High-temperature electrochemical performance of Al-α-nickel hydroxides modified by metallic cobalt or Y(OH)3

Wu, Qiong; Liu, S.; Li, L.; Yan, Tianying; Gao, Xueping

doi:10.1016/j.jpowsour.2008.09.112

Cited by 25 publications

(9 citation statements)

References 36 publications

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“…9 Typically, graphene oxide (0.10 g) was added into distilled water (23.15 g) and subjected to ultrasonic vibration to form a homogeneous suspension. The a-Ni(OH) 2 /graphite nanosheet composite was synthesized using a homogeneous precipitation method with urea as a precipitator.…”

Section: Preparation and Characterizationmentioning

confidence: 99%

“…The a-Ni(OH) 2 /graphite nanosheet composite was synthesized using a homogeneous precipitation method with urea as a precipitator. 9 Typically, graphene oxide (0.10 g) was added into distilled water (23.15 g) and subjected to ultrasonic vibration to form a homogeneous suspension. Then, Ni(NO 3 ) 2 $6H 2 O (2.42 g), Al(NO 3 ) 3 $9H 2 O (0.35 g) and urea (2.78 g) were added into the above graphene oxide suspension and stirred for a while.…”

Section: Experimental Preparation and Characterizationmentioning

confidence: 99%

“…Usually, the b(II)-b(III) couple represents the classical electrochemical reaction involved during the electrode charge-discharge processes. 9,10 Based on multi-electron reaction, a-Ni(OH) 2 can deliver larger electrochemical capacity as compared with b-Ni(OH) 2 . 11,12 However, the poor conductivity is the major drawback for nickel hydroxides as semiconductor materials, leading to the poor rate capability of the electrode, as well as the low power output of supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

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A 3D hierarchical porous α-Ni(OH)₂/graphite nanosheet composite as an electrode material for supercapacitors

et al. 2014

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Supercapacitors are the most promising energy storage devices by virtue of high power density, long cycle life, short charging time and environmental benignity. In order to enhance the energy density, rate capability and cycle stability for supercapacitors, a a-Ni(OH) 2 /graphite nanosheet composite is prepared via a homogeneous precipitation method. The morphology and microstructure of the as-prepared composite are characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. It is demonstrated that after introducing the graphene oxide nanosheets into a-Ni(OH) 2 , a 3D hierarchical porous structure of fine a-Ni(OH) 2 nanocrystals as building blocks is formed directly on the matrix of graphite nanosheets in the presence of urea as a mild reducing agent. The electrochemical performance of the as-prepared a-Ni(OH) 2 and a-Ni(OH) 2 /graphite nanosheet composites as electro-active materials for supercapacitors is investigated by a galvanostatic charge-discharge method. As expected, the as-prepared a-Ni(OH) 2 /graphite nanosheet composite exhibits large specific capacitance, good rate capability and long cycle stability as compared to the pure a-Ni(OH) 2 . Apparently, the unique structure of fine a-Ni(OH) 2 nanocrystals fabricated on the matrix of graphite nanosheets is responsible for the improvement of the reaction kinetics and subsequent electrochemical performance of the composite. † Electronic supplementary information (ESI) available: Supercapacitor performance of the a-Ni(OH) 2 -GO mixture and the HRTEM image of the pure a-Ni(OH) 2 . See

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Section: Preparation and Characterizationmentioning

confidence: 99%

Section: Experimental Preparation and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 3D hierarchical porous α-Ni(OH)₂/graphite nanosheet composite as an electrode material for supercapacitors

et al. 2014

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“…The introduction of heteroatoms such as Co, [ 10 ] Al, [ 11,12 ] Zn, [ 5 ] Y, [ 13 ] etc. for partially substituting Ni 2+ in α‐Ni(OH) 2 was regarded as one efficient strategy to enhance the stability of α‐Ni(OH) 2 in alkaline solution.…”

