High energy density pseudocapacitor based on a nanoporous tungsten(VI) oxide iodide/poly(2-amino-1-mercaptobenzene) composite
The synthesis of the tungsten(VI) oxide iodide/poly-2-amino-1-mercaptobenzene nanoporous composite (W(VI)OI/P2AMB-NP composite) follows a two-step process. Initially, 2-amino-1-mercaptobenzene undergoes oxidative polymerization using iodine as the oxidant, followed by a double replacement reaction w...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2025-07-01
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| Series: | Green Processing and Synthesis |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/gps-2025-0032 |
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| Summary: | The synthesis of the tungsten(VI) oxide iodide/poly-2-amino-1-mercaptobenzene nanoporous composite (W(VI)OI/P2AMB-NP composite) follows a two-step process. Initially, 2-amino-1-mercaptobenzene undergoes oxidative polymerization using iodine as the oxidant, followed by a double replacement reaction with Na2WO6. This process leads to the formation of a unique composite structure, where nanoparticles ranging from 15 to 20 nm aggregate into larger secondary particles exceeding 500 nm and further assemble into micrometer-scale clusters (>1 µm). X-ray diffraction analysis confirms the high crystallinity and semiconducting nature of the composite, revealing a remarkably small crystalline size of ∼59 nm. This well-defined nanostructure contributes significantly to its charge storage performance. Electrochemical characterization was carried out using a three-electrode system, where the W(VI)OI/P2AMB-NP composite exhibited a high specific capacitance (C
s) of 200 F·g−1 at a current density of 1.0 A·g−1. Additionally, the material demonstrated an impressive energy density of 49.9 Wh·kg−1, indicating its strong potential as an advanced pseudocapacitor electrode. Beyond its electrochemical efficiency, this composite is cost-effectiveness and amenable to scalable synthesis, supporting its suitability for commercial applications. Long-term cycling stability tests revealed excellent durability, with 99.1% capacitance retention after 1,000 charge–discharge cycles. These attributes position the W(VI)OI/P2AMB-NP composite as a highly promising candidate for next-generation energy storage systems, offering a compelling combination of performance, stability, and economic viability. |
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| ISSN: | 2191-9550 |