scholarly journals High valence state metal-ion doped Fe-Ni layered double hydroxide for oxygen evolution electrocatalyst and asymmetric supercapacitors

2022 ◽  
Author(s):  
Wenke Shao ◽  
Qiufan Wang ◽  
Can Huang ◽  
Daohong Zhang
Keyword(s):  
Energy Storage ◽  
Layered Double Hydroxide ◽  
Metal Ion ◽  
Energy Storage Materials ◽  
Asymmetric Supercapacitors ◽  
One Dimensional ◽  
Nickel Iron ◽  
Multiple Components ◽  
High Valence State ◽  
Double Hydroxide

Delicate design of nanostructures consisting of multiple components is an important strategy for energy storage materials. In this work, cobalt-doped nickel-iron layered double hydroxide (Fe-Ni3Co2 LDH) assembling from one-dimensional (1D)...

Hybrid Co3O4/Co9S8 Nanowires for High-Performance Asymmetric Supercapacitors

2020 ◽  
Vol 15 (2) ◽  
pp. 237-242 ◽  
Author(s):  
Yongli Tong ◽  
Xinyu Cheng ◽  
Xiaoyun Liu ◽  
Dongli Qi ◽  
Baoqian Chi ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Nickel Foam ◽  
High Specific Capacitance ◽  
Energy Storage Materials ◽  
Step Method ◽  
Asymmetric Supercapacitors ◽  
One Dimensional ◽  
Prepared Material ◽  
Vulcanization Process

We successfully synthesize hierarchical Co3O4@Co9S8 nanowires on nickel foam by a facile two-step method. The as-prepared samples show one-dimensional nanowires decorated with uneven surface after vulcanization process with pure Co3O4 nanowires to form Co3O4 @Co9S8 composite, which exhibit high specific capacitance of 2667 F g–1 at 12 A g–1, maintaining 76.78% capacitance retention of initial capacitance. The assembled asymmetric supercapacitor (ASC) device shows excellent capability of energy storage and power output with an energy density of 267.9 mW h cm–3 at power density of 7.5 W cm–3 and 187.5 mW h cm–3 at 15 W cm–3. In addition, it exhibits excellent cycling capability with 84.2% retention after 6000 cycles. Therefore, the as-prepared material can be used as promising energy storage materials.

A Novel Nickel/Iron-Layered Double Hydroxide for Supercapacitors

2014 ◽  
Vol 665 ◽  
pp. 115-118 ◽  
Author(s):  
Zhe Kang ◽  
Ting Xiao ◽  
Xin Yu Tan ◽  
Peng Xiang ◽  
Li Hua Jiang
Keyword(s):  
Electrochemical Performance ◽  
Layered Double Hydroxide ◽  
Cyclic Voltammogram ◽  
Step Method ◽  
Asymmetric Supercapacitors ◽  
Nickel Iron ◽  
One Step ◽  
Double Hydroxide

A facile one-step method of growing nickel/iron layered double hydroxide (Ni/Fe-LDH) films with nanosheet structures on Ti sheet is presented and the electrochemical performance is investigated. Cyclic voltammogram of Ni/Fe-LDH electrode shows a pair of well-defined redox peaks at-0.4~-1.4 V, which is quite different with the previous reports on LDHs used for supercapacitors. This result implies the Ni/Fe-LDH may be an alternative for the cathode of the asymmetric supercapacitors.

scholarly journals Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Panlong Zhai ◽  
Mingyue Xia ◽  
Yunzhen Wu ◽  
Guanghui Zhang ◽  
Junfeng Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Density Functional ◽  
Rational Design ◽  
Single Atom ◽  
Nickel Iron ◽  
Double Hydroxide

AbstractRational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control of active sites is essential for electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding of catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru1/D-NiFe LDH). Under precise regulation of local coordination environments of catalytically active sites and the existence of the defects, Ru1/D-NiFe LDH delivers an ultralow overpotential of 18 mV at 10 mA cm−2 for hydrogen evolution reaction, surpassing the commercial Pt/C catalyst. Density functional theory calculations reveal that Ru1/D-NiFe LDH optimizes the adsorption energies of intermediates for hydrogen evolution reaction and promotes the O–O coupling at a Ru–O active site for oxygen evolution reaction. The Ru1/D-NiFe LDH as an ideal model reveals superior water splitting performance with potential for the development of promising water-alkali electrocatalysts.