Section: Introductionmentioning

confidence: 99%

3D Co‐Doping α‐Ni(OH)₂ Nanosheets for Ultrastable, High‐Rate Ni‐Zn Battery

Wang

Fan

Chen

et al. 2022

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flexibility, and operation safety are urgently required. [1] Nickel-zinc batteries using non-flammable aqueous electrolyte and low cost zinc anode are regarded as one potential candidate in flexible energy storage fields due to their high output voltage (about 1.7 V) and theoretical energy density (816 Wh kg −1 based on α-Ni(OH) 2 cathode and Zn anode), outstanding intrinsic safety and low production cost. [2] However, their large-scale application was hindered by low practical energy density and poor cycle performance owing to the poor electrical conductivity, retarded ionic diffusion kinetics and severe crystal structural collapse of the Ni-based cathode during cycling. [3,4] Therefore, high performance flexible Ni-Zn batteries requires the simultaneous realization of the ionic transport kinetics, mechanical flexibility and structural robustness of the electrodes even upon the high-rate cycling. [4] Nickel hydroxide has been widely used as the cathode of Ni-Zn batteries due to its high redox potential, high specific capacity, and easy processability. [5] The nickel hydroxide demonstrates a hexagonal layered structure with two forms of crystals, namely the α-Ni(OH) 2 and β-Ni(OH) 2 . [6][7][8] The α-Ni(OH) 2 exhibits a large interlayer distance of ≈0.7 nm due to anions and water molecules intercalation into the interlayer space, which thus guarantees the reversible phase transformation between the α-Ni(OH) 2 and γ-NiOOH during the charge/discharge process without obvious volume variation. [7,9] The oxidation state of nickel in γ-NiOOH is 3.3-3.7, thus the α-Ni(OH) 2 can demonstrate the largest reversible theoretical capacity of 480 mAh g −1 . In the sharp contrast, the β-Ni(OH) 2 can only reversibly convert into the β-NiOOH, and lead to serious structure damage and structural evolution into the γ-NiOOH due to the small interlayer distance of ≈0.46 nm for β-Ni(OH) 2 . [7] The oxidation state of nickel in β-NiOOH is only 2.9, thus the β-Ni(OH) 2 shows a reversible theoretical capacity of 286 mAh g −1 . However, the α-Ni(OH) 2 is unstable and can easily transformed into β-Ni(OH) 2 in the strong alkaline solution, let alone the retarded ionic/electronic conductivity, which limit the power output of the Ni-Zn batteries. [6] The introduction of heteroatoms such as Co, [10] Al, [11,12] Zn, [5] Y, [13] etc. for partially substituting Ni 2+ in α-Ni(OH) 2 was regarded as one efficient strategy to enhance the stability of α-Ni(OH) 2 in alkaline solution. The heteroatoms can stabilize the α-phase through anchoring the anions (CO 3 2− , NO 3 − , The α-Ni(OH) 2 is regarded as one promising cathode for aqueous nickel-zinc batteries due to its high theoretical capacity of ≈480 mAh g −1 , its practical deployment however suffers from the poor stability in strong alkaline solution, intrinsic low electrical conductivity as well as the retarded ionic diffusion. Herein, a 3D (three dimensional) macroporous α-Ni(OH) 2 nanosheets with Co doping is designed through a facile and easily scalable electroless plating combined with elect...

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“…Hidróxidos mistos de níquel e alumínio produzem um aumento de estabilidade em meio básico, um baixo limite de detecção e boa reprodutibilidade [61,62]. Na literatura há descrições de hidróxidos de níquel com ferro [63,64], manganês [65], cobalto [66,67], cadmio [68], zinco [69] que adicionados em quantidades pequenas ao hidróxido de níquel levam a melhoras significativas das propriedades do material.…”

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High-temperature electrochemical performance of Al-α-nickel hydroxides modified by metallic cobalt or Y(OH)3

Cited by 25 publications

References 36 publications

A 3D hierarchical porous α-Ni(OH)₂/graphite nanosheet composite as an electrode material for supercapacitors

A 3D hierarchical porous α-Ni(OH)₂/graphite nanosheet composite as an electrode material for supercapacitors

3D Co‐Doping α‐Ni(OH)₂ Nanosheets for Ultrastable, High‐Rate Ni‐Zn Battery

Desenvolvimento de sensores utilizando hidróxidos metálicos mistos nanoestruturados e sua aplicação em sistemas BIA

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High-temperature electrochemical performance of Al-α-nickel hydroxides modified by metallic cobalt or Y(OH)3

Cited by 25 publications

References 36 publications

A 3D hierarchical porous α-Ni(OH)2/graphite nanosheet composite as an electrode material for supercapacitors

A 3D hierarchical porous α-Ni(OH)2/graphite nanosheet composite as an electrode material for supercapacitors

3D Co‐Doping α‐Ni(OH)2 Nanosheets for Ultrastable, High‐Rate Ni‐Zn Battery

Desenvolvimento de sensores utilizando hidróxidos metálicos mistos nanoestruturados e sua aplicação em sistemas BIA

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A 3D hierarchical porous α-Ni(OH)₂/graphite nanosheet composite as an electrode material for supercapacitors

A 3D hierarchical porous α-Ni(OH)₂/graphite nanosheet composite as an electrode material for supercapacitors

3D Co‐Doping α‐Ni(OH)₂ Nanosheets for Ultrastable, High‐Rate Ni‐Zn Battery