Article (Scientific journals)
Exploring organo-palladium(II) complexes as novel organometallic materials for Li-ion batteries
Etse, Koffi Senam; Boschini, Frédéric; Karegeya, Claude et al.
2020In Electrochimica Acta
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Keywords :
Oragno-palladium(II) complexes; X-ray diffraction; Electrochemical performance Lithium-ion batteries Conversion reaction
Abstract :
[en] Three novel trans-halogeno(4-acetoxyphenyl)bis(triphenylphosphine)palladium(II) complexes (XPd(4-AcOC6H4)(PPh3)2, with X = I (3), Br (4) and Cl (5)) were synthesized and characterized by spectroscopic techniques and by X-ray diffraction analysis. The SEM images of the particles obtained after synthesis and microwave treatment show uniform morphology and particle size lower than 1 μm for the iodo-palladium complex (3). The electrochemical performance of the palladium-based anode materials was evaluated by cyclic voltammetry and galvanostatic cycling. The results show that the nature of the halogen ligand (X = I, Br and Cl) has a high impact on the reaction mechanism during the first discharge and cycling performance. Thus, the three materials IPd(4-AcOC6H4)(PPh3)2 (3), BrPd(4-AcOC6H4)(PPh3)2 (4) and ClPd(4-AcOC6H4)(PPh3)2 (5) deliver high initial irreversible capacities of 1089, 444 and 684 mAh g−1, respectively, during the first discharge at 20 mA g−1 at a voltage window between 0.03 and 3.0 V. In addition, the iodo-palladium-based anode material shows the highest specific capacity and a high capacity retention after 200 cycles at a current density of 50 mA g−1 with an average discharge capacity of about 170 mAh g−1.
Research center :
GREENMAT
Chimie macromoléculaire et catalyse organique
Disciplines :
Chemistry
Author, co-author :
Etse, Koffi Senam ;  Université de Liège - ULiège > Département de chimie > Chimie macromoléculaire et catalyse organique
Boschini, Frédéric ;  Université de Liège - ULiège > Plateforme APTIS
Karegeya, Claude;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Roex, Edith  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Zaragoza, Guillermo;  Universidade de Santiago de Compostela, Spain > Unidade de Difracción de Raios X > Unidade de Difracción de Raios X
Demonceau, Albert ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Cloots, Rudi ;  Université de Liège - ULiège > Département de chimie (sciences) > Vice-Recteur à la vie étud. et aux infrastr. immobilières
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Language :
English
Title :
Exploring organo-palladium(II) complexes as novel organometallic materials for Li-ion batteries
Publication date :
07 January 2020
Journal title :
Electrochimica Acta
ISSN :
0013-4686
Publisher :
Elsevier, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
“PE Plan Marshall 2.vert” program (BATWAL- 1318146)
Funders :
Région wallonne [BE]
Available on ORBi :
since 16 January 2020

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