Lithium-ion batteries (LIBs) are primarily used for advanced portable electronic devices and automotive electrical energy storage (EES) systems. However, the cost disadvantage and global scarcity of lithium resources restrict the LIBs for widespread and cost efficient large scale applications. Recently, sodium-ion (Na-ion) and potassium-ion (K-ion) batteries have received considerable attention as a potential post-lithium ion energy storage device due to their low cost and abundance. Anatase titanium dioxide (TiO2) is widely used as an anode material in commercial LIBs due to its reasonably low insertion potential (~ 1.7 V vs. Li/Li+), relatively high capacity (335.6 mAh/g) and small volume change (&lt; 4%) upon the Li-ion insertion reaction. And also in NIBs, TiO2 anode materials have achieved a huge success with quiet good cycling stability and relatively high rate performance. Considering TiO2’s encouraging success on Li-ion and Na-ion battery can give inspiration to use of anode materials for potassium-ion batteries. Herein, we for the first time report on the potassium ion storage mechanism of TiO2 for anode materials for PIBs. More details on the synthetic procedure, electrochemical and structural properties will be presented at the meeting.

Electrochemical phase transformation of anatase TiO2 to magneli Ti6O11 for potassium ion battery

256th National Meeting (2018)

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