Surface-patterned graphite electrode with hybrid polymer/garnet electrolyte for all-solid-state batteries

Kim, Dohwan; Bak, Cheol; Kim, Nayeon; Park, Joonam; Lee, Myeong Ju; Shin, Dong Ok; Lee, Young-Gi; Lee, Yongmin

doi:10.1016/j.mtsust.2023.100338

Cited by 1 publication

(1 citation statement)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 17,28–31 ] Thus, recent research efforts have been devoted to advancing sheet‐type SEs for ASSBs, leading to notable enhancements in their electrochemical performance and processability. [ 24,25,27,28,32 ] Reducing the thickness of freestanding SE membranes to the level of LIB separators is essential for commercially available ASSBs.…”

Section: Introductionmentioning

confidence: 99%

Thin, Highly Ionic Conductive, and Mechanically Robust Frame‐Based Solid Electrolyte Membrane for All‐Solid‐State Li Batteries

Kim,

Lee,

Roh

et al. 2023

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

A thin but robust solid electrolyte layer is crucial for realizing the theoretical energy density of all‐solid‐state batteries (ASSBs) beyond state‐of‐the‐art Li‐ion batteries (LIBs). This study proposes a simple but practical strategy for fabricating thin solid electrolyte membranes using 5‐µm perforated polyethylene separators with 35% open areas as the supporting component, which ensures mechanical robustness for commercial‐level cell assembly. The thickness of this frame‐based solid electrolyte (f‐SE) membrane can be reduced to ≈45 µm, even after coating the Li6PS5Cl (LPSCl) solid electrolyte composite. Despite a slightly lower ionic conductivity compared to that of thick LPSCl pellets, the f‐SE membranes show high conductance and low overpotential in Li||Li symmetric cells. Their incorporation into LiNi0.7Co0.15Mn0.15O2 full cells increases the reversible capacity and rate capability compared to those of cells with conventional LPSCl pellets. The f‐SE membrane cells exhibit excellent cycling stability over 250 cycles, while maintaining high‐capacity retention and Coulombic efficiency. Notably, the f‐SE membranes significantly increase the energy density of ASSBs (314 Wh kg−1), exceeding the values reported for sulfide‐based cells. These results highlight the crucial role of f‐SE membranes in improving the mechanical properties and energy density of ASSBs, thereby contributing to the development of next‐generation Li battery technologies.

show abstract

Section: Introductionmentioning

confidence: 99%