Improved pseudocapacitive performance and cycle life of cobalt hydroxide on an electrochemically derived nano-porous Ni framework

Chih Ming Wu; Chen Yen Fan; I. Wen Sun; Wen Ta Tsai; Jeng-Kuei Chang

doi:10.1016/j.jpowsour.2011.03.083

Improved pseudocapacitive performance and cycle life of cobalt hydroxide on an electrochemically derived nano-porous Ni framework

Chih Ming Wu, Chen Yen Fan, I. Wen Sun, Wen Ta Tsai, Jeng-Kuei Chang^*

^*Corresponding author for this work

Department of Materials Science and Engineering

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

41 Scopus citations

Abstract

The pseudocapacitance and morphology of an electrodeposited cobalt hydroxide (Co(OH)₂) significantly depends on the architecture of the electrode substrate. The nano-porous Ni framework, derived from the selective dissolution of Cu from a Ni-Cu alloy, effectively promotes the electrochemical utilization of deposited Co(OH)₂ even at a high loading amount condition. The great electronic and ionic conduction within the nano-structured electrode improves the energy storage performance of Co(OH)₂ as compared to that for a conventional flat Ni substrate. In this work, the Co(OH)₂ mass specific capacitance, evaluated using cyclic voltammetry (CV), only slightly decreases from 2650 to 2470 F g^-1 when the potential sweep rate is substantially increased from 5 to 200 mV s^-1. The developed Ni(OH)₂/NiOOH (from the nano-porous framework) incorporates with the deposited Co(OH)₂ upon CV cycling; the mixed hydroxide shows a noticeably synergistic capacitance. Furthermore, the dissolution of Co(OH)₂ in KOH electrolyte is greatly suppressed due to the incorporation of Ni(OH)₂/NiOOH, consequently prolonging the electrode cycle life.

Original language	English
Pages (from-to)	7828-7834
Number of pages	7
Journal	Journal of Power Sources
Volume	196
Issue number	18
DOIs	https://doi.org/10.1016/j.jpowsour.2011.03.083
State	Published - 15 Sep 2011

Keywords

Cobalt hydroxide
Cyclic stability
Energy storage
Nano-porous electrode
Supercapacitor

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2011.03.083

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title = "Improved pseudocapacitive performance and cycle life of cobalt hydroxide on an electrochemically derived nano-porous Ni framework",

abstract = "The pseudocapacitance and morphology of an electrodeposited cobalt hydroxide (Co(OH)2) significantly depends on the architecture of the electrode substrate. The nano-porous Ni framework, derived from the selective dissolution of Cu from a Ni-Cu alloy, effectively promotes the electrochemical utilization of deposited Co(OH)2 even at a high loading amount condition. The great electronic and ionic conduction within the nano-structured electrode improves the energy storage performance of Co(OH)2 as compared to that for a conventional flat Ni substrate. In this work, the Co(OH)2 mass specific capacitance, evaluated using cyclic voltammetry (CV), only slightly decreases from 2650 to 2470 F g-1 when the potential sweep rate is substantially increased from 5 to 200 mV s-1. The developed Ni(OH)2/NiOOH (from the nano-porous framework) incorporates with the deposited Co(OH)2 upon CV cycling; the mixed hydroxide shows a noticeably synergistic capacitance. Furthermore, the dissolution of Co(OH)2 in KOH electrolyte is greatly suppressed due to the incorporation of Ni(OH)2/NiOOH, consequently prolonging the electrode cycle life.",

keywords = "Cobalt hydroxide, Cyclic stability, Energy storage, Nano-porous electrode, Supercapacitor",

author = "Wu, {Chih Ming} and Fan, {Chen Yen} and Sun, {I. Wen} and Tsai, {Wen Ta} and Jeng-Kuei Chang",

year = "2011",

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doi = "10.1016/j.jpowsour.2011.03.083",

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T1 - Improved pseudocapacitive performance and cycle life of cobalt hydroxide on an electrochemically derived nano-porous Ni framework

AU - Wu, Chih Ming

AU - Fan, Chen Yen

AU - Sun, I. Wen

AU - Tsai, Wen Ta

AU - Chang, Jeng-Kuei

PY - 2011/9/15

Y1 - 2011/9/15

N2 - The pseudocapacitance and morphology of an electrodeposited cobalt hydroxide (Co(OH)2) significantly depends on the architecture of the electrode substrate. The nano-porous Ni framework, derived from the selective dissolution of Cu from a Ni-Cu alloy, effectively promotes the electrochemical utilization of deposited Co(OH)2 even at a high loading amount condition. The great electronic and ionic conduction within the nano-structured electrode improves the energy storage performance of Co(OH)2 as compared to that for a conventional flat Ni substrate. In this work, the Co(OH)2 mass specific capacitance, evaluated using cyclic voltammetry (CV), only slightly decreases from 2650 to 2470 F g-1 when the potential sweep rate is substantially increased from 5 to 200 mV s-1. The developed Ni(OH)2/NiOOH (from the nano-porous framework) incorporates with the deposited Co(OH)2 upon CV cycling; the mixed hydroxide shows a noticeably synergistic capacitance. Furthermore, the dissolution of Co(OH)2 in KOH electrolyte is greatly suppressed due to the incorporation of Ni(OH)2/NiOOH, consequently prolonging the electrode cycle life.

AB - The pseudocapacitance and morphology of an electrodeposited cobalt hydroxide (Co(OH)2) significantly depends on the architecture of the electrode substrate. The nano-porous Ni framework, derived from the selective dissolution of Cu from a Ni-Cu alloy, effectively promotes the electrochemical utilization of deposited Co(OH)2 even at a high loading amount condition. The great electronic and ionic conduction within the nano-structured electrode improves the energy storage performance of Co(OH)2 as compared to that for a conventional flat Ni substrate. In this work, the Co(OH)2 mass specific capacitance, evaluated using cyclic voltammetry (CV), only slightly decreases from 2650 to 2470 F g-1 when the potential sweep rate is substantially increased from 5 to 200 mV s-1. The developed Ni(OH)2/NiOOH (from the nano-porous framework) incorporates with the deposited Co(OH)2 upon CV cycling; the mixed hydroxide shows a noticeably synergistic capacitance. Furthermore, the dissolution of Co(OH)2 in KOH electrolyte is greatly suppressed due to the incorporation of Ni(OH)2/NiOOH, consequently prolonging the electrode cycle life.

KW - Cobalt hydroxide

KW - Cyclic stability

KW - Energy storage

KW - Nano-porous electrode

KW - Supercapacitor

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JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 18

ER -

Improved pseudocapacitive performance and cycle life of cobalt hydroxide on an electrochemically derived nano-porous Ni framework

Abstract

Keywords

UN SDGs

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