4.5 Article

Ag-Coated Cu/Polylactic Acid Composite Filament for Lithium and Sodium-Ion Battery Current Collector Three-Dimensional Printing via Thermoplastic Material Extrusion

期刊

FRONTIERS IN ENERGY RESEARCH
卷 9, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fenrg.2021.651041

关键词

lithium-ion battery; current collector; material extrusion; 3D-printing; composites

资金

  1. Fonds Europeen de Developpement Regional (FEDER)
  2. Conseil Regional des Hauts-de-France
  3. Universite de Picardie Jules Verne (UPJV)

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This article focuses on the development of a polylactic acid- (PLA-) based thermoplastic composite filament for use as a current collector in lithium-ion or sodium-ion batteries. By incorporating Ag-coated Cu charges and a plasticizer, the filament achieves high electronic conductivity and printability. The study demonstrates the compatibility of this filament with various active materials and its ability to be used with negative electrode active materials in a wide potential window in sodium-ion battery technology.
This article focuses on the development of polylactic acid- (PLA-) based thermoplastic composite filament for its use, once 3D printed via thermoplastic material extrusion (TME), as current collector at the negative electrode side of a lithium-ion battery or sodium-ion battery. High electronic conductivity is achieved through the introduction of Ag-coated Cu charges, while appropriate mechanical performance to allow printability was maintained through the incorporation of poly(ethylene glycol) dimethyl ether average M-n similar to 500 (PEGDME500) as a plasticizer into the PLA polymer matrix. Herein, thermal, electrical, morphological, electrochemical, and printability characteristics are discussed thoroughly. While Ag-Li alloy formation is reported at 0.1V upon cycling, its use with active materials such as Li4Ti5O12 (LTO) or Li-2-terephthalate (Li2TP) operating at a plateau at higher potential is demonstrated. Furthermore, its ability to be used with negative electrode active material of sodium-ion battery technology in a wide potential window is demonstrated.

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