Bimetallic MPt (M: Co, Cu, Ni) alloy nanoparticles assembled on reduced graphene oxide as high performance cathode catalysts for rechargable lithium-oxygen batteries

Sevim Bayrak, Melike; FRANCIA, Carlotta; AMICI, Julia; VANKOVA, Svetoslava; SENER, Tansel; Metin, Onder

doi:10.1016/j.jallcom.2016.05.094

Makale Tam Makale Uluslararası 2016

Bimetallic MPt (M: Co, Cu, Ni) alloy nanoparticles assembled on reduced graphene oxide as high performance cathode catalysts for rechargable lithium-oxygen batteries

Melike Sevim Bayrak, Carlotta FRANCIA, Julia AMICI, Svetoslava VANKOVA, Tansel SENER, Onder Metin

JOURNAL OF ALLOYS AND COMPOUNDS Cilt 683 · ss. 231–240 · 25.10.2016

DOI ile aç

Özet

In this work, the performance of bimetallic MPt (M: Co, Cu, Ni) alloy nanoparticles (NPs) assembled on reduced graphene oxide (rGO) as cathode catalysts for rechargable nonaqueous lithium-oxygen (Li-O-2) batteries was investigated. Monodisperse MPt alloy NPs were prepared by using one-pot protocol comprising the thermal decomposition of metal acetylacetonates in the presence of oleylamine (OAm) serving as surfactant, reducing agent and solvent. As-synthesized MPt alloy NPs were then assembled on reduced graphene oxide (rGO) via liquid self-assembly method. Both colloidal MPt alloy NPs and rGO assembled ones were characterized by TEM, XRD and ICP-MS. Next, the cathode performance of rGO-MPt catalysts were evaluated by studying the galvanostatic discharge-charge profiles that were carried out in a Li-O-2 cells using a solution of 0.5 M LiTFSI in DMSO as an electrolyte at an applied current density of 0.05 mA cm(-2). The Li-O-2 cells with rGO-MPt cathode catalysts provide the discharge capacities reaching up to about 9.0 mAh cm(-2). Among three rGO-MPt catalysts tested for the Li-O-2 battery, rGO-Co48Pt52 provided the highest discharge capacity of 9898 mAh g(-1) and 80 cycles at the curtailed capacity of 0.75 mAh cm(-2) whereas the rGO-Ni47Pt53 catalyst showed the most stable cycle-life. (C) 2016 Elsevier B.V. All rights reserved.

Anahtar kelimeler

Reduced graphene oxide platinum bimetallic alloy nanoparticles Electrocatalyst LI CARBON ENHANCED ELECTROCATALYTIC ACTIVITY Lithium-oxygen battery REDUCTION REACTION LI-O-2 BATTERIES BIFUNCTIONAL CATALYST DIMETHYL-SULFOXIDE AIR BATTERIES ELECTROLYTE ARRAYS

Atıf için künye

Sevim Bayrak, M., FRANCIA, C., AMICI, J., VANKOVA, S., SENER, T., & Metin, O. (2016). Bimetallic MPt (M: Co, Cu, Ni) alloy nanoparticles assembled on reduced graphene oxide as high performance cathode catalysts for rechargable lithium-oxygen batteries. JOURNAL OF ALLOYS AND COMPOUNDS, 683, 231–240. https://doi.org/10.1016/j.jallcom.2016.05.094

BibTeX

@article{sevimbayrak2016-56546,
  author = {Sevim Bayrak, Melike and FRANCIA, Carlotta and AMICI, Julia and VANKOVA, Svetoslava and SENER, Tansel and Metin, Onder},
  title = {Bimetallic MPt (M: Co, Cu, Ni) alloy nanoparticles assembled on reduced graphene oxide as high performance cathode catalysts for rechargable lithium-oxygen batteries},
  journal = {JOURNAL OF ALLOYS AND COMPOUNDS},
  year = {2016},
  volume = {683},
  pages = {231--240},
  issn = {0925-8388},
  doi = {10.1016/j.jallcom.2016.05.094},
  url = {https://akademik.atauni.edu.tr/yayinlar/56546-bimetallic-mpt-m-co-cu-ni-alloy-nanoparticles-assembled-on-reduced-graphene}
}