التفاصيل البيبلوغرافية
| العنوان: |
Weakly Solvating Solution Enables Chemical Prelithiation of Graphite–SiO x Anodes for High-Energy Li-Ion Batteries |
| المؤلفون: |
Jinkwan Choi (10955375), Hyangsoo Jeong (1502629), Juyoung Jang (10955378), A-Re Jeon (10955381), Inyeong Kang (10955384), Minhyung Kwon (10955387), Jihyun Hong (1487320), Minah Lee (1487317) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Physiology, Developmental Biology, Chemical Sciences not elsewhere classified, chemical prelithiation method, High-Energy Li-Ion Batteries, energy density, prelithiated blend anode, Weakly Solvating Solution Enables C., near-ideal energy density |
| الوصف: |
Although often overlooked in anode research, the anode’s initial Coulombic efficiency (ICE) is a crucial factor dictating the energy density of a practical Li-ion battery. For next-generation anodes, a blend of graphite and Si/SiO x represents the most practical way to balance capacity and cycle life, but its low ICE limits its commercial viability. Here, we develop a chemical prelithiation method to maximize the ICE of the blend anodes using a reductive Li–arene complex solution of regulated solvation power, which enables a full cell to exhibit a near-ideal energy density. To prevent structural degradation of the blend during prelithiation, we investigate a solvation rule to direct the Li + intercalation mechanism. Combined spectroscopy and density functional theory calculations reveal that in weakly solvating solutions, where the Li + –anion interaction is enhanced, free solvated-ion formation is inhibited during Li + desolvation, thereby mitigating solvated-ion intercalation into graphite and allowing stable prelithiation of the blend. Given the ideal ICE of the prelithiated blend anode, a full cell exhibits an energy density of 506 Wh kg –1 (98.6% of the ideal value), with a capacity retention after 250 cycles of 87.3%. This work highlights the promise of adopting chemical prelithiation for high-capacity anodes to achieve practical high-energy batteries. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Weakly_Solvating_Solution_Enables_Chemical_Prelithiation_of_Graphite_SiO_sub_i_x_i_sub_Anodes_for_High-Energy_Li-Ion_Batteries/14766608 |
| DOI: |
10.1021/jacs.1c03648.s001 |
| الاتاحة: |
https://doi.org/10.1021/jacs.1c03648.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.E527C811 |
| قاعدة البيانات: |
BASE |