• Protective catalytic layer powering activity and stability of electrocatalyst for high-energy lithium-sulfur pouch cell
  • 관리자 |
  • 2025-03-19 10:50:50|
  • 8


ㅇ [Title]   Protective catalytic layer powering activity and stability of electrocatