A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode

Abstract

This work presents the effect of different contents of graphene foam (GF) on the electrochemical capacitance of nickel phosphate Ni3(PO4)2 nano-rods as an electrode material for hybrid electrochemical energy storage device applications.

Electrochemical analysis of Na–Ni bimetallic phosphate electrodes for supercapacitor applications

“…3À . 34 Another Raman peaks were observed at about 737, 721, 636, 613, 566 and 473 cm À1 which could be referred to Na-Ni-O. 35,36 I 2D /I G peak ratio is calculated to be equal to $0.97 which is an indication that GF used to form the composite is a few layers.…”

“…35,36 I 2D /I G peak ratio is calculated to be equal to $0.97 which is an indication that GF used to form the composite is a few layers. 34 The pore texture of the NaNi 4 (PO 4 ) 3 and NaNi 4 (PO 4 ) 3 / GF was analyzed by N 2 adsorption/desorption measurements. Fig.…”

Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors

“…here agreeing with what was reported in the literature, the vibration modes could be allocated to Ni-O vibrational modes. 34,35 The peak at about 3528 cm À1 is assigned to a vibration mode of H 2 O. 36 A slight reduction in the intensity of 2D peak was observed in the composite samples as compared to GF sample.…”

Microwave Synthesis of Zinc Ammonium Phosphate/Reduced Graphene Oxide Hybrid Composite for High Energy Density Supercapacitors

“…For example, Mirghni et al. synthesized Ni(PO) 4 nanorods on graphene foam and obtained 48 mAh g −1 at 0.5 A g −1 with a capacity retention of 53% after 10 000 cycles at a current density of 10 A g −1 . Wang et al made a NH 4 CoNiPO 4 ·H 2 O//AC asymmetric device and arrived at an energy density of 46.2 W h kg −1 with stability of 83% of capacity after 3000 cycles at 5 A g −1 .…”