Thin flexible lithium-ion battery featuring graphite paper based current collectors with enhanced conductivity

• Published in: Canadian journal of chemistry Vol. 95; no. 2; pp. 169 - 173
• Main Authors: Qu, Hang, Hou, Jingshan, Tang, Yufeng, Semenikhin, Oleg, Skorobogatiy, Maksim
• Format: Journal Article
• Language: English
• Published: Ottawa NRC Research Press 01.02.2017; Canadian Science Publishing NRC Research Press
• Subjects: Anodes; Batteries; batteries au lithium-ion; batteries flexibles; Cathodes; collecteurs de courant en feuille de graphite; Conductivity; Design and construction; Electric currents; Electrode materials; Encapsulation; Engineering design; Equipment and supplies; Fabrication; flexible batteries; Graphite; graphite paper current collectors; Heavy metals; Lightweight; Lithium; Lithium cells; Lithium-ion batteries; Membranes; Metal foils; Methods; Nanomaterials; Rechargeable batteries; Separators; Substrates; Thickness; Weight reduction
• ISSN: 0008-4042; 1480-3291
• DOI: 10.1139/cjc-2015-0593

A flexible, lightweight, and high conductivity current collector is the key element that enables fabrication of a high-performance, flexible lithium-ion battery. Here, we report a thin, lightweight, and flexible lithium-ion battery that uses graphite papers deposited with nano-sized metallic layers as the current collector, LiFePO 4 and Li 4 Ti 5 O 12 as the cathode and anode materials, respectively, and a PE membrane soaked in LiPF 6 as the separator. Using thin, flexible graphite paper as a substrate for the current collector instead of a rigid, heavy metal foil enables us to demonstrate an ultra-thin lithium-ion battery (total thickness including encapsulation layers of less than 250 μm) that also features a light weight and high flexibility.