The nanoscale effects on the morphology, microstructure and electrochemical performances of the cathodic deposited alpha-Ni(OH)(2)

Wu, Yu1; Sang, Shangbin1; Zhong, Wenjie1; Li, Fang1; Liu, Kaiyu1; Liu, Hongtao1; Lu, Zhouguang2; Wu, Qiumei3

2018-01-20

10.1016/j.electacta.2017.10.091

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

In this study, alpha-Ni(OH)(2) with controllable pristine crystal size is directly electrodeposited on a substrate of Ti wire mesh to fabricate the integrated electrode. The nanoscale effects on morphology, microstructure and electrochemical performance of the cathodic deposited alpha-Ni(OH)(2) are studied. The results show that the morphology of alpha-Ni(OH)(2) varies from irregular honeycomb-like nanopieces, ball-shaped particles to oval nanoplates as the cathodic deposition current density increases. The nanostructure diversity of the cathodic deposited alpha-Ni(OH)(2) is due to the different nanosize which directly depends on the cathodic deposition current density. The electrochemical performances of the cathodic deposited alpha-Ni(OH)(2) increase with the decrease of the pristine crystal size of alpha-Ni(OH)(2). The oval alpha-Ni(OH)(2) nanoplates consisting of nanosheets with a pristine crystal size of 3 similar to 5 nm x 5 similar to 7 nm show the ultrahigh specific capacities of similar to 348 mAh g(-1) and similar to 312.5 mAh g(-1) at charge/discharge current density of 5 A g(-1) and 100 A g(-1), respectively, and over 70% specific capacity still remains after 1000 cycles, while the irregular honeycomb-like alpha-Ni(OH)(2) consisting of nanosheet with a pristine crystal size of 10 similar to 15 nm x 15 similar to 20 nm shows only similar to 260 mAh g(-1) specific capacity at 5 A g(-1) and similar to 150 mAh g(-1) at 100 A g(-1). The ultrahigh electrochemical performances are attributed to the nanoscale and the defective nanostructure of the cathodic deposited alpha-Ni(OH)(2). (c) 2017 Published by Elsevier Ltd.

alpha-Ni(OH)(2) pristine crystal size Cathodic electrodeposition Nanoscale effect Ultrahigh electrochemical performances

SCI ; EI

英语

其他

National Natural Science Foundation of China[21406273]

Electrochemistry

Electrochemistry

WOS:000424635600008

PERGAMON-ELSEVIER SCIENCE LTD

20175204575273

Current density ; Electrodeposition ; Electrodes ; Grain size and shape ; Honeycomb structures ; Microstructure ; Nanosheets

Structural Members and Shapes:408.2 ; Electroplating:539.3.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Solid State Physics:933 ; Materials Science:951

CHEMISTRY

Web of Science

1.Cent S Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Chem Power Sources, Changsha 410083, Hunan, Peoples R China
2.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Cent S Univ, Key State Lab Powder Met Inst, Changsha 410083, Hunan, Peoples R China

Wu, Yu,Sang, Shangbin,Zhong, Wenjie,et al. The nanoscale effects on the morphology, microstructure and electrochemical performances of the cathodic deposited alpha-Ni(OH)(2)[J]. ELECTROCHIMICA ACTA,2018,261:58-65.

Wu, Yu.,Sang, Shangbin.,Zhong, Wenjie.,Li, Fang.,Liu, Kaiyu.,...&Wu, Qiumei.(2018).The nanoscale effects on the morphology, microstructure and electrochemical performances of the cathodic deposited alpha-Ni(OH)(2).ELECTROCHIMICA ACTA,261,58-65.

Wu, Yu,et al."The nanoscale effects on the morphology, microstructure and electrochemical performances of the cathodic deposited alpha-Ni(OH)(2)".ELECTROCHIMICA ACTA 261(2018):58-65.