Effect of transformation pH on performance of nano-scaleβ-Ni(OH)2

Li ZHAO; Shou jun WANG; Jun SHENG; Xi jiang HAN

doi:10.1016/S1003-6326(07)60133-2

Effect of transformation pH on performance of nano-scaleβ-Ni(OH)₂

Li ZHAO^*
, Shou jun WANG
, Jun SHENG
, Xi jiang HAN

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

DLG Battery (Shenzhen) Co. Ltd
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The influence of transformation pH value on the performance of nano-scale Ni(OH)₂ was analyzed. The measurement results of XRD and TEM indicate that the samples are composed of β-Ni(OH)₂ with crystal size of 20-50 nm, and the crystal lattice parameters of nano-scale Ni(OH)₂ prepared at different transformation pH values are different. With the increase of transformation pH value, the agglomeration of nano-scale Ni(OH)₂ becomes obvious. Cyclic voltammograms(CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformation pH value affects the proton diffusion coefficient(D) and charge-transfer resistance(R_ct) of the material. The specific capacity is up to 327.8 mA.h/g, and the discharge performance of electrodes depends on both D and R_ct, so the kinetic characteristics that electrodes reaction is controlled by both mass-transfer step and charge-transfer step was put forward.

Original language	English
Pages (from-to)	558-563
Number of pages	6
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	17
Issue number	3
DOIs	https://doi.org/10.1016/S1003-6326(07)60133-2
State	Published - Jun 2007

Keywords

Ni(OH)
nano material
preparation
transformation pH

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10.1016/S1003-6326(07)60133-2

Cite this

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title = "Effect of transformation pH on performance of nano-scaleβ-Ni(OH)2",

abstract = "The influence of transformation pH value on the performance of nano-scale Ni(OH)2 was analyzed. The measurement results of XRD and TEM indicate that the samples are composed of β-Ni(OH)2 with crystal size of 20-50 nm, and the crystal lattice parameters of nano-scale Ni(OH)2 prepared at different transformation pH values are different. With the increase of transformation pH value, the agglomeration of nano-scale Ni(OH)2 becomes obvious. Cyclic voltammograms(CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformation pH value affects the proton diffusion coefficient(D) and charge-transfer resistance(Rct) of the material. The specific capacity is up to 327.8 mA.h/g, and the discharge performance of electrodes depends on both D and Rct, so the kinetic characteristics that electrodes reaction is controlled by both mass-transfer step and charge-transfer step was put forward.",

keywords = "Ni(OH), nano material, preparation, transformation pH",

author = "Li ZHAO and WANG, \{Shou jun\} and Jun SHENG and HAN, \{Xi jiang\}",

year = "2007",

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doi = "10.1016/S1003-6326(07)60133-2",

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T1 - Effect of transformation pH on performance of nano-scaleβ-Ni(OH)2

AU - ZHAO, Li

AU - WANG, Shou jun

AU - SHENG, Jun

AU - HAN, Xi jiang

PY - 2007/6

Y1 - 2007/6

N2 - The influence of transformation pH value on the performance of nano-scale Ni(OH)2 was analyzed. The measurement results of XRD and TEM indicate that the samples are composed of β-Ni(OH)2 with crystal size of 20-50 nm, and the crystal lattice parameters of nano-scale Ni(OH)2 prepared at different transformation pH values are different. With the increase of transformation pH value, the agglomeration of nano-scale Ni(OH)2 becomes obvious. Cyclic voltammograms(CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformation pH value affects the proton diffusion coefficient(D) and charge-transfer resistance(Rct) of the material. The specific capacity is up to 327.8 mA.h/g, and the discharge performance of electrodes depends on both D and Rct, so the kinetic characteristics that electrodes reaction is controlled by both mass-transfer step and charge-transfer step was put forward.

AB - The influence of transformation pH value on the performance of nano-scale Ni(OH)2 was analyzed. The measurement results of XRD and TEM indicate that the samples are composed of β-Ni(OH)2 with crystal size of 20-50 nm, and the crystal lattice parameters of nano-scale Ni(OH)2 prepared at different transformation pH values are different. With the increase of transformation pH value, the agglomeration of nano-scale Ni(OH)2 becomes obvious. Cyclic voltammograms(CV) and electrochemical impedance spectroscopy(EIS) measurement results show that transformation pH value affects the proton diffusion coefficient(D) and charge-transfer resistance(Rct) of the material. The specific capacity is up to 327.8 mA.h/g, and the discharge performance of electrodes depends on both D and Rct, so the kinetic characteristics that electrodes reaction is controlled by both mass-transfer step and charge-transfer step was put forward.

KW - Ni(OH)

KW - nano material

KW - preparation

KW - transformation pH

UR - https://www.scopus.com/pages/publications/34447270527

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DO - 10.1016/S1003-6326(07)60133-2

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JF - Transactions of Nonferrous Metals Society of China (English Edition)

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ER -

Effect of transformation pH on performance of nano-scaleβ-Ni(OH)₂

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Keywords

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