Fe3O4-PVDF Composite Network for Dendrite-Free Lithium Metal Batteries

Yun Ou; Chaoyong Ma; Zhiyong Tang; Chenqi Yao; Yunzhuo Zhao; Juanjuan Cheng

doi:10.3390/nano13202782

Fe₃O₄-PVDF Composite Network for Dendrite-Free Lithium Metal Batteries

Nanomaterials (Basel). 2023 Oct 17;13(20):2782. doi: 10.3390/nano13202782.

Authors

Yun Ou¹, Chaoyong Ma², Zhiyong Tang¹, Chenqi Yao¹, Yunzhuo Zhao¹, Juanjuan Cheng¹

Affiliations

¹ Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
² Guizhou Meiling Power Sources Co., Ltd., No. 705 Zhonghua Rd., Huichuan District, Zunyi 563003, China.

Abstract

Dendrite growth has been the main trouble preventing the practical application of Li metal anodes. Herein, we present how an Fe₃O₄-PVDF composite network prepared by using electrospinning has been designed to protect lithium metal anodes effectively. In the symmetrical cells test, the cell with the Fe₃O₄-PVDF composite network maintains good cycle performance after 600 h (500 cycles) at a current density of 1 mA cm^-2 and a plating/stripping capacity of 1 mAh cm^-2. The bulky Li dendrite is suppressed and a uniform Li deposition remains after long cycling. The characteristics of this engineered separator are further demonstrated in Li-S full cells with a good cycle performance (capacity of 419 mAh g^-1 after 300 cycles at 0.5 C). This work provides a new idea for the protection of lithium metal anodes.

Keywords: Fe3O4; PVDF; dendrite-free; electrospinning; lithium anode.

Abstract

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