Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries
We present here for the first time the electrochemical behavior of germanium anodes in potassium-ion batteries (KIBs). Nanoporous germanium (np-Ge) samples were fabricated by the chemical-dealloying method using Al as the sacrificial metal. Galvanostatic tests identified the reversible potassiation...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-04-01
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| Series: | Electrochemistry Communications |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248119300529 |
| _version_ | 1828761937380376576 |
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| author | Qing Yang Zhifeng Wang Wei Xi Guang He |
| author_facet | Qing Yang Zhifeng Wang Wei Xi Guang He |
| author_sort | Qing Yang |
| collection | DOAJ |
| description | We present here for the first time the electrochemical behavior of germanium anodes in potassium-ion batteries (KIBs). Nanoporous germanium (np-Ge) samples were fabricated by the chemical-dealloying method using Al as the sacrificial metal. Galvanostatic tests identified the reversible potassiation of the np-Ge anodes and the optimal sample with tuned porosities and ligaments demonstrated stable capacities of ~120 mAh g−1 over 400 cycles. Further analysis of the np-Ge electrode revealed amorphous KGe alloys were formed upon discharge. This study suggest germanium can be a potential anode in KIBs, but the structural tailoring is critical to overcome the kinetics problems of the large K-ions. Keywords: Potassium-ion batteries, Chemical dealloying, Nanoporous materials, Germanium anodes |
| first_indexed | 2024-12-11T01:36:40Z |
| format | Article |
| id | doaj.art-0bafaaec19e04734a518c3a74f983b2c |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-12-11T01:36:40Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-0bafaaec19e04734a518c3a74f983b2c2022-12-22T01:25:10ZengElsevierElectrochemistry Communications1388-24812019-04-011016872Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteriesQing Yang0Zhifeng Wang1Wei Xi2Guang He3Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, PR ChinaTianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, PR China; School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR ChinaTianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, PR ChinaTianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, PR China; Corresponding author.We present here for the first time the electrochemical behavior of germanium anodes in potassium-ion batteries (KIBs). Nanoporous germanium (np-Ge) samples were fabricated by the chemical-dealloying method using Al as the sacrificial metal. Galvanostatic tests identified the reversible potassiation of the np-Ge anodes and the optimal sample with tuned porosities and ligaments demonstrated stable capacities of ~120 mAh g−1 over 400 cycles. Further analysis of the np-Ge electrode revealed amorphous KGe alloys were formed upon discharge. This study suggest germanium can be a potential anode in KIBs, but the structural tailoring is critical to overcome the kinetics problems of the large K-ions. Keywords: Potassium-ion batteries, Chemical dealloying, Nanoporous materials, Germanium anodeshttp://www.sciencedirect.com/science/article/pii/S1388248119300529 |
| spellingShingle | Qing Yang Zhifeng Wang Wei Xi Guang He Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries Electrochemistry Communications |
| title | Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries |
| title_full | Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries |
| title_fullStr | Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries |
| title_full_unstemmed | Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries |
| title_short | Tailoring nanoporous structures of Ge anodes for stable potassium-ion batteries |
| title_sort | tailoring nanoporous structures of ge anodes for stable potassium ion batteries |
| url | http://www.sciencedirect.com/science/article/pii/S1388248119300529 |
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