Anisotropic semi-aligned PAN@PVdF-HFP separator for Li-ion batteries. (31st July 2020)

• Record Type: Journal Article
• Authors: Liu, Qiuhong; Jiang, Wenwu; Lu, Weizheng; Mei, Yufan; He, Fakang; Zhang, Minhui; Liu, Yin; Chen, Yunqing; Peng, Jinfeng; Ding, Yanhuai
• Is Part Of: Nanotechnology. Volume 31:Number 43(2020)
• Publication Date: 2020-07-31
• Subjects: PAN@PVdF-HFP -- alignment -- electrospinning -- separator -- anisotropic mechanical properties; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aba303
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Compared with the common electrospun nanofibers, the alignment of the nanofibers exhibits interesting anisotropic mechanical properties and structural stability. In this paper, semi-aligned PAN@PVdF-HFP nanofiber separators were prepared by a modified electrospinning method. The composite separators exhibit anisotropic mechanical properties and enhanced electrochemical performance compared with electrospun PAN films. The PAN@PVdF-HFP nanofiber separator can deliver an ionic conductivity of 1.2 mS⋅cm −1 with electrochemical stability up to 5.0 V. The LiFePO4 /Li cell with semi-aligned PAN@PVdF-HFP separator shows excellent cycling performance, good rate capability, as well as high discharge capacity.