Interlayer-Expanded Molybdenum Disulfide Nanocomposites for Electrochemical Magnesium Storage
| العنوان: | Interlayer-Expanded Molybdenum Disulfide Nanocomposites for Electrochemical Magnesium Storage |
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| المؤلفون: | Lars C. Grabow, Hyun Deog Yoo, Francisco C. Robles Hernandez, Yanliang Liang, Hector A. Calderon, Jing Shuai, Yan Yao, Yifei Li |
| المصدر: | Nano Letters. 15:2194-2202 |
| بيانات النشر: | American Chemical Society (ACS), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Nanocomposite, Materials science, Mechanical Engineering, Intercalation (chemistry), Inorganic chemistry, Bioengineering, General Chemistry, Electrolyte, Condensed Matter Physics, Electrochemistry, Cathode, Energy storage, Anode, law.invention, chemistry.chemical_compound, chemistry, Chemical engineering, law, General Materials Science, Molybdenum disulfide |
| الوصف: | Mg rechargeable batteries (MgRBs) represent a safe and high-energy battery technology but suffer from the lack of suitable cathode materials due to the slow solid-state diffusion of the highly polarizing divalent Mg ion. Previous methods improve performance at the cost of incompatibility with anode/electrolyte and drastic decrease in volumetric energy density. Herein we report interlayer expansion as a general and effective atomic-level lattice engineering approach to transform inactive intercalation hosts into efficient Mg storage materials without introducing adverse side effects. As a proof-of-concept we have combined theory, synthesis, electrochemical measurement, and kinetic analysis to improve Mg diffusion behavior in MoS2, which is a poor Mg transporting material in its pristine form. First-principles simulations suggest that expanded interlayer spacing allows for fast Mg diffusion because of weakened Mg-host interactions. Experimentally, the expansion was realized by inserting a controlled amount of poly(ethylene oxide) into the lattice of MoS2 to increase the interlayer distance from 0.62 nm to up to 1.45 nm. The expansion boosts Mg diffusivity by 2 orders of magnitude, effectively enabling the otherwise barely active MoS2 to approach its theoretical storage capacity as well as to achieve one of the highest rate capabilities among Mg-intercalation materials. The interlayer expansion approach can be leveraged to a wide range of host materials for the storage of various ions, leading to novel intercalation chemistry and opening up new opportunities for the development of advanced materials for next-generation energy storage. |
| تدمد: | 1530-6992 1530-6984 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e80e8dbad9f226b51a675e3cbff2905d https://doi.org/10.1021/acs.nanolett.5b00388 |
| رقم الأكسشن: | edsair.doi.dedup.....e80e8dbad9f226b51a675e3cbff2905d |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15306992 15306984 |
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