Defect-free potassium manganese hexacyanoferrate cathode material for high-performance potassium-ion batteries
Autor: | Jiangwei Wang, Jiale Qu, Lin Guo, Miao Hu, Yujie Zhu, Juan Zhang, Qianfan Zhang, Juzhe Liu, Meiying Feng, Liang Zeng, Youran Hong, Leqing Deng, Xiaogang Niu |
---|---|
Rok vydání: | 2021 |
Předmět: |
Materials science
Science Potassium Inorganic chemistry General Physics and Astronomy chemistry.chemical_element Defect free 02 engineering and technology Manganese 010402 general chemistry 01 natural sciences Article General Biochemistry Genetics and Molecular Biology law.invention Batteries law Specific energy Graphite Energy Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode chemistry Electrode 0210 nano-technology |
Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021) Nature Communications |
ISSN: | 2041-1723 |
Popis: | Potassium-ion batteries (KIBs) are promising electrochemical energy storage systems because of their low cost and high energy density. However, practical exploitation of KIBs is hampered by the lack of high-performance cathode materials. Here we report a potassium manganese hexacyanoferrate (K2Mn[Fe(CN)6]) material, with a negligible content of defects and water, for efficient high-voltage K-ion storage. When tested in combination with a K metal anode, the K2Mn[Fe(CN)6]-based electrode enables a cell specific energy of 609.7 Wh kg−1 and 80% capacity retention after 7800 cycles. Moreover, a K-ion full-cell consisting of graphite and K2Mn[Fe(CN)6] as anode and cathode active materials, respectively, demonstrates a specific energy of 331.5 Wh kg−1, remarkable rate capability, and negligible capacity decay for 300 cycles. The remarkable electrochemical energy storage performances of the K2Mn[Fe(CN)6] material are attributed to its stable frameworks that benefit from the defect-free structure. Potassium-ion battery is a promising candidate for post-Li-ion energy storage but the lack of cathode materials hinders practical exploitation. Here the authors investigate defect-free potassium manganese hexacyanoferrate as cathode active material for high energy and long lifespan K-based cells. |
Databáze: | OpenAIRE |
Externí odkaz: |