▌Scalable thin-flake oxide solid-state electrolytes with multi-level stability for high-performance lithium–sulfur batteries
可量產且具多層級穩定性的薄片氧化物固態電解質用於高性能鋰硫電池
Yuan-Chin Chu, Kuan-Zong Fung and Sheng-Heng Chung*
https://doi.org/10.1016/j.ensm.2026.105141
SEED Member: Sheng-Heng Chung

Major Contributions
1. Pioneered a scalable tape-casting and hot-pressing strategy to fabricate thin-flake Li₀.₃₄La₀.₅₆TiO₃ (LLTO) solid-state electrolytes with controllable thicknesses of 50–200 µm, high relative density and mechanical strength.
2. Showed that electrolyte thickness governs lithium content, phase stability, ionic conductivity and interfacial resistance; a two-layer LLTO balances short Li⁺ diffusion paths with lithium retention, reaching ~1.5 × 10⁻³ S cm⁻¹.
3. Li//Li cells cycle stably for over 1000 h and Li//Cu cells reach 99% Coulombic efficiency over 500 cycles; Li–S cells deliver 1173 mAh g⁻¹ for 200 cycles, and 3 mg cm⁻² sulfur cathodes reach 3 mAh cm⁻².
主要貢獻
1. 首創以刮刀成型搭配熱壓的可量產製程,製備厚度可控(50–200 µm)、高相對密度與高機械強度的薄片 Li₀.₃₄La₀.₅₆TiO₃(LLTO)固態電解質。
2. 證明電解質厚度決定鋰含量、相穩定性、離子導電度與界面阻抗;兩層 LLTO 兼顧短 Li⁺ 擴散路徑與足夠的鋰保留,離子導電度約 1.5 × 10⁻³ S cm⁻¹。
3. Li//Li 對稱電池穩定循環超過 1000 小時,Li//Cu 半電池 500 圈庫倫效率 99%;鋰硫全電池最高容量 1173 mAh g⁻¹、壽命 200 圈,硫載量 3 mg cm⁻² 時面積容量達 3 mAh cm⁻²。




