Johannes Döhn

• Master of Science
• Doctorate at Ulm University

Chloride–ion batteries (CIBs) offer a compelling alternative to conventional battery systems, particularly in applications demanding cost‐effectiveness and resource sustainability. However, the development of tailored electrode materials remains a critical bottleneck for CIB advancement. In this study, an untapped class of perovskite‐based material...

Chloride ion batteries (CIBs) offer a compelling alternative to lithium-ion systems, particularly in applications demanding cost-effectiveness and resource sustainability. However, the development of tailored electrode materials remains a critical bottleneck for CIB advancement. In this study, we synthesized an untapped class of perovskite-based ma...

Conversion of CO2 to hard carbon is an interesting technology for the removal of carbon dioxide from the atmosphere. Recently, it was shown that CeO2 can selectively catalyze this reaction, but we still lack information regarding the reaction mechanism. Using density functional theory modeling, we explore possible reaction mechanisms that allow for...

In the pursuit of more affordable battery technologies, potassium-ion batteries (KIBs) have emerged as a promising alternative to lithium-ion systems, owing to the abundance and wide distribution of potassium resources....

Conversion of CO2 to hard carbon is an interesting technology for the removal of carbon dioxide from the atmosphere. Recently, it was shown that CeO2 can selectively catalyse this reaction but we still lack information regarding the reaction mechanism. Using density functional theory (DFT) modelling we explore possible reaction mechanisms that allo...

The reduction of CO 2 is a promising route for the synthesis of renewable energy carriers and the removal of CO 2 from the atmosphere to limit global warming. These negative emission technologies (NETs) require the conversion of carbon dioxide into a stable and easily storable form[1]. However, despite its potential, the development of suitable CO...

Ion mobility in electrolytes and electrodes is an important performance parameter in electrochemical devices, particularly in batteries. In this review, the authors concentrate on the charge carrier mobility in crystalline battery materials where the diffusion basically corresponds to hopping processes between lattice sites. However, in spite of th...

The electrification of the transportation sector exacerbates all issues concerning the use of critical materials in state‐of‐the‐art batteries and, therefore, urges the development of new technologies based on potentially greener and more abundant materials. One research trend is the substitution of Li as shuttle ion with other elements such as Na,...

The electrification of the transportation sector exacerbates all issues concerning the use of critical materials in state-of-the-art batteries and, therefore, urges the development of new technologies based on potentially greener and more abundant materials. One research trend is the substitution of Li as shuttle ion with other elements such as Na,...

Ion mobility in electrolytes and electrodes is an important performance parameter in electrochemical devices, particularly in batteries. In this review, we concentrate on the charge carrier mobility in crystalline battery materials where the diffusion basically corresponds to hopping processes between lattice sites. However, in spite of the seem- i...

Conversion of CO2 to hard carbon is an interesting technology for the removal of carbon dioxide from the atmosphere. Recently, it was shown that CeO2 can selectively catalyse this reaction but we still lack information regarding the reaction mechanism. Using density functional theory (DFT) modelling we explore possible reaction mechanisms that allo...

Mg batteries with oxide cathodes have the potential to significantly surpass existing Li-ion technologies in terms of sustainability, abundance, and energy density. However, Mg intercalation at the cathode is often severely hampered by the sluggish kinetics of Mg$^{2+}$ migration within oxides. Here we report a combined theoretical and experimental...