Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes
Abstract In this study, Li4Ti5O12 (LTO) and TiO2 nanocomposites uniformly were synthesized on the heat‐treated graphite felt through (HGF) hydrothermal and heat treatment methods, denoted by LTO/TiO2@HGF, which LTO/TiO2@HGF acts as effective electrocatalysts to enhance the electrochemical activity i...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2025-01-01
|
| Series: | ChemElectroChem |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/celc.202400477 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841527148630769664 |
|---|---|
| author | Zih‐Jhong Huang Daniel Manaye Kabtamu Aknachew Mebreku Demeku Guan‐Cheng Chen Ning‐Yih Hsu Hung‐Hsien Ku Yao‐Ming Wang Tai‐Chin Chiang Chen‐Hao Wang |
| author_facet | Zih‐Jhong Huang Daniel Manaye Kabtamu Aknachew Mebreku Demeku Guan‐Cheng Chen Ning‐Yih Hsu Hung‐Hsien Ku Yao‐Ming Wang Tai‐Chin Chiang Chen‐Hao Wang |
| author_sort | Zih‐Jhong Huang |
| collection | DOAJ |
| description | Abstract In this study, Li4Ti5O12 (LTO) and TiO2 nanocomposites uniformly were synthesized on the heat‐treated graphite felt through (HGF) hydrothermal and heat treatment methods, denoted by LTO/TiO2@HGF, which LTO/TiO2@HGF acts as effective electrocatalysts to enhance the electrochemical activity in vanadium redox flow battery (VRFB) systems. The cyclic voltammetry (CV) curves of the LTO/TiO2@HGF show higher peak current densities and smaller peak separation than TiO2@HGF, HGF, and pristine graphite felt (PGF) for catalyzing V2+/V3+ and VO₂+/VO2+, indicating superior electrochemical activity of LTO/TiO2@HGF. The VRFB using LTO/TiO2@HGF as the positive and negative electrodes demonstrates an energy efficiency of 82.89 % at 80 mA cm−2. When the VRFB using LTO/TiO2@HGF is applied by a high current density of 200 mA cm−2, it still shows an energy efficiency of 62.22 %. However, the VRFB using PGF cannot perform any performance, and the VRFB using HGF only performs 51.94 %. This improvement can be attributed to the uniform distribution of LTO/TiO2 nanowires on the surface of the graphite felt and the presence of oxygen vacancies on LTO/TiO2, which increased the number of active sites for vanadium ion absorption. |
| format | Article |
| id | doaj-art-11782fa655844b07888473bcbff307d8 |
| institution | Kabale University |
| issn | 2196-0216 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj-art-11782fa655844b07888473bcbff307d82025-01-16T04:43:36ZengWiley-VCHChemElectroChem2196-02162025-01-01122n/an/a10.1002/celc.202400477Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt ElectrodesZih‐Jhong Huang0Daniel Manaye Kabtamu1Aknachew Mebreku Demeku2Guan‐Cheng Chen3Ning‐Yih Hsu4Hung‐Hsien Ku5Yao‐Ming Wang6Tai‐Chin Chiang7Chen‐Hao Wang8Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 106335 TaiwanDepartment of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 106335 TaiwanDepartment of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 106335 TaiwanDepartment of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 106335 TaiwanChemistry Division National Atomic Research Institute Taoyuan 325207 TaiwanChemistry Division National Atomic Research Institute Taoyuan 325207 TaiwanMaritime Innovation & Industry Promotion Department Metal Industries Research & Development Centre Kaohsiung 811160 TaiwanSecond Research Division Chung-Hua Institution for Economic Research Taipei 10672 TaiwanDepartment of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 106335 TaiwanAbstract In this study, Li4Ti5O12 (LTO) and TiO2 nanocomposites uniformly were synthesized on the heat‐treated graphite felt through (HGF) hydrothermal and heat treatment methods, denoted by LTO/TiO2@HGF, which LTO/TiO2@HGF acts as effective electrocatalysts to enhance the electrochemical activity in vanadium redox flow battery (VRFB) systems. The cyclic voltammetry (CV) curves of the LTO/TiO2@HGF show higher peak current densities and smaller peak separation than TiO2@HGF, HGF, and pristine graphite felt (PGF) for catalyzing V2+/V3+ and VO₂+/VO2+, indicating superior electrochemical activity of LTO/TiO2@HGF. The VRFB using LTO/TiO2@HGF as the positive and negative electrodes demonstrates an energy efficiency of 82.89 % at 80 mA cm−2. When the VRFB using LTO/TiO2@HGF is applied by a high current density of 200 mA cm−2, it still shows an energy efficiency of 62.22 %. However, the VRFB using PGF cannot perform any performance, and the VRFB using HGF only performs 51.94 %. This improvement can be attributed to the uniform distribution of LTO/TiO2 nanowires on the surface of the graphite felt and the presence of oxygen vacancies on LTO/TiO2, which increased the number of active sites for vanadium ion absorption.https://doi.org/10.1002/celc.202400477Energy storage systemVanadium redox flow batteryGraphite feltHeat treatmentElectrochemical activityEnergy efficiency |
| spellingShingle | Zih‐Jhong Huang Daniel Manaye Kabtamu Aknachew Mebreku Demeku Guan‐Cheng Chen Ning‐Yih Hsu Hung‐Hsien Ku Yao‐Ming Wang Tai‐Chin Chiang Chen‐Hao Wang Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes ChemElectroChem Energy storage system Vanadium redox flow battery Graphite felt Heat treatment Electrochemical activity Energy efficiency |
| title | Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes |
| title_full | Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes |
| title_fullStr | Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes |
| title_full_unstemmed | Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes |
| title_short | Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes |
| title_sort | enhanced electrochemical performance of vanadium redox flow batteries using li4ti5o12 tio2 nanocomposite modified graphite felt electrodes |
| topic | Energy storage system Vanadium redox flow battery Graphite felt Heat treatment Electrochemical activity Energy efficiency |
| url | https://doi.org/10.1002/celc.202400477 |
| work_keys_str_mv | AT zihjhonghuang enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT danielmanayekabtamu enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT aknachewmebrekudemeku enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT guanchengchen enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT ningyihhsu enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT hunghsienku enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT yaomingwang enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT taichinchiang enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes AT chenhaowang enhancedelectrochemicalperformanceofvanadiumredoxflowbatteriesusingli4ti5o12tio2nanocompositemodifiedgraphitefeltelectrodes |