One-Step Fabrication of Ultrathin Porous Nickel Hydroxide-Manganese Dioxide Hybrid Nanosheets for Supercapacitor Electrodes with Excellent Capacitive Performance

2013 ◽  
Vol 3 (12) ◽  
pp. 1636-1646 ◽  
Author(s):  
Hao Chen ◽  
Linfeng Hu ◽  
Yan Yan ◽  
Renchao Che ◽  
Min Chen ◽  
...  
Keyword(s):  
Manganese Dioxide ◽  
Nickel Hydroxide ◽  
Porous Nickel ◽  
Capacitive Performance ◽  
One Step

Remarkable improvement in supercapacitor performance by sulfur introduction during a one-step synthesis of nickel hydroxide

2017 ◽  
Vol 19 (16) ◽  
pp. 10462-10469 ◽  
Author(s):  
Liuyang Zhang ◽  
Tang Jiao Huang ◽  
Hao Gong
Keyword(s):  
Nickel Hydroxide ◽  
Remarkable Improvement ◽  
One Step ◽  
Supercapacitor Performance

The effect of sulfur to oxygen ratios on supercapacitor performance has been studied.

scholarly journals One-step electrodeposition of cerium-doped nickel hydroxide nanosheets for effective oxygen generation

RSC Advances ◽  
2019 ◽  
Vol 9 (31) ◽  
pp. 17891-17896 ◽  
Author(s):  
Gang Fang ◽  
Jinhua Cai ◽  
Zhipeng Huang ◽  
Chi Zhang
Keyword(s):  
Oxygen Evolution ◽  
Nickel Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Oxygen Generation ◽  
One Step ◽  
Cerium Doping

Cerium doping is effective approach to promoting performance of nickel hydroxide in oxygen evolution reaction.

Fast fabrication of self-supported porous nickel phosphide foam for efficient, durable oxygen evolution and overall water splitting

2016 ◽  
Vol 4 (15) ◽  
pp. 5639-5646 ◽  
Author(s):  
Xiaoguang Wang ◽  
Wei Li ◽  
Dehua Xiong ◽  
Lifeng Liu
Keyword(s):  
Energy Efficiency ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Nickel Phosphide ◽  
Porous Nickel ◽  
Step Method ◽  
Overall Water Splitting ◽  
Operation Conditions ◽  
One Step

Self-supported porous Ni–P foam is fabricated by a convenient one-step method, and exhibits excellent electrocatalytic performance towards oxygen evolution reaction. An alkaline electrolyzer constructed using two self-supported porous Ni–P foams shows superior energy efficiency of 90.2% at 10 mA cm−2, and can sustain 1000 h under operation conditions without obvious degradation.

One-step preparation of nickel sulfide/nickel hydroxide films for electrocatalytic hydrogen generation from water

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 60674-60680 ◽  
Author(s):  
Yanmei Chen ◽  
Ruixian Wu ◽  
Pingping Jiang ◽  
Gang Bian ◽  
Linggang Kong ◽  
...  
Keyword(s):  
High Activity ◽  
Nickel Hydroxide ◽  
Nickel Sulfide ◽  
Hydrogen Generation ◽  
Post Treatment ◽  
One Step

The Ni-S film prepared by a facile one-step photo-assisted electrodynamic deposition route without any post-treatment exhibits high activity.

Capacitive Behavior of Sodium Ion Pre-Intercalation Manganese Dioxide Supported on Titanium Nitride Substrate

NANO ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. 2050152 ◽  
Author(s):  
Yibing Xie
Keyword(s):  
Titanium Nitride ◽  
Manganese Dioxide ◽  
Density Functional ◽  
Sodium Ion ◽  
High Rate ◽  
Current Response ◽  
Supercapacitor Electrode ◽  
Capacitive Performance ◽  
Calculation Results ◽  
Ion Size

The sodium ion pre-intercalation manganese dioxide (Na[Formula: see text]MnO[Formula: see text] is supported on titanium nitride (TiN) substrate to form electroactive Na[Formula: see text]MnO2/TiN electrode through an electrodeposition process in Mn(CH3COOH)2/Na2SO4 precursors with high Mn/Na ratio. MnO2 has a tiled leaf-like structure with a wrinkling morphology. Na[Formula: see text]MnO2 has a cross-linking nanorod structure with a nanoporous morphology, which is beneficial for electrolyte ion diffusion. The density functional theory (DFT) calculation results indicate that Na[Formula: see text]MnO2 reveals the enhanced density of states (DOS) and the lowered band gap than MnO2, which is consistent with higher cyclic voltammetry current response due to superior electroactivity of Na[Formula: see text]MnO2. The Faradaic process involves Na[Formula: see text] adsorption/desorption on the surface of MnO2 by contributing to electrochemical capacitance and Na[Formula: see text] intercalation/deintercalation on the deep interlayer of pre-intercalation Na[Formula: see text]MnO2 by contributing to pseudocapacitance. Concerning the electrolyte ion size effect, both MnO2/TiN and Na[Formula: see text]MnO2/TiN electrodes have higher capacitive performance in Li2SO4 electrolyte than that in Na2SO4 and K2SO4 electrolyte due to more feasible Li[Formula: see text] diffusion. When MnO2 is converted into Na[Formula: see text]MnO2, the capacitance at 2.5 mA cm[Formula: see text] increases from 351.3 mF cm[Formula: see text] to 405.6 mF cm[Formula: see text] in Na2SO4 electrolyte and from 376.3 mF cm[Formula: see text] to 465.1 mF cm[Formula: see text] in Li2SO4 electrolyte. The conductive TiN substrate leads to high rate capacity retention ratio of 50.7% for MnO2/TiN and 49.5% for Na[Formula: see text]MnO2/TiN when current density increases from 0.5 mA cm[Formula: see text] to 5 mA cm[Formula: see text]. So, Na[Formula: see text]MnO2/TiN with sodium ion pre-intercalation exhibits the improved capacitive performance in Li2SO4 electrolyte to act well as the promising supercapacitor electrode.

Electro-deposition of CoNi2S4 flower-like nanosheets on 3D hierarchically porous nickel skeletons with high electrochemical capacitive performance

2015 ◽  
Vol 3 (45) ◽  
pp. 23035-23041 ◽  
Author(s):  
Tao Wang ◽  
Bo Zhao ◽  
Hong Jiang ◽  
Hai-Peng Yang ◽  
Kai Zhang ◽  
...  
Keyword(s):  
Porous Nickel ◽  
Electro Deposition ◽  
Hierarchically Porous ◽  
Capacitive Performance

Electro-deposited CoNi2S4 nanosheets on 3D hierarchically porous nickel skeletons demonstrate excellent electrochemical capacitive performance.

Sign in / Sign up

Export Citation Format

Share Document