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Sammanfattning

Over the past few decades, battery research has increasingly focused on titanium dioxide (TiO2) and manganese dioxide (MnO2), with TiO2 commonly used as an anode material and MnO2 as a cathode, due to their stability, abundance, and low cost. In this study, a novel TiO2-based material doped with high manganese (Mn) content was synthesized via a high-temperature solution-phase synthesis method using a single-source precursor for application in lithium-ion batteries (LIBs). The synthesis was conducted under controlled conditions, achieving high Mn n+ cation doping levels of up to 20-25 mol %, leading to previously unreported changes in the material's electrochemical performance. A temperature-dependent phase transformation from anatase to rutile was observed. Samples with 5 mol %, 20 mol %, and 50 mol % Mn n+-ion doping were prepared and investigated for their structural, morphological, and electrochemical characteristics. Characterization techniques included X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and cyclic voltammetry (CV). The doped materials exhibited properties distinct from those of pure TiO2 and pure MnO2, indicating effective Mn incorporation into the TiO2 lattice. This study highlights the potential of high-Mn-content TiO2-based materials as next-generation anode candidates for LIBs while also revealing the performance limitations associated with excessive Mn doping. The resulting insights into the chemistry of Ti-Mn mixed oxide anodes demonstrate the strong link between molecular precursor design and the resulting phase composition and structure. The latter is directly related to the electrochemical performance, offering a better understanding for future design and engineering of next-generation mixed oxide electrodes.

Publicerad i

Inorganic Chemistry
2025, volym: 64, nummer: 38, sidor: 19296-19305
Utgivare: AMER CHEMICAL SOC

SLU författare

UKÄ forskningsämne

Materialkemi
Oorganisk kemi
Nanoteknisk materialvetenskap

Publikationens identifierare

  • DOI: https://doi.org/10.1021/acs.inorgchem.5c02906

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/143907