Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes
This investigation is motivated by interest in nanostructured FeOOH anodes for aqueous asymmetric supercapacitors operating in Na<sub>2</sub>SO<sub>4</sub> electrolyte. The research goal is the fabrication of anodes with high active mass loading of 40 mg cm<sup>−2</s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/10/1693 |
| _version_ | 1827740443887009792 |
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| author | Chengwei Zhang Igor Zhitomirsky |
| author_facet | Chengwei Zhang Igor Zhitomirsky |
| author_sort | Chengwei Zhang |
| collection | DOAJ |
| description | This investigation is motivated by interest in nanostructured FeOOH anodes for aqueous asymmetric supercapacitors operating in Na<sub>2</sub>SO<sub>4</sub> electrolyte. The research goal is the fabrication of anodes with high active mass loading of 40 mg cm<sup>−2</sup>, high capacitance and low resistance. The influence of high-energy ball milling (HEBM), capping agents and alkalizer on the nanostructure and capacitive properties is investigated. HEBM promotes the crystallization of FeOOH, which results in capacitance reduction. Capping agents from the catechol family, such as tetrahydroxy-1,4-benzoquinone (THB) and gallocyanine (GC), facilitate the fabrication of FeOOH nanoparticles, eliminate the formation of micron size particles and allow the fabrication of anodes with enhanced capacitance. The analysis of testing results provided insight into the influence of the chemical structure of the capping agents on nanoparticle synthesis and dispersion. The feasibility of a conceptually new strategy for the synthesis of FeOOH nanoparticles is demonstrated, which is based on the use of polyethylenimine as an organic alkalizer-dispersant. The capacitances of materials prepared using different nanotechnology strategies are compared. The highest capacitance of 6.54 F cm<sup>−2</sup> is obtained using GC as a capping agent. The obtained electrodes are promising for applications as anodes for asymmetric supercapacitors. |
| first_indexed | 2024-03-11T03:26:04Z |
| format | Article |
| id | doaj.art-0aebe6fa01894220ab81c100a33aa85c |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T03:26:04Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-0aebe6fa01894220ab81c100a33aa85c2023-11-18T02:43:22ZengMDPI AGNanomaterials2079-49912023-05-011310169310.3390/nano13101693Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH AnodesChengwei Zhang0Igor Zhitomirsky1Department of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, CanadaDepartment of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, CanadaThis investigation is motivated by interest in nanostructured FeOOH anodes for aqueous asymmetric supercapacitors operating in Na<sub>2</sub>SO<sub>4</sub> electrolyte. The research goal is the fabrication of anodes with high active mass loading of 40 mg cm<sup>−2</sup>, high capacitance and low resistance. The influence of high-energy ball milling (HEBM), capping agents and alkalizer on the nanostructure and capacitive properties is investigated. HEBM promotes the crystallization of FeOOH, which results in capacitance reduction. Capping agents from the catechol family, such as tetrahydroxy-1,4-benzoquinone (THB) and gallocyanine (GC), facilitate the fabrication of FeOOH nanoparticles, eliminate the formation of micron size particles and allow the fabrication of anodes with enhanced capacitance. The analysis of testing results provided insight into the influence of the chemical structure of the capping agents on nanoparticle synthesis and dispersion. The feasibility of a conceptually new strategy for the synthesis of FeOOH nanoparticles is demonstrated, which is based on the use of polyethylenimine as an organic alkalizer-dispersant. The capacitances of materials prepared using different nanotechnology strategies are compared. The highest capacitance of 6.54 F cm<sup>−2</sup> is obtained using GC as a capping agent. The obtained electrodes are promising for applications as anodes for asymmetric supercapacitors.https://www.mdpi.com/2079-4991/13/10/1693supercapacitoranodeiron hydroxidecapping agentalkalizer |
| spellingShingle | Chengwei Zhang Igor Zhitomirsky Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes Nanomaterials supercapacitor anode iron hydroxide capping agent alkalizer |
| title | Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes |
| title_full | Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes |
| title_fullStr | Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes |
| title_full_unstemmed | Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes |
| title_short | Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes |
| title_sort | effect of high energy ball milling capping agents and alkalizer on capacitance of nanostructured feooh anodes |
| topic | supercapacitor anode iron hydroxide capping agent alkalizer |
| url | https://www.mdpi.com/2079-4991/13/10/1693 |
| work_keys_str_mv | AT chengweizhang effectofhighenergyballmillingcappingagentsandalkalizeroncapacitanceofnanostructuredfeoohanodes AT igorzhitomirsky effectofhighenergyballmillingcappingagentsandalkalizeroncapacitanceofnanostructuredfeoohanodes |