Effect of polydopamine-modified surface for electrospun LiFePO4 cathode material

15^th Annual Congress on Materials Research & Technology

February 19-20, 2018 | Paris, France

Mi-Ra Shin, Ji-Woong Shin, Jin-Ju Bae, In-Seok Seo, Tae-Whan Hong and Jong-Tae Son

Korea National University of Transportation, Republic of Korea

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Although the attainable specific energy density and cycle stability of LiFePO4 is only higher than that of LiCoO2, LiFePO4 has the low electronic and ionic conductivity. The common strategy to solve this problem was to downsize LiFePO4 and to coating the nano-crystal with conductive carbon film. This study was prepared nano-sized LiFePO4/C cathode material by electrospinning method and surface of manufactured cathode material was fabricated by a facile and cost-effective dip-coating method to improve the interfacial hydrophilic, electrical conductivity and electrochemical performance of electrode. Due to the PDA coating, it makes the nano-fiber surface hydrophilic and thus increases the electrolyte uptake and ionic conductivity, resulting in the enhanced performance of Li-ion batteries. PDA-LiFePO4 and uncoated cathode material were evaluated by contact angle test and uptake volume of liquid electrolyte, AFM, FE-SEM (field emission scanning electron microscope) and electrochemical measurements. The results improved electrochemical performance and hydrophilic property of PDA coated cathode material compared to bare cathode material.

Biography :

Mi-Ra Shin has attendant Korea National University of Transportation and majored in rechargeable batteries and manufactures nanofibers of various compositions using electro-spinning. In addition, she has published more than two papers in a reupted journal.
Email:smr4018@hanmail.net