Recent advances on two-dimensional NiFe-LDHs and their composites for electrochemical energy conversion and storage

Liao, Fangfang; Zhao, Xun; Yang, Guiyuan; Cheng, Qihui; Mao, Lei; Chen, Lingyun

doi:10.1016/j.jallcom.2021.159649

Cited by 67 publications

(29 citation statements)

References 253 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the fast development of society and the deterioration of the environment, sustainable and environmentally friendly alternative energy sources are highly desired. − Supercapacitors, with quick charge–discharge, high power density, as well as exceptional cycle stability, have attracted a great deal of attention . Due to the fact that the supercapacitors depend largely on the electrode materials, − a lot of effort has been made in the selection and improvement of materials. − The electrode materials of traditional capacitors are carbon materials, − transition metal oxides, − and conductive polymers. , However, the relatively low power density limited the development of supercapacitors . The current energy storage devices cannot meet the demand for applications in new electronic equipment, hybrid vehicles, and/or large-scale industries .…”

Section: Introductionmentioning

confidence: 99%

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Yang

Hong

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The precursor influences on Ni/Co metal−organic frameworks' (Ni/Co-MOFs') structure and electrochemical performances were studied, and highly enhanced Ni/Co-MOF nanosheets was obtained from a nitrate precursor and named as MN. Compared with the Ni/Co-MOF nanosheets obtained from a chloride precursor under the same concentration (labeled as MC), the nitrate developed MN exhibited a much thinner and crossarranged nanosheets' structure, which contained a higher Ni/Co ratio (MN, 1.82; MC, 1.47). These structural differences led to totally different electrochemical behaviors. At 1 A/g, the MN thinner nanosheets showed a superior specific capacitance of 2860 F/g, which remained above 90% after 2000 cycles. On the contrary, the MC thicker nanosheets had a maximum specific capacitance of 1350 F/g at 1 A/g, and it decreased to around 47% after 500 cycles. With an energy density of 88.84 Wh/kg and a power density of 750.89 W/kg, the MN thinner nanosheets also performed well in asymmetric solid-state supercapacitors.

show abstract

Section: Introductionmentioning

confidence: 99%

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Yang

Hong

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…Layered doubled hydroxides (LDHs) are two‐dimensional (2D) layered materials composed of di‐ and tri‐valent metal cations coordinated to hydroxide ions, and are charge‐balanced by intercalated anions [28–31] . The empty d‐orbital of first‐row transition metals (e. g., Fe, Co, and Ni) can accept the lone‐pair electrons of N 2 , whereby the back‐donation from metal to the anti‐bonding orbitals of N 2 significantly weakens the N≡N triple bond [32–34] .…”

Section: Introductionmentioning

confidence: 99%

“…[27] Layered doubled hydroxides (LDHs) are two-dimensional (2D) layered materials composed of di-and tri-valent metal cations coordinated to hydroxide ions, and are charge-balanced by intercalated anions. [28][29][30][31] The empty d-orbital of first-row transition metals (e. g., Fe, Co, and Ni) can accept the lone-pair electrons of N 2 , whereby the back-donation from metal to the anti-bonding orbitals of N 2 significantly weakens the N�N triple bond. [32][33][34] Compared to the easily aggregated LDH-nanosheets, hollow LDH-nanostructured electrocatalysts with high surface areas can fully expose the active sites and significantly reduce the diffusion length of mass/charge transport.…”

Section: Introductionmentioning

confidence: 99%

Delicate Tuning of the Ni/Co Ratio in Bimetal Layered Double Hydroxides for Efficient N₂ Electroreduction

Zhi

Yang

et al. 2022

ChemSusChem

View full text Add to dashboard Cite

Electroreduction of N 2 to NH 3 at ambient conditions using renewable electricity is promising, but developing efficient electrocatalysts is still challenging due to the inertness of N�N bonds. Layer double hydroxides (LDHs) composed of first-row transition metals with empty d-orbitals are theoretically promising for N 2 electroreduction (NRR) but rarely reported. Herein, hollow NiCo-LDH nanocages with different Ni/Co ratios were prepared, and their electronic structures and atomic arrangements were critical. The synergetic mechanisms of Ni and Co ions were revealed, and the optimized catalytic sites were proposed. Besides, in-situ Raman spectroscopy and 15 N 2 isotopic labeling studies were applied to detect reaction intermediates and confirm the origin of NH 3 . As a result, high NH 3 yield of 52.8 μg h À 1 mg cat À 1 and faradaic efficiency of 11.5 % were obtained at À 0.7 V, which are top-ranking among Co/Ni-based NRR electrocatalysts. This work elucidates the structure-activity relationship between LDHs and NRR and is instructive for rational design of LDH-based electrocatalysts.

show abstract

“…However, the poor electrical conductivity still hinders their further application seriously [5,14]. In order to find promising materials as cathodes for HSCs toward practical applications, researchers have devoted enormous efforts toward designing novel materials or structures with satisfactory electrochemical properties, such as transition metal hydroxides (NiFe layered double hydroxide (LDH)), chalcogenides (Cu 2 MoS 4 , MoSe 2 ), phosphides (Ni 2 P, CoP) and layered MXenes (Ti 3 C 2 ) [15][16][17][18][19]. Among these electrode materials, transition metal phosphides (TMPs) have attracted wide interest, which exhibit high conductivity, high electrochemical activity and metalloid properties because there is no band gap in metal phosphides [20].…”

Section: Introductionmentioning

confidence: 99%

Optimizing nanostructure and constructing heterostructure via Mo/W incorporation to improve electrochemical properties of NiCoP for hybrid supercapacitors

et al. 2022

View full text Add to dashboard Cite

Transition metal phosphides (TMPs) are promising battery-type electrodes for hybrid supercapacitors (HSCs) due to their high electrical conductivity and electrochemical activity. Constructing TMPs with fast kinetics and stable structure is requisite to realize high-performance HSCs but remains a challenge. Herein, we incorporate Mo (or W) into NiCoP to form Ni-Co-Mo-P (or Ni-Co-W-P) heterostructures with a unique three-dimensional (3D) open morphology and modified electronic structure. Electrochemical analyses and density functional theory (DFT) calculations reveal that the incorporation of Mo/W enables NiCoP with optimized nanostructure, high conductivity, abundant reaction active sites and enhanced reaction kinetics. As a result, the designed Ni-Co-Mo-P heterostructure delivers a high areal capacity of 4.08 C cm −2 (703 C g −1 ) at 2 mA cm −2 and 3.25 C cm −2 at 30 mA cm −2 with a good cycling stability, superior to those of NiCoP and Ni-Co-W-P counterparts. The practical feasibility of the Ni-Co-Mo-P heterostructure is further demonstrated by an energy conversion and storage system consisting of commercial solar cell and Ni-Co-Mo-P// activated carbon (AC) device, which could obtain a high energy density of 53.3 W h kg −1 at a power density of 800 W kg −1 . All-solid-state Ni-Co-Mo-P//AC device further illustrates the superior flexibility and makes a strong candidate for wearable energy storage electronics.

show abstract

Recent advances on two-dimensional NiFe-LDHs and their composites for electrochemical energy conversion and storage

Cited by 67 publications

References 253 publications

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Delicate Tuning of the Ni/Co Ratio in Bimetal Layered Double Hydroxides for Efficient N₂ Electroreduction

Optimizing nanostructure and constructing heterostructure via Mo/W incorporation to improve electrochemical properties of NiCoP for hybrid supercapacitors

Contact Info

Product

Resources

About

Recent advances on two-dimensional NiFe-LDHs and their composites for electrochemical energy conversion and storage

Cited by 67 publications

References 253 publications

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Delicate Tuning of the Ni/Co Ratio in Bimetal Layered Double Hydroxides for Efficient N2 Electroreduction

Optimizing nanostructure and constructing heterostructure via Mo/W incorporation to improve electrochemical properties of NiCoP for hybrid supercapacitors

Contact Info

Product

Resources

About

Delicate Tuning of the Ni/Co Ratio in Bimetal Layered Double Hydroxides for Efficient N₂ Electroreduction