Boosting the capacity of MXene electrodes in neutral aqueous electrolytes

Supramolecular Engineering of Ti3C2Tx MXene ‐Perylene Diimide Hybrid Electrodes for the Pseudocapacitive Electrochemical Storage of Calcium Ions

“…[ 19,20 ] However, Ti 3 C 2 T x exhibits capacitive‐type charge storage behavior in neutral aqueous electrolytes, thus limiting charge storage capacities below 20 mAh g −1 . [ 20,21 ] MXene‐based hybrid materials such as MXene@MOFs, [ 22,23 ] MXene@metal oxides [ 24,25 ] and MXene@organic materials [ 26–28 ] were explored for a variety of electrochemical energy storage applications. Most importantly, the top‐down wet chemical etching process introduces negative surface charges and heterogeneous surface functionality (‐OH, ‐O, ‐F, and ‐Cl) to MXenes, which may be exploited for the development of Ti 3 C 2 T x based hybrid electrodes via ionic and hydrogen‐bonding interactions.…”