Conventional and Microwave-Assisted Solvothermal Synthesis, Characterization, and Optimization of the High-Voltage Cathode Material LiCoPO<sub>4</sub> for Lithium-Ion Batteries

Ludwig, Jennifer

Jennifer Ludwig

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Original title:: Conventional and Microwave-Assisted Solvothermal Synthesis, Characterization, and Optimization of the High-Voltage Cathode Material LiCoPO₄ for Lithium-Ion Batteries
Translated title:: Konventionelle und Mikrowellen-assistierte Solvothermalsynthese, Charakterisierung und Optimierung des Hochvolt-Kathodenmaterials LiCoPO₄ für Lithium-Ionen-Batterien
Author:: Ludwig, Jennifer
Year:: 2017
Document type:: Dissertation
Faculty/School:: Fakultät für Chemie
Advisor:: Nilges, Tom (Prof. Dr.)
Referee:: Nilges, Tom (Prof. Dr.); Gasteiger, Hubert A. (Prof. Dr.); Weihrich, Richard (Prof. Dr.); Fischer, Richard (Prof. Dr.)
Language:: en
Subject group:: CHE Chemie
Keywords:: lithium cobalt phosphate, metastable compounds, microwave-assisted solvothermal synthesis, particle size and morphology control, lithium-ion batteries
Translated keywords:: Lithiumcobaltphosphat, metastabile Verbindungen, Mikrowellen-assistierte Solvothermalsynthese, Partikelgrößen- und Morphologiekontrolle, Lithium-Ionen-Batterien
TUM classification:: CHE 380d
Abstract:: The olivine-type high-voltage cathode material LiCoPO₄ is a promising candidate for next-generation lithium-ion batteries, but generally exhibits low capacities and poor cycle life. This thesis presents simple and fast microwave-assisted solvothermal synthesis pathways towards particle size- and morphology-tuned LiCoPO₄ materials with cutting-edge electrochemical performances. In addition, the structure–property relationships of metastable, non-olivine LiCoPO₄ polymorphs and two novel mixed-valent Co(II,III) phases are investigated. «
The olivine-type high-voltage cathode material LiCoPO₄ is a promising candidate for next-generation lithium-ion batteries, but generally exhibits low capacities and poor cycle life. This thesis presents simple and fast microwave-assisted solvothermal synthesis pathways towards particle size- and morphology-tuned LiCoPO₄ materials with cutting-edge electrochemical performances. In addition, the structure–property relationships of metastable, non-olivine LiCoPO₄ polymorphs and two novel mixed-vale... »
Translated abstract:: Das Phosphoolivin LiCoPO₄ gilt als vielversprechendes Hochvolt-Kathodenmaterial für Lithium-Ionen-Batterien der nächsten Generation, zeigt jedoch im Allgemeinen geringe Kapazitäten und Zyklenstabilitäten. Im Rahmen dieser Arbeit werden einfache und schnelle Mikrowellen-assistierte Solvothermalsyntheserouten zu Partikelgrößen- und Morphologie-optimierten LiCoPO₄-Materialien mit hervorragenden elektrochemischen Eigenschaften vorgestellt. Ferner werden die Struktur-Eigenschafts-Beziehungen metastabiler LiCoPO₄-Polymorphe sowie zweier neuer, gemischtvalenter Co(II,III)-Phasen untersucht.
WWW:: https://mediatum.ub.tum.de/?id=1363586
Date of submission:: 12.07.2017
Oral examination:: 27.09.2017
File size:: 90681762 bytes
Pages:: 386
Urn (citeable URL):: https://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:91-diss-20170927-1363586-1-3
Last change:: 27.09.2018
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