scholarly journals Pre-treatment of desalination feed seawater by Jordanian Tripoli, Pozzolana, and Feldspar: Batch experiments

2011 ◽  
Vol 17 (2) ◽  
pp. 163-171 ◽  
Author(s):  
Aiman Al-Rawajfeh ◽  
Khaldoon Al-Whoosh ◽  
Dwairi Al ◽  
Ahmad Al-Maaberah ◽  
Amer Tarawneh
Keyword(s):  
Layered Double Hydroxide ◽  
Metal Ion ◽  
Raw Materials ◽  
Batch Experiments ◽  
Initial Concentration ◽  
Considerable Potential ◽  
Ion Concentrations ◽  
Pre Treatment ◽  
Co Precipitation ◽  
Double Hydroxide

In this research, composites of layered double hydroxide (LDH) with three Jordanian natural raw materials; Tripoli (T), Pozzolana (P) and Feldspar (F) were prepared by co-precipitation and have been used for feed seawater pre-treatment. The data reveals that percent adsorption decreased with increase in initial concentration, but the actual amount of adsorbed ions per unit mass of LDH/T-P-F increased with increase in metal ion concentrations. The values of ?Go were negative and within 21 to 26 KJ/mol, while the values of ?Ho and ?So were positive and within the range of 0.1 to 25 KJ/mol. The values of ?H?, ?S?, and ?G? indicate the favorability of physisorption and show that the LDH/T-P-F composites have a considerable potential as adsorbents for the removal of ions from seawater.

Ultrathin nickel–iron layered double hydroxide nanosheets intercalated with molybdate anions for electrocatalytic water oxidation

2015 ◽  
Vol 3 (31) ◽  
pp. 16348-16353 ◽  
Author(s):  
Na Han ◽  
Feipeng Zhao ◽  
Yanguang Li
Keyword(s):  
Layered Double Hydroxide ◽  
Water Oxidation ◽  
Nickel Iron ◽  
Ultrathin Nanosheets ◽  
Double Hydroxide

Incorporation of molybdate ions into a NiFe-LDH structure leads to the formation of ultrathin nanosheets with enhanced OER performance.

scholarly journals Fatty acid/metal ion composite as thermal energy storage materials

2020 ◽  
Vol 2 (5) ◽  
Author(s):  
Yathin Krishna ◽  
Navid Aslfattahi ◽  
R. Saidur ◽  
M. Faizal ◽  
K. C. Ng
Keyword(s):  
Fatty Acid ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Metal Ion ◽  
Energy Storage Materials ◽  
Storage Materials

scholarly journals Introducing Fe2+ into Nickel-Iron Layered Double Hydroxide: Local Structure Modulated Water Oxidation Activity

2018 ◽  
Vol 57 (30) ◽  
pp. 9392-9396 ◽  
Author(s):  
Zhao Cai ◽  
Daojin Zhou ◽  
Maoyu Wang ◽  
Seong-Min Bak ◽  
Yueshen Wu ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Water Oxidation ◽  
Local Structure ◽  
Oxidation Activity ◽  
Nickel Iron ◽  
Double Hydroxide

Partially amorphous nickel–iron layered double hydroxide nanosheet arrays for robust bifunctional electrocatalysis

2018 ◽  
Vol 6 (33) ◽  
pp. 16121-16129 ◽  
Author(s):  
Junfeng Xie ◽  
Haichao Qu ◽  
Fengcai Lei ◽  
Xu Peng ◽  
Weiwei Liu ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Layered Double Hydroxide ◽  
Fuel Production ◽  
Multiple Targets ◽  
Clean Fuel ◽  
Practical Applications ◽  
Nickel Iron ◽  
Nanosheet Arrays ◽  
Pollution Treatment ◽  
Double Hydroxide

Bifunctional electrocatalysts that can boost energy-related reactions are urgently in demand for pursual of dual and even multiple targets towards practical applications such as energy conversion, clean fuel production and pollution treatment.

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