التفاصيل البيبلوغرافية
| العنوان: |
Operando X‑ray Diffraction Studies of the Mg-Ion Migration Mechanisms in Spinel Cathodes for Rechargeable Mg-Ion Batteries |
| المؤلفون: |
Liang Yin (458027), Bob Jin Kwon (4899232), Yunyeong Choi (11098756), Christopher J. Bartel (2868668), Mengxi Yang (3852307), Chen Liao (1288563), Baris Key (1390190), Gerbrand Ceder (380361), Saul H. Lapidus (1453873) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Microbiology, Cell Biology, Molecular Biology, Physiology, Biotechnology, Ecology, Developmental Biology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, cation migrations, spinel framework, Rechargeable Mg-Ion Batteries, ion insertion systems, host structure, theory calculations, cation contents, operando techniques, cation redistributions, spinel oxide cathodes, spinel oxide cathode material MgCrMnO 4, cation migration mechanisms, Mg-ion batteries, operando diffraction data, MgCrMnO 4 cathode, voltage hysteresis, custom operando battery device, Spinel Cathodes |
| الوصف: |
A promising high-voltage spinel oxide cathode material MgCrMnO 4 with 18% Mg/Mn inversion was synthesized successfully. A new custom operando battery device was designed to study the cation migration mechanisms of the MgCrMnO 4 cathode using 0.1 M Mg(TPFA) 2 electrolyte dissolved in triglyme and activated carbon as the anode. For the first time in multivalent batteries, high-quality operando diffraction data enabled the accurate quantification of cation contents in the host structure. Besides the exceptional reversibility of 12% Mg 2+ insertion in Mg 1– x CrMnO 4 ( x ≤ 1), a partially reversible insertion of excess Mg 2+ during overdischarging was also observed. Moreover, the insertion/extraction reaction was experimentally shown to be accompanied by a series of cation redistributions in the spinel framework, which were further supported by density functional theory calculations. The inverted Mn is believed to be directly involved in the cation migrations, which would cause voltage hysteresis and irreversible structural evolution after overdischarging. Tuning the Mg/Mn inversion rate could provide a direct path to further optimize spinel oxide cathodes for Mg-ion batteries, and more generally, the operando techniques developed in this work should play a key role in understanding the complex mechanisms involved in multivalent ion insertion systems. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Operando_X_ray_Diffraction_Studies_of_the_Mg-Ion_Migration_Mechanisms_in_Spinel_Cathodes_for_Rechargeable_Mg-Ion_Batteries/14933305 |
| DOI: |
10.1021/jacs.1c04098.s001 |
| الاتاحة: |
https://doi.org/10.1021/jacs.1c04098.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.58696875 |
| قاعدة البيانات: |
BASE |