A stable aqueous ammonium ion hybrid supercapacitor based on pre-intercalated MnOx electrodes and ammonium sulphate electrolyte

Extrinsic pseudocapacitive ultrathin 2D MoS2 nanoflakes clamped on 1D Sb2S3 nanorods: an advanced heterostructured anode for high-energy ammonium ion hybrid capacitors

“…As can be seen in the Ragone plot, the AIHC delivered a maximum energy density of 43.75 W h kg −1 at a power density of 600 W kg −1 , which is comparable with those previously reported for AIHCs and supercapacitors. 9,15,20,63–67 In addition, a 5-fold increase in power density was observed; the AIHC achieved a power density of 3000 W kg −1 at an energy density of 35.77 W h kg −1 , indicating high reversibility and a rapid transmission of the charge carriers. Also, the long-term cycling performance of the AIHC was determined, because this is a crucial feature of energy-storage devices and is essential for commercial consideration.…”

“…Furthermore, an AIHC fabricated by integrating MnO 2 as the cathode and Sb 2 S 3 /MoS 2 as the anode exhibited excellent a high energy density and stability, which represented a substantial improvement over previously reported carbon-anode containing AIHCs. 15,20…”

Ammonium and Tartrate Salts as Alternatives to Neutral Aqueous Electrolytes for Supercapacitors

“…This superior conductivity of ammonium salts compared to sodium ones could be explained by the size of the hydrated cations. The size of hydrated ammonium cations (3.31 Å) [52,53] is in the same range as that for hydrated potassium cations (3.34 Å) and smaller than for hydrated sodium cations (3.59 Å). [54] Moreover, slightly lower conductivities are observed with the tartrate anions.…”

An ammonium vanadate/MXene nanocomposite for high-performance ammonium ion storage

“…NVO//AC (QSHSC) 14 1 M NH 4 Cl/PVA 1.8 324 mF cm −2 @1 mA cm −2 71%/14 000 9.16 W h kg −1 @15.9 W kg −1 VOH//PTCDI (QSHSC) 32 PVA/NH 4 Cl 1.5 411 mF cm −2 @1 mA cm −2 78%/10 000 10.6 W h kg −1 @28.9 W kg −1 VOH-PEDOT//AC 42 1 M PVA/NH 4 Cl 1.6 328 mF cm −2 @1 mA cm −2 52%/10 000 10.4 W h kg −1 @35.7 W kg −1 PDI-Ph//ATA (BSH) 49 30 M NH 4 AC 2.0 42 mA h g −1 @200 mA g −1 63%/5000 16.5 W h kg −1 @719 W kg −1 NH x WO 3 //a-MnO 2 (ref. 50) 2 M NH 4 AC 1.8 2239.7 mF cm −2 @2 mA cm −2 78.6%/13 600 1010.1 mW h cm −2 @18 mW cm −2 MoO 3 @C//MoO 3 @C (symmetric ASC) 51 (NH 4 ) 2 SO 4 -gel 1.8 173.8 F g −1 @1 A g −1 97.6%/10 000 78.3 W h kg −1 @929 W kg −1 MoS 2 @TiN/CNTF//MnO 2 /CNTF (QSHSC) 52 1.0 M NH 4 Cl 2.0 351.2 mF cm −2 @2 mA cm −2 82%/10 000 195.1 mW h cm −2 @2 mW cm −2 K-MnO x //AC 13 1.0 M (NH 4 ) 2 SO 4 1.6 85 F g −1 @1 A g −1 90%/5000 15.93 W h kg −1 @2148 W kg −1 NH 4 V 3 O 8 -MXene//MXene (this work) uoride (500 mg) and 9 M HCl (20 ml). 0.5 g of MAX powder (particle size of 25 mm) was added to the etchant solution at 35 °C and allowed to react for 12 hours.…”