Solvothermal synthesis of Y-doped α-nickel hydroxide flower-like nanostructure for aqueous asymmetric supercapacitors

Zhu, Yuanyi; An, Shengli; Sun, Xuejiao; Cui, Jinlong; Zhang, Yongqiang; He, Wenxiu

doi:10.1016/j.inoche.2019.107603

Cited by 9 publications

(10 citation statements)

References 35 publications

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“…There are two apparent weight loss areas in the thermal gravimetric (TG) analysis plot of the Ni(OH) 2 as clearly detected in DSC curve. Below 150 °C, the 11.5% weight loss is caused by the abstraction of adsorbed water and intercalated water molecules, respectively [15,16]. In the temperature range of 150-400 °C, however, the sample continues to lose its weight slowly; as the temperature is increased to 220 °C the total weight loss reaches about 22%.…”

Section: Structural and Morphological Characterizationsmentioning

confidence: 99%

“…To enhance the cycling stability between α-Ni(OH) 2 and γ-NiOOH, many works have been performed on the partial substitution of metal ions for nickel in the lattice of Ni(OH) 2 ; e.g. Al-, Co-, Mn-, Zn-, Y-and Cu-substituted α-Ni(OH) 2 [15][16][17]. Furthermore, some studies have been performed on the coprecipitation of mixed α/β-Ni(OH) 2 [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

Mao

Zhou

Peng

2020

J Mater Sci: Mater Electron

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Here, uniform thin nanosheets' film of mixed α-and β-Ni(OH) 2 phases was cathodically electrodeposited onto nickel foam support and the fabricated electrode was utilized as binder-free electrode for supercapacitor applications. An additive-free aqueous electrolyte of 0.05 M nickel nitrate was used as the deposition bath, where the hydroxide film was prepared with only applying direct current of 10 mA/cm 2 in a two-electrode system while a uniform electrical field was established through using two counter electrodes parallel to nickel foam cathode. The morphology, crystalline phase and also specific surface area of the deposited nickel hydroxide film onto Ni foam were analyzed using field-emission scanning electron (FE-SEM) and X-ray diffraction (XRD) techniques as well as BET and FT-IR spectroscopy. These analyses proved that a mixed alpha and beta phases of Ni(OH) 2 with uniform nanosheets' morphology are grown onto the nickel foam cathode. The electrochemical investigations using CV, GCD and electrochemical impedance spectroscopy (EIS) manifested the designed electrode provides specific capacitance of 2143 F g −1 at a current density of 0.5 A g −1 with high rate capability of 65% by increasing the current density from 0.5 to 20 A g −1 as well as 90% and 74% cycling stability at the current densities of 5 and 15 A/g, respectively. The excellent electrochemical performance of the as-prepared electrode is ascribed to the simultaneous deposition of both α and β phases through using a facile electrochemical deposition method. The presence of α and β phases guarantees the high specific capacitance and high cycling stability of the prepared electrode, respectively.

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Section: Structural and Morphological Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

Mao

Zhou

Peng

2020

J Mater Sci: Mater Electron

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“…TMHs are becoming more and more sought after because of their high theoretical specific capacitance, stable structure, ample active sites, and compatibility with electrolytes [147,184] . Up to now, parallel to TMOs, RE ion doping or the introduction of REOs can also improve the capacitive properties of TMHs such as Y‐doped Ni(OH) 2 [185–187] . Especially, He and co‐workers improved the specific capacity of Ni(OH) 2 nanocrystals via Y 3+ ions doping.…”

Section: Re Compounds and Nanocomposites For Scs Applicationmentioning

confidence: 99%

“…[147,184] Up to now, parallel to TMOs, RE ion doping or the introduction of REOs can also improve the capacitive properties of TMHs such as Y-doped Ni(OH) 2 . [185][186][187] Especially, He and co-workers improved the specific capacity of Ni(OH) 2 nanocrystals via Y 3 + ions doping. The Y-doped Ni(OH) 2 obtained by hydrothermal method reached specific capacitance of 735.46 C g À 1 , which is superior to that of pristine samples (279.7 C g À 1 ).…”

Section: Re/tmh Compositesmentioning

confidence: 99%

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

Zhou

2022

ChemSusChem

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Supercapacitors (SCs) can effectively alleviate problems such as energy shortage and serious greenhouse effect. The properties of electrode materials directly affect the performance of SCs. Rare earth (RE) is known as “modern industrial vitamins”, and their functional materials have been listed as key strategic materials. In the past few years, the number of scientific reports on RE‐based nanomaterials for SCs has increased rapidly, confirming that adding RE elements or compounds to the host electrode materials with various nanostructured morphologies can greatly enhance their electrochemical performance. Although RE‐based nanomaterials have made rapid progress in SCs, there are very few works providing a comprehensive survey of this field. In view of this, a comprehensive overview of RE‐based nanomaterials for SCs is provided here, including the preparation methods, nanostructure engineering, compounds, and composites, along with their capacitance performances. The structure–activity relationships are discussed and highlighted. Meanwhile, the future challenges and perspectives are also pointed out. This Review can not only provide guidance for the further development of SCs but also arouse great interest in RE‐based nanomaterials in other research fields such as electrocatalysis, photovoltaic cells, and lithium batteries.

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“…The alkaline Ni-MH battery is widely used due to its high specific energy, environmental protection characteristic, and high reliability. A nickel hydroxide cathode has an excellent electrochemical performance and is an attractive typical battery electrode. − Commonly, nickel hydroxide has two crystal phases known as β-Ni(OH) 2 and α-Ni(OH) 2 , which are transformed into β-NiOOH and γ-NiOOH during the oxidation process, respectively. − β-Ni(OH) 2 is widely used for commercial Ni-MH batteries because it has great characteristics of high tap density and excellent stability in strong alkali electrolytes. However, the theoretical discharge capacity of β-Ni(OH) 2 is only 289 mAh g –1 , which is a limiting factor that needs to be resolved urgently in current commercial batteries.…”

Section: Introductionmentioning

confidence: 99%

Structure and Electrochemical Performance of Al and Y Co-Doped α-Nickel Hydroxide as a Cathode for a Ni-MH Battery

et al. 2021

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The Al and Y elements co-doped α-Ni(OH)2 materials were prepared by a chemical complexing precipitation method. The physical properties and structures of these materials were characterized, and their electrochemical performance as a cathode for Ni-MH batteries was measured. The results show that Al and Y elements partially replaced Ni atoms in the layers and attracted more anions between interlayers, thereby neutralizing the positive charge and stabilizing the structure. Therefore, the Al and Y elements co-doped α-Ni(OH)2 cathode displays excellent reaction reversibility, low electrochemical resistance, and fast diffusion rate. Besides, the cycling stability indicates that the discharge capacity and the activation rate are improved by adding Y element. The sample containing 2 atom % Y has the highest capacity of 388 mAh g–1 at 1 C rate, and it has great rate performance and great cycle stability. This is a promising material as a cathode applied in Ni-MH batteries.

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Solvothermal synthesis of Y-doped α-nickel hydroxide flower-like nanostructure for aqueous asymmetric supercapacitors

Cited by 9 publications

References 35 publications

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

Structure and Electrochemical Performance of Al and Y Co-Doped α-Nickel Hydroxide as a Cathode for a Ni-MH Battery

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