Tunable Pseudocapacitive Behavior in Metal-Organic Framework-Derived TiO2@Porous Carbon Enabling High-Performance Membrane Capacitive Deionization

Meng Ding; Shuang Fan; Shaozhuan Huang; Mei Er Pam; Lu Guo; Yumeng Shi; Hui Ying Yang

doi:10.1021/acsaem.8b01839

Tunable Pseudocapacitive Behavior in Metal-Organic Framework-Derived TiO₂@Porous Carbon Enabling High-Performance Membrane Capacitive Deionization

Meng Ding, Shuang Fan, Shaozhuan Huang, Mei Er Pam, Lu Guo, Yumeng Shi, Hui Ying Yang^*

^*Corresponding author for this work

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

58 Citations (Scopus)

Abstract

Titanium dioxide (TiO₂) composites have shown promise in desalination as electrode materials of capacitive deionization (CDI). However, it remains a significant challenge to explore their pseudocapacitive potential for further enhancement of salt adsorption capacity and long-term stability. Herein, we report a titanium dioxide/porous carbon composite (TiO₂@PC) with tunable pseudocapacitance for a high-performance membrane CDI (MCDI) based on a metal-organic frameworks (MOFs)-derived strategy. By controlling the pyrolysis conditions, the crystalline degree and specific surface areas of TiO₂@PC samples have been optimized to improve the salt adsorption performance. A synergy of high pseudocapacitance and good oxidation resistance endows the anatase TiO₂@PC (annealed at 600 °C) with an improved salt adsorption capacity of 46.7 mg g^-1 at 10 mA g^-1 and stable cycling performance over 50 cycles. These properties reveal the great potential of anatase TiO₂@PC to serve as a promising candidate of electrode materials for MCDI.

Original language	English
Pages (from-to)	1812-1822
Number of pages	11
Journal	ACS Applied Energy Materials
Volume	2
Issue number	3
DOIs	https://doi.org/10.1021/acsaem.8b01839
Publication status	Published - 25 Mar 2019
Externally published	Yes

Keywords

membrane capacitive deionization
metal-organic frameworks
nanoporous carbon
pseudocapacitance
titanium dioxide

Access to Document

10.1021/acsaem.8b01839

Cite this

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title = "Tunable Pseudocapacitive Behavior in Metal-Organic Framework-Derived TiO2@Porous Carbon Enabling High-Performance Membrane Capacitive Deionization",

abstract = "Titanium dioxide (TiO2) composites have shown promise in desalination as electrode materials of capacitive deionization (CDI). However, it remains a significant challenge to explore their pseudocapacitive potential for further enhancement of salt adsorption capacity and long-term stability. Herein, we report a titanium dioxide/porous carbon composite (TiO2@PC) with tunable pseudocapacitance for a high-performance membrane CDI (MCDI) based on a metal-organic frameworks (MOFs)-derived strategy. By controlling the pyrolysis conditions, the crystalline degree and specific surface areas of TiO2@PC samples have been optimized to improve the salt adsorption performance. A synergy of high pseudocapacitance and good oxidation resistance endows the anatase TiO2@PC (annealed at 600 °C) with an improved salt adsorption capacity of 46.7 mg g-1 at 10 mA g-1 and stable cycling performance over 50 cycles. These properties reveal the great potential of anatase TiO2@PC to serve as a promising candidate of electrode materials for MCDI.",

keywords = "membrane capacitive deionization, metal-organic frameworks, nanoporous carbon, pseudocapacitance, titanium dioxide",

author = "Meng Ding and Shuang Fan and Shaozhuan Huang and Pam, {Mei Er} and Lu Guo and Yumeng Shi and Yang, {Hui Ying}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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doi = "10.1021/acsaem.8b01839",

language = "English",

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T1 - Tunable Pseudocapacitive Behavior in Metal-Organic Framework-Derived TiO2@Porous Carbon Enabling High-Performance Membrane Capacitive Deionization

AU - Ding, Meng

AU - Fan, Shuang

AU - Huang, Shaozhuan

AU - Pam, Mei Er

AU - Guo, Lu

AU - Shi, Yumeng

AU - Yang, Hui Ying

PY - 2019/3/25

Y1 - 2019/3/25

N2 - Titanium dioxide (TiO2) composites have shown promise in desalination as electrode materials of capacitive deionization (CDI). However, it remains a significant challenge to explore their pseudocapacitive potential for further enhancement of salt adsorption capacity and long-term stability. Herein, we report a titanium dioxide/porous carbon composite (TiO2@PC) with tunable pseudocapacitance for a high-performance membrane CDI (MCDI) based on a metal-organic frameworks (MOFs)-derived strategy. By controlling the pyrolysis conditions, the crystalline degree and specific surface areas of TiO2@PC samples have been optimized to improve the salt adsorption performance. A synergy of high pseudocapacitance and good oxidation resistance endows the anatase TiO2@PC (annealed at 600 °C) with an improved salt adsorption capacity of 46.7 mg g-1 at 10 mA g-1 and stable cycling performance over 50 cycles. These properties reveal the great potential of anatase TiO2@PC to serve as a promising candidate of electrode materials for MCDI.

AB - Titanium dioxide (TiO2) composites have shown promise in desalination as electrode materials of capacitive deionization (CDI). However, it remains a significant challenge to explore their pseudocapacitive potential for further enhancement of salt adsorption capacity and long-term stability. Herein, we report a titanium dioxide/porous carbon composite (TiO2@PC) with tunable pseudocapacitance for a high-performance membrane CDI (MCDI) based on a metal-organic frameworks (MOFs)-derived strategy. By controlling the pyrolysis conditions, the crystalline degree and specific surface areas of TiO2@PC samples have been optimized to improve the salt adsorption performance. A synergy of high pseudocapacitance and good oxidation resistance endows the anatase TiO2@PC (annealed at 600 °C) with an improved salt adsorption capacity of 46.7 mg g-1 at 10 mA g-1 and stable cycling performance over 50 cycles. These properties reveal the great potential of anatase TiO2@PC to serve as a promising candidate of electrode materials for MCDI.

KW - membrane capacitive deionization

KW - metal-organic frameworks

KW - nanoporous carbon

KW - pseudocapacitance

KW - titanium dioxide

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