300 h of stable operation at a current density of 0.5 mA cm–2, exhibiting the capability against metallic lithium and the potential for application in the field of lithium metal batteries. Thus, this interesting ALD technique, capable of a feasible fabrication procedure and with desirable advantages, may be used to make commercial or as-prepared separators more advanced and may be a potential candidate for future rechargeable battery systems, including Li–S, Li–O2, and other metal batteries.

Research Area(s)

  • ALD technique, PVDF-HFP, safety, lithium dendrites, lithium metal batteries

Citation Format(s)

Enhanced Electrochemical and Safety performance of Lithium Metal Batteries Enabled by the Atom Layer Deposition on PVDF-HFP Separator. / Wang, Wei; Yuan, Yao; Wang, Junling; Zhang, Yan; Liao, Can; Mu, Xiaowei; Sheng, Haibo; Kan, Yongchun; Song, Lei ; Hu, Yuan .

In: ACS Applied Energy Materials, Vol. 2, No. 6, 24.06.2019, p. 4167−4174.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review