Aluminum current collector for high voltage Li-ion battery. Part II: Benefit of the En’ Safe® primed current collector technology

• Published in: Electrochemistry communications Vol. 126; p. 107008
• Main Authors: Bizot, Chloé, Blin, Marie-Anne, Guichard, Pierre, Soudan, Patrick, Gaubicher, Joël, Poizot, Philippe
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2021; Elsevier
• Subjects: 5 V Li-ion batteries; Coated current collector; Condensed Matter; LNMO electrode design; Materials Science; Physics; 5 V Li-ion batteries; Coated current collector; LNMO electrode design
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2021.107008

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•Design of an innovative coated aluminum current collector for 5 V Li-ion batteries.•Al protection against anodic dissolution in 1 M LiTFSI/[EC/DMC] electrolyte.•Decrease in current collector interfacial resistance of LNMO composite electrode.
This paper reports the benefits of a carbon coated aluminum current collector specifically designed to promote LiNi1.5M1.5O4 (LNMO) as high potential positive electrode material. This underlayer allows efficient protection of the aluminum surface in 1 M LiTFSI/[EC/DMC] electrolyte for more than 100 cycles (C/2–D/2) in experimental conditions mimicking the electrochemical response of LNMO. The design of such coating appears therefore as a very encouraging strategy to make the use of imide-based electrolytes possible despite their corrosive properties towards aluminum. The as-developed carbon coating also reduces the interfacial impedance of an LNMO-based electrode by a factor of 5 in 1 M LiPF6/[EC/DMC] electrolyte therefore paving the way to accelerate the industrial deployment of safe “5V” Li-ion batteries.