Facile strategy of using conductive additive supported NaMnPO4 nanoparticles for delivering high performance Na-ion supercapacitors

A novel strategy of incorporating conducting additive to enhance the performance of NaMnPO4-based Na-ion supercapacitors is presented. It is observed that forming composite with a conducting polymer, leads to nearly two-fold increment in the specific capacitance of a Na-ion based system. The higher conductivity, fast Faradaic response alongside with greater number of ion transport channels lead to this improvement. Here, the best performance is obtained at an optimized polyaniline (PANi) percentage of 30 wt%, where a specific capacitance of 201 F g(-1) at 1 A g(-1) current density was observed. This is more than twice the value obtained by pure NaMnPO4. The fabricated supercapacitors also deliver 26.5 W h kg(-1) specific energy and high cycling stability. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

A novel strategy of incorporating conducting additive is proposed to enhance the performance of NaMnPO4-based Na-ion supercapacitors. It is observed that forming a composite with a conducting polymer leads to a nearly two-fold increment in the specific capacitance of the Na-ion based system. This improvement is attributed to higher conductivity, fast Faradaic response, and greater number of ion transport channels.