Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries
Abstract Prussian blue analogues (PBAs) are promising electrode candidates for aqueous batteries because the inevitable interstitial water is generally thought to have little impact on battery performance. Currently, mounting researches have focused on optimizing PBA properties by varying transition...
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Nature Portfolio
2025-05-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59980-z |
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| author | Qiubo Guo Shuai Han Yaxiang Lu Ruijuan Xiao Jin Li Qingli Hao Xiaohui Rong Suting Weng Yaoshen Niu Feixiang Ding Yang Yang Hui Xia Xuefeng Wang Fei Xie Lin Zhou Xueyan Hou Hong Li Xuejie Huang Liquan Chen Yong-Sheng Hu |
| author_facet | Qiubo Guo Shuai Han Yaxiang Lu Ruijuan Xiao Jin Li Qingli Hao Xiaohui Rong Suting Weng Yaoshen Niu Feixiang Ding Yang Yang Hui Xia Xuefeng Wang Fei Xie Lin Zhou Xueyan Hou Hong Li Xuejie Huang Liquan Chen Yong-Sheng Hu |
| author_sort | Qiubo Guo |
| collection | DOAJ |
| description | Abstract Prussian blue analogues (PBAs) are promising electrode candidates for aqueous batteries because the inevitable interstitial water is generally thought to have little impact on battery performance. Currently, mounting researches have focused on optimizing PBA properties by varying transition metal composition, but less attention has been paid to interstitial water, especially in alkali metal-ion deficient PBAs with large cavities. Here, we employ the water-rich K0.01Mn[Cr(CN)6]0.74·4.75H2O as the negative electrode to study the effect of interstitial water. It is found that during de-potassiation, the electrode undergoes dehydration, which negatively impacts kinetics, distorts structure, and raises charging potential. A cation-self-shielding strategy involving Dihydroxyacetone (DHA) in the electrolyte to secure the water-rich state is then proposed. The built 1.82 V all-Prussian blue aqueous K-ion battery delivers a high practical specific energy of ~76 Wh kg−1 over 1.5 V (based on the total mass of active materials in both electrodes). This study reveals the significance of interstitial water on the kinetics of PBA negative electrodes and promotes the exploration of water-containing electrodes to develop high-voltage aqueous rechargeable batteries for energy storage applications. |
| format | Article |
| id | doaj-art-e9c6490a2eb047408d81c5ce383e1b14 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-e9c6490a2eb047408d81c5ce383e1b142025-08-20T03:48:19ZengNature PortfolioNature Communications2041-17232025-05-0116111310.1038/s41467-025-59980-zCation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteriesQiubo Guo0Shuai Han1Yaxiang Lu2Ruijuan Xiao3Jin Li4Qingli Hao5Xiaohui Rong6Suting Weng7Yaoshen Niu8Feixiang Ding9Yang Yang10Hui Xia11Xuefeng Wang12Fei Xie13Lin Zhou14Xueyan Hou15Hong Li16Xuejie Huang17Liquan Chen18Yong-Sheng Hu19Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesHerbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and TechnologyKey Laboratory for Soft Chemistry and Functional Materials, Ministry of Education, School of Chemical Engineering, Nanjing University of Science and TechnologyKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesHerbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and TechnologyKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesKey Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesAbstract Prussian blue analogues (PBAs) are promising electrode candidates for aqueous batteries because the inevitable interstitial water is generally thought to have little impact on battery performance. Currently, mounting researches have focused on optimizing PBA properties by varying transition metal composition, but less attention has been paid to interstitial water, especially in alkali metal-ion deficient PBAs with large cavities. Here, we employ the water-rich K0.01Mn[Cr(CN)6]0.74·4.75H2O as the negative electrode to study the effect of interstitial water. It is found that during de-potassiation, the electrode undergoes dehydration, which negatively impacts kinetics, distorts structure, and raises charging potential. A cation-self-shielding strategy involving Dihydroxyacetone (DHA) in the electrolyte to secure the water-rich state is then proposed. The built 1.82 V all-Prussian blue aqueous K-ion battery delivers a high practical specific energy of ~76 Wh kg−1 over 1.5 V (based on the total mass of active materials in both electrodes). This study reveals the significance of interstitial water on the kinetics of PBA negative electrodes and promotes the exploration of water-containing electrodes to develop high-voltage aqueous rechargeable batteries for energy storage applications.https://doi.org/10.1038/s41467-025-59980-z |
| spellingShingle | Qiubo Guo Shuai Han Yaxiang Lu Ruijuan Xiao Jin Li Qingli Hao Xiaohui Rong Suting Weng Yaoshen Niu Feixiang Ding Yang Yang Hui Xia Xuefeng Wang Fei Xie Lin Zhou Xueyan Hou Hong Li Xuejie Huang Liquan Chen Yong-Sheng Hu Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries Nature Communications |
| title | Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries |
| title_full | Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries |
| title_fullStr | Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries |
| title_full_unstemmed | Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries |
| title_short | Cation-self-shielding strategy promises high-voltage all-Prussian-blue-based aqueous K-ion batteries |
| title_sort | cation self shielding strategy promises high voltage all prussian blue based aqueous k ion batteries |
| url | https://doi.org/10.1038/s41467-025-59980-z |
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