Recently, Professor Peng Dongliang from the School of Materials of Xiamen University and Associate Professor Wei Xiaolong's team published important research results in Nature Communication, proposing a new mechanism of "electrochemical driving partial dissolution of solvated structures, the charge storage capacity of porous carbon anode is significantly improved, and the performance of sodium ion capacitor is promoted to achieve a leap-forward breakthrough.

By regulating the desolvation behavior of solvated sodium ions in sodium-based ether electrolytic liquid, the team efficiently enters the porous carbon nano pore channel and carries out electric double layer capacitance adsorption, therefore, the energy density is greatly improved while maintaining the advantages of fast charging and discharging and long cycle of the super capacitor. The specific capacity of porous carbon anode prepared based on this mechanism reaches 508cc/g, far exceeding commercial super capacitor electrode materials (about 135cc/g).

The hybrid sodium ion capacitor soft pack assembled with this negative electrode is cell, and the energy density reaches 40 kWh/kg, which is about 4 times higher than the current commercial supercapacitors, and has 70 seconds extreme charging, the long service life feature of 30000 cycles. The device does not need complex pretreatment, the process is simplified, and the cost is low. Similation energy storage. High power demand scenarios such as AI computing centers provide competitive solutions.