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學術研究
學術研究

Functionalized two-dimensional carbon fillers for enhancing Li+ conduction and interface stability of solid electrolyte for lithium batteries
功能化二維碳填料增強固態電解質鋰電池的 Li⁺ 傳導與界面穩定性


A. Panda, J. C. Kao, J. Patra, C. W. Pao, C. C. Yang*, C. T. Hsieh, F. M. Wang, W. R. Liu, J. Li, C. Y. Su*, Y. C. Lo* and J. K. Chang*
https://doi.org/10.1016/j.compositesb.2026.113503
SEED Member: F. M. Wang, J. K. Chang

 
 

Major Contributions
 

1. Fluorinated graphene oxide (FGO) is identified as the optimal 2D filler in composite solid electrolytes (CSEs), achieving ionic conductivity of 9.4 × 10⁻⁴ S cm⁻¹ at 25°C, Li⁺ transference number of 0.60, and wide electrochemical window (~4.8 V).

2. DFT reveals that positively charged C atoms bonded with fluorine on FGO promote TFSI⁻ dissociation and enhance Li⁺ mobility, providing atomic-level understanding of improved ionic transport in FGO-containing CSEs.

3. Li||FGO-CSE||NCM-811 cells deliver 200 mAh g⁻¹ cathode capacity retaining 95% after 350 cycles at 25°C, confirming FGO-CSEs stabilize both anode and cathode interfaces in solid-state Li-metal batteries.




主要貢獻
 

1. 氟化氧化石墨烯(FGO)被確定為複合固態電解質(CSE)中的最佳二維填料,在 25°C 下實現離子導電率 9.4 × 10⁻⁴ S cm⁻¹、Li⁺ 遷移數 0.60 及寬電化學窗口(約 4.8 V)。

2. DFT 揭示 FGO 上氟鍵合的帶正電 C 原子促進 TFSI⁻ 解離並增強 Li⁺ 移動性,提供 FGO 基 CSE 離子傳輸改善的原子層面理解。

3. Li||FGO-CSE||NCM-811 電池在 25°C 下 350 次循環後容量保持率達 95%,正極容量為 200 mAh g⁻¹,確認 FGO-CSE 有效穩定固態鋰金屬電池的陽極與陰極界面。