Synthesis, characterization and formulation of a cathode active material: Copper nitroprusside

Mullaliu, Angelo (2015) Synthesis, characterization and formulation of a cathode active material: Copper nitroprusside. [Laurea magistrale], Università di Bologna, Corso di Studio in Chimica industriale [LM-DM270]
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Nowadays, rechargeable Li-ion batteries play an important role in portable consumer devices. Formulation of such batteries is improvable by researching new cathodic materials that present higher performances of cyclability and negligible efficiency loss over cycles. Goal of this work was to investigate a new cathodic material, copper nitroprusside, which presents a porous 3D framework. Synthesis was carried out by a low-cost and scalable co-precipitation method. Subsequently, the product was characterized by means of different techniques, such as TGA, XRF, CHN elemental analysis, XRD, Mössbauer spectroscopy and cyclic voltammetry. Electrochemical tests were finally performed both in coin cells and by using in situ cells: on one hand, coin cells allowed different formulations to be easily tested, on the other operando cycling led a deeper insight to insertion process and both chemical and physical changes. Results of several tests highlighted a non-reversible electrochemical behavior of the material and a rapid capacity fading over time. Moreover, operando techniques report that amorphisation occurs during the discharge.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Mullaliu, Angelo
Relatore della tesi
Correlatore della tesi
Corso di studio
Parole chiave
copper nitroprusside Prussian blue cathode battery operando in situ
Data di discussione della Tesi
24 Luglio 2015

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