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나노입자 연구단
나노입자 연구단
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Lithium manganese phosphate-carbon composite as a highly active and durable electrocatalyst for oxygen reduction reaction

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Title
Lithium manganese phosphate-carbon composite as a highly active and durable electrocatalyst for oxygen reduction reaction
Author(s)
Myeong Jae Lee; Jin Soo Kang; Ahn D.; Dong Young Chung; Subin Park; Yoon Jun Son; Ji Mun Yoo; Heejong Shin; Kang Y.S.; Sung N.-E.; Lee K.-S.; Yung-Eun Sung
Publication Date
2017-08
Journal
ELECTROCHIMICA ACTA, v.245, no., pp.219 - 226
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Development of Pt-free electrocatalysts for oxygen reduction reaction (ORR) is one of the most important tasks for fuel cell commercialization. Various Mn compounds have been proposed as catalysts for ORR, but poor activity and stability necessitate further advances for their practical utilization. In this study, we demonstrate a lithium manganese phosphate-carbon composite (LMP-C) as a highly active and durable electrocatalyst for ORR in alkaline medium. LMP-C, synthesized by the solid-state method, exhibited significantly enhanced electrical conductivity and electrochemical properties, which led to a substantial increase in ORR performance. Comparison between LMP-C and the manganese phosphate-carbon composite, based on various physicochemical characterizations, revealed a high preference for the formation of the Mn3+ state on the surface of LMP-C that resulted in effective charge transfer during oxygen reduction. Moreover, the excellent stability of LMP-C was confirmed by carrying out 3000 cycles of the accelerated durability test, in which no drop in ORR performance was observed. © 2017 Elsevier Lt
URI
https://pr.ibs.re.kr/handle/8788114/4240
ISSN
0013-4686
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
10. Lee_et_al-2017-Electrochimica_Acta.pdfDownload

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