Green synthesis of nickel‐manganese/polyaniline‐based ternary composites for high‐performance supercapattery devices

Abstract

Summary The study divulges formation of nickel‐manganese phosphate and polyaniline (NiMn(PO4)2‐PANI)‐based ternary composites at different aspect ratios, synthesized via facile sonochemical method. The composite is utilized for high‐performance energy storage applications. The composite with 30 wt% PANI depicts the best electrochemical performance with maximum specific capacity (Qs) of 847 C g−1 at 0.5 A g−1 in three‐electrode assembly. The supercapattery device is assembled by utilizing NiMn(PO4)2‐PANI and activated carbon. The supercapattery demonstrates outstanding performance by delivering a remarkable specific energy of 71.3 Wh kg−1, and the maximum specific power is 12 686 W kg−1 and capacity retention of 97.6% after 5000 GCD series. Furthermore, the diffusive and capacitive mechanism is evaluated by applying Dunn's model. The b values are calculated to confirm the hybrid nature of the device. The study depicts the potentials of reported ternary composites as self‐supported electrode materials in the development of cost‐effective and efficient energy storage system.

Investigation of magnetron sputtered Ni@Cu/ WS 2 as an electrode material for potential supercapattery devices

“…A hybrid device with intermediate characteristics of both EDLCs and SBs is therefore fabricated. In this fabrication, a capacitive and a battery‐grade electrode parted by a separator (Whatman paper) are combined in a single device called supercapattery 17‐21 . Owing to the presence of ions adsorption and desorption (supported by capacitive electrode) and Faradic redox reactions (provided by battery‐grade electrode material), these devices exhibit enhanced specific energy and power results 22‐25 …”

“…In this fabrication, a capacitive and a battery-grade electrode parted by a separator (Whatman paper) are combined in a single device called supercapattery. [17][18][19][20][21] Owing to the presence of ions adsorption and desorption (supported by capacitive electrode) and Faradic redox reactions (provided by battery-grade electrode material), these devices exhibit enhanced specific energy and power results. [22][23][24][25] For the high performance of these asymmetric devices, electrode materials with vibrant electrochemical features are strongly desired.…”

Enhanced electrochemical performance of battery‐grade cobalt phosphate via magnetron sputtered copper interfacial layer for potential supercapattery applications

“…The electrochemical activities and chemical stability of transition metal phosphates highlight their precise status among these electrode materials 5,28 . Among different metal phosphate, 29 cobalt phosphate is mostly utilized positive electrode materia 30 . Theerthagiri et al synthesized hierarchical cobalt phosphate nanoflakes and report a specific capacitance (C s ) of 210 F/g 31 .…”

Exploring the electrochemical performance of copper-doped cobalt–manganese phosphates for potential supercapattery applications

“…[23][24][25][26][27][28] Among these materials, metal phosphates and phosphides have been explored as suitable candidates. 29 Their low cost, chemical stability, redox-active nature, and excellent electrochemical properties make them more feasible for efficient SC devices. 30 Among various phosphates and phosphides, manganese and cobalt phosphates are intensively studied for SC applications due to high capacitance, thermal and electrochemical stability, and excellent electrochemical activities.…”