Ternary strategy of 0D/1D/2D composite based on AgNPs/AgNWs/Ti3C2Tx for supercapacitors with high specific capacitance and excellent cyclic stability

MXenes show potential applications in sustainable energy due to their distinct layered structure, large surface area, adjustable surface chemistry and good conductivity, but the big challenge still remains in achieving both high specific capacitance and excellent stability. Herein, ternary strategy of 0D/1D/2D composite was proposed to realize high-performance supercapacitors (SCs) by synergy effect of silver nanoparticles and silver nanowires with Ti 3 C 2 T x . The enhancement in interlayer spacing, specific surface area and electrochemical conductivity resulted in abundant electrochemical active sites and improved ionic accessibility. Therefore, the ternary electrode exhibited excellent specific capacitance and superior cyclic stability, and it showed a specific capacitance of 796.6F g −1 at 2 mV s −1 , more than twice of 387.7F g −1 for Ti 3 C 2 T x . Moreover, the capacitance retention for ternary electrode was 98.2% after 10,000 CV cycles at 50 mV s −1 , comparable to 99.2% for Ti 3 C 2 T x . Furthermore, the symmetric SC with ternary electrode demonstrated specific capacitance of 109F g −1 at 2 mV s −1 with capacitance retention of 96.1% after 10,000 cycles, highlighting great potential for sustainable energy.