Electrochemical investigations on organometallic compounds containing group 14 elements

Judith Maja Biedermann

Research output: ThesisDiploma ThesisResearch

Abstract

In this work mainly the influence of octaphenyl-cyclotetrasilane (Si4Ph8) and decaphenyl-cyclopentasilane (Si5Ph10) on the capacity of graphite in lithium-ion half-cells has been tested. For this purpose, the silanes were pretreated differently depending on the preparation procedure of the electrodes used. Pretreatments included pyrolysis of the silanes, mixing and/or ball-milling of the same with graphite, polymeric binder, carbon and solvent. Also, first experiments on the influence of aryl-substituted stannanes such as mesityltin trihydride (MesSnH3) or naphthyltin trihydride (NaphSnH3, with and without in situ polymerization by the amine base tetramethylethylenediamine (TMEDA)) and perphenylated germanium rings (octaphenyl-cyclotetragermane Ge4Ph8, decaphenyl-cyclopentagermane Ge5Ph10) on the capacity of graphite were performed. Furthermore, synthesis of dichloro-(1-naphthyl)(phenyl)silane as a precursor material to cyclic polysilanes was conducted.
Schlagwörter novel anode materials for Li-ion batteries; polystannanes; cyclopolysilanes; cyclopolygermanes
Original languageEnglish
Supervisors/Advisors
  • Uhlig, Frank, Supervisor
  • Hanzu, Ilie, Advisor
Publication statusPublished - 17 Dec 2014

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Organometallic Compounds
Silanes
Graphite
Polysilanes
Germanium
Ball milling
Lithium
Amines
Binders
Anodes
Pyrolysis
Carbon
Polymerization
Ions
Electrodes
Experiments

Keywords

  • novel anode materials for Li-ion batteries
  • polystannanes
  • cyclopolysilanes
  • cyclopolygermanes

Cite this

Electrochemical investigations on organometallic compounds containing group 14 elements. / Biedermann, Judith Maja.

2014. 53 p.

Research output: ThesisDiploma ThesisResearch

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N2 - In this work mainly the influence of octaphenyl-cyclotetrasilane (Si4Ph8) and decaphenyl-cyclopentasilane (Si5Ph10) on the capacity of graphite in lithium-ion half-cells has been tested. For this purpose, the silanes were pretreated differently depending on the preparation procedure of the electrodes used. Pretreatments included pyrolysis of the silanes, mixing and/or ball-milling of the same with graphite, polymeric binder, carbon and solvent. Also, first experiments on the influence of aryl-substituted stannanes such as mesityltin trihydride (MesSnH3) or naphthyltin trihydride (NaphSnH3, with and without in situ polymerization by the amine base tetramethylethylenediamine (TMEDA)) and perphenylated germanium rings (octaphenyl-cyclotetragermane Ge4Ph8, decaphenyl-cyclopentagermane Ge5Ph10) on the capacity of graphite were performed. Furthermore, synthesis of dichloro-(1-naphthyl)(phenyl)silane as a precursor material to cyclic polysilanes was conducted. Schlagwörter novel anode materials for Li-ion batteries; polystannanes; cyclopolysilanes; cyclopolygermanes

AB - In this work mainly the influence of octaphenyl-cyclotetrasilane (Si4Ph8) and decaphenyl-cyclopentasilane (Si5Ph10) on the capacity of graphite in lithium-ion half-cells has been tested. For this purpose, the silanes were pretreated differently depending on the preparation procedure of the electrodes used. Pretreatments included pyrolysis of the silanes, mixing and/or ball-milling of the same with graphite, polymeric binder, carbon and solvent. Also, first experiments on the influence of aryl-substituted stannanes such as mesityltin trihydride (MesSnH3) or naphthyltin trihydride (NaphSnH3, with and without in situ polymerization by the amine base tetramethylethylenediamine (TMEDA)) and perphenylated germanium rings (octaphenyl-cyclotetragermane Ge4Ph8, decaphenyl-cyclopentagermane Ge5Ph10) on the capacity of graphite were performed. Furthermore, synthesis of dichloro-(1-naphthyl)(phenyl)silane as a precursor material to cyclic polysilanes was conducted. Schlagwörter novel anode materials for Li-ion batteries; polystannanes; cyclopolysilanes; cyclopolygermanes

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KW - cyclopolysilanes

KW - cyclopolygermanes

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