Rational La-doped hematite as an anode and hydrous cobalt phosphate as a battery-type electrode for a hybrid supercapacitor

Shaikh, Navajsharif S.; Lokhande, Vaibhav C.; Ji, Taeksoo; Ubale, S.B.; Mane, Vikas J.; Lokhande, C.D.; Shaikh, Haseen; Shaikh, Jasmin S.; Praserthdam, Supareak; Sabale, Sandip; Kanjanaboos, Pongsakorn

doi:10.1039/d1dt04164a

Cited by 7 publications

(2 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11 Likewise, transition-metal phosphates (TMPs) are promising electrode materials showing an important class for SCs as well as many industrial areas because of their openframework structure with large cavities and channels. 12 Moreover, TMPs deliver high capacitance with energy density, excellent ion conductivity, and an extended cycling lifespan. 13 Recently, different redox-active (multiple oxidation states) TMPs such as Co 3 (PO 4 ) 2, 14 Ni 2 P 2 O 7 , 15 Mn 3 (PO 4 ) 2 , 16 VOPO 4 , 17 and Ag 3 PO 4 18 were researched as SC electrode materials.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, diverse active materials have been applied for SCs, for example, transition-metal oxides (TMOs), sulfides, carbon materials, conductive polymers, and metal chalcogenides . Likewise, transition-metal phosphates (TMPs) are promising electrode materials showing an important class for SCs as well as many industrial areas because of their open-framework structure with large cavities and channels . Moreover, TMPs deliver high capacitance with energy density, excellent ion conductivity, and an extended cycling lifespan .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Urea-Assisted Nickel-Manganese Phosphate Composite Microarchitectures with Ultralong Lifecycle for Flexible Asymmetric Solid-State Supercapacitors: A Binder-Free Approach

et al. 2022

View full text Add to dashboard Cite

The limited energy density and cyclability of supercapacitors are major roadblocks to their development as energy storage devices. To address these issues, a binder-free nickel−manganese (Ni−Mn) phosphate composite (NMP series) microarchitecture has been synthesized by the hydrothermal method on a nickel foam (NF) substrate using various urea dosages. Due to the influence of urea, microrod-/microplate-like morphologies of NMP series thin films evolved to micropetals. This study demonstrates a synergy between Ni and Mn metal ions and also the influence of different urea contents on the physicochemical properties of mesoporous NMP series thin films. Notably, the NMP-4 microarchitecture has a large surface area (7.5 m 2 g −1 ), which provides more electroactive sites in electrochemical measurements. Accordingly, in the NMP series electrodes, the NMP-4 thin film demonstrated high electrochemical properties (the maximum specific capacity was found to be 901 C/g at a 5 mV/s scan rate) and retained 127% capacity over 6000 cycles, indicating good durability with a well-preserved microstructure throughout the cycling. Furthermore, a flexible asymmetric solid-state (FASS) supercapacitor was designed utilizing NMP-4 and reduced graphene oxide (rGO) as a cathode and an anode, respectively, in the poly(vinyl alcohol)-KOH (PVA-KOH) gel electrolyte with an extended operational voltage of +1.8 V. This FASS device provides a high specific capacity (192 C/g at 0.6 A/g current density), supreme energy density (48.2 Wh kg −1 ) at a power density of 575 W kg −1 , and a desirable longevity of 108% over 5000 cycles. Moreover, the FASS device also demonstrated its practical applicability. The long-term stability suggests that the binder-free urea-assisted Ni−Mn phosphate composite is a good candidate for energy storage devices.

show abstract