Fabrication of Porous Electrodes with a Picosecond Pulsed Laser and Improvement of the Rate Performance of a Porous Graphite Anode and LiFePO4 Cathode. (25th October 2017)

• Record Type: Journal Article
• Authors: Tsuda, Takashi; Ando, Nobuo; Mitsuhashi, Naoto; Tanabe, Toyokazu; Itagaki, Kaoru; Soma, Naohiko; Nakamura, Susumu; Hayashi, Narumi; Matsumoto, Futoshi
• Is Part Of: ECS transactions. Volume 80:Number 10(2017)
• Page Start: 1391
• Page End: 1397
• Publication Date: 2017-10-25
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/08010.1391ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : To improve the rate performance of graphite anodes and lithium iron phosphate (LiFePO4 ) cathodes, micrometer-sized through-holes were formed on the electrode surface with a picosecond pulsed laser. The through-holes with 20 mm diameters were uniformly arranged with an opening rate of 1%. Compared with that of non-porous electrodes, the discharge capacities of the porous anode and cathode electrodes did not degrade even at a high current density at a 10 C rate. The formation of through-holes on the electrodes provides a remarkable improvement in the rate performance by enhancing the ability of Li + ions to reach the active material surfaces.