- [Inside back cover] Concurrent electrode–electrolyte interfaces engineering via nano-Si3N4 additive for high-rate, high-voltage
- 관리자 |
- 2025-04-11 10:48:43|
- 28
- 2025-04-11 10:48:43|
ㅇ [Title] Concurrent electrode–electrolyte interfaces engineering via nano-Si3N4 additive for high-rate, high-voltage lithium metal batteries
ㅇ [Journal] Energy Environ. Sci., 2025, 18, 3148-3159
ㅇ [Author] Jinuk Kim, ‡ Dong Gyu Lee,‡ Ju Hyun Lee,‡ Saehun Kim, ‡ Cheol-Young Park, Jiyoon Lee, Hyeokjin Kwon, Hannah Cho, Jungyoon Lee, Donghyeok Son, Hee-Tak Kim,
a Nam-Soon Choi, *Tae Kyung Lee * and Jinwoo Lee
ㅇ [Abstrct]
Electrolyte engineering is emerging as a key strategy for enhancing the cycle life of lithium metal batteries (LMBs). Fluorinated electrolytes have dramatically extended cycle
life; however, intractable challenges in terms of rate capability and fluorine overuse persist. Here, we introduce a lithiophilic, solvent-interactive, and fluorine-free nano-Si3N4
additive that facilitates the fine-tuning of weak Li+solvation to form inorganic-rich solid–electrolyte interphase (SEI) layers. Additionally, the alloying and conversion reactions
between nano-Si3N4 and Li generated a fast Li+-conductive SEI, overcoming the poor rate performance of weakly solvating electrolytes. Simultaneously, nano-Si3N4 interacts
with ethylene carbonate (EC), minimizing hydrogen (H)-transfer reactions and scavenging HF, thus increasing the high-voltage tolerance. Consequently, nano-Si3N4 extends
the cyclability of the commercial carbonate-based electrolyte in 360 W h kg−1-level Li||LiNi0.8Co0.1Mn0.1O2 (NCM811) pouch-cells, resulting in 74% capacity retention after
100 cycles, whereas failure occurred without it. Our study provides an in-depth understanding of the working mechanisms of suspension electrolytes through comprehensive
analysis.
| 첨부파일 |
|
|---|