High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium
Abstract An isotropic thermo‐electrochemical cell is introduced with a high Seebeck coefficient (Se) of 3.3 mV K−1 that uses a ferricyanide/ferrocyanide/guanidinium‐based agar‐gelated electrolyte. A power density of about 20 µW cm−2 is achieved at a temperature difference of about 10 K, regardless o...
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| Format: | Article |
| Language: | English |
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Wiley
2023-06-01
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| Series: | Global Challenges |
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| Online Access: | https://doi.org/10.1002/gch2.202200207 |
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| author | Lixian Jiang Shohei Horike Masakazu Mukaida Kazuhiro Kirihara Kazuhiko Seki Qingshuo Wei |
| author_facet | Lixian Jiang Shohei Horike Masakazu Mukaida Kazuhiro Kirihara Kazuhiko Seki Qingshuo Wei |
| author_sort | Lixian Jiang |
| collection | DOAJ |
| description | Abstract An isotropic thermo‐electrochemical cell is introduced with a high Seebeck coefficient (Se) of 3.3 mV K−1 that uses a ferricyanide/ferrocyanide/guanidinium‐based agar‐gelated electrolyte. A power density of about 20 µW cm−2 is achieved at a temperature difference of about 10 K, regardless of whether the heat source is on the top or bottom section of the cell. This behavior is very different from that of cells with liquid electrolytes, which exhibit high anisotropy, and for which high Se values are achieved only by heating the bottom electrode. The guanidinium‐containing gelatinized cell does not exhibit steady‐state operation, but its performance recovers when disconnected from the external load, suggesting that the observed power drop under load conditions is not due to device degeneration. The large Se value and isotropic properties can mean that the novel system represents a major advancement from the standpoint of harvesting of low‐temperature heat, such as body heat and solar thermal heat. |
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| id | doaj.art-0c125ddf68d14500b3447c1ce2da7720 |
| institution | Directory Open Access Journal |
| issn | 2056-6646 |
| language | English |
| last_indexed | 2024-03-13T07:06:08Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
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| series | Global Challenges |
| spelling | doaj.art-0c125ddf68d14500b3447c1ce2da77202023-06-06T08:52:49ZengWileyGlobal Challenges2056-66462023-06-0176n/an/a10.1002/gch2.202200207High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/GuanidiniumLixian Jiang0Shohei Horike1Masakazu Mukaida2Kazuhiro Kirihara3Kazuhiko Seki4Qingshuo Wei5Nanomaterials Research Institute Department of Materials and Chemistry National Institute of Advanced Industrial Science and Technology (AIST) 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 JapanDepartment of Chemical Science and Engineering Graduate School of Engineering Kobe University 1‐1 Rokkodai‐cho Kobe 657‐8501 JapanNanomaterials Research Institute Department of Materials and Chemistry National Institute of Advanced Industrial Science and Technology (AIST) 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 JapanNanomaterials Research Institute Department of Materials and Chemistry National Institute of Advanced Industrial Science and Technology (AIST) 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 JapanGZR National Institute of Advanced Industrial Science and Technology (AIST) 16‐1 Onogawa Tsukuba Ibaraki 305‐8569 JapanNanomaterials Research Institute Department of Materials and Chemistry National Institute of Advanced Industrial Science and Technology (AIST) 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 JapanAbstract An isotropic thermo‐electrochemical cell is introduced with a high Seebeck coefficient (Se) of 3.3 mV K−1 that uses a ferricyanide/ferrocyanide/guanidinium‐based agar‐gelated electrolyte. A power density of about 20 µW cm−2 is achieved at a temperature difference of about 10 K, regardless of whether the heat source is on the top or bottom section of the cell. This behavior is very different from that of cells with liquid electrolytes, which exhibit high anisotropy, and for which high Se values are achieved only by heating the bottom electrode. The guanidinium‐containing gelatinized cell does not exhibit steady‐state operation, but its performance recovers when disconnected from the external load, suggesting that the observed power drop under load conditions is not due to device degeneration. The large Se value and isotropic properties can mean that the novel system represents a major advancement from the standpoint of harvesting of low‐temperature heat, such as body heat and solar thermal heat.https://doi.org/10.1002/gch2.202200207agargelled electrolytesguanidiniumisotropicthermo‐electrochemical cells |
| spellingShingle | Lixian Jiang Shohei Horike Masakazu Mukaida Kazuhiro Kirihara Kazuhiko Seki Qingshuo Wei High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium Global Challenges agar gelled electrolytes guanidinium isotropic thermo‐electrochemical cells |
| title | High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium |
| title_full | High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium |
| title_fullStr | High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium |
| title_full_unstemmed | High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium |
| title_short | High‐Performance Isotropic Thermo‐Electrochemical Cells Using Agar‐Gelled Ferricyanide/Ferrocyanide/Guanidinium |
| title_sort | high performance isotropic thermo electrochemical cells using agar gelled ferricyanide ferrocyanide guanidinium |
| topic | agar gelled electrolytes guanidinium isotropic thermo‐electrochemical cells |
| url | https://doi.org/10.1002/gch2.202200207 |
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