Nickel tetrathiooxalate as a cathode material for potassium batteries |
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| Institution: | 1. Skolkovo Institute of Science and Technology, 121205 Moscow, Russian Federation;2. Perm State University, 614990 Perm, Russian Federation;3. Institute of Technical Chemistry, Ural Branch of the Russian Academy of Sciences, 614013 Perm, Russian Federation;4. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation;5. Silesian University of Technology, 44–100 Gliwice, Poland |
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| Abstract: | We report a nickel tetrathiooxalate (NiTTO) coordination polymer as a cathode material for potassium batteries. In a potential range of 1.3–3.6 V vs. K+/K, the specific capacity of the material is 209 mA h g?1 at a current density of 0.1 A g?1, which roughly corresponds to the two-electron reduction of polymer repeating units. The charge–discharge mechanisms of NiTTO in potassium cells were examined using operando Raman spectroscopy. |
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| Keywords: | energy storage K-ion batteries cathode materials conductive polymers coordination polymers |
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