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Boron Quantum Dots Pillared Ti C T Membrane Electrode with High Rate Performance for Supercapacitor. | LitMetric

Boron Quantum Dots Pillared Ti C T Membrane Electrode with High Rate Performance for Supercapacitor.

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Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, P. R. China.

Published: March 2024

A sonication-assisted liquid-phase preparation technique is developed to prepare boron quantum dots (BQDs) with a lateral size of 3 nm in a solution of NMP and NBA; it shows a direct bandgap semiconductor with a bandgap of 3 eV and a specific capacitance of 41 F g . A BQDs(10)-Ti C T membrane electrode with excellent capacitance and high flexibility is prepared by using Ti C T nanosheets (NSs) as assembled units and BQDs as pillar; it gives a specific capacitance of 524 F g at 1 A g in 6 m H SO electrolyte, a high capacity retention of 75%, and a minimum relaxation time of 0.51 s. An all-solid-state BQDs(10)-Ti C T flexibility supercapacitor is assembled by using a BQDs(10)-Ti C T membrane as electrodes and PVA/H SO hydrogel as electrolyte; it not only shows an area specific capacitance of 552 mF cm at 1.25 mA cm , a retention rate of 75%, a capacity retention of 93% after 5000 cycles, and an energy density of 40.4 Wh cm at a volume power density of 416 W cm , but also provides superior flexibility and can be bent to different degrees, showing that the assembled BQDs(10)-Ti C T membrane electrode and BQDs(10)-Ti C T flexible supercapacitor display broad application prospects in field of portable/wearable electronic devices.

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Source
http://dx.doi.org/10.1002/smll.202306562DOI Listing

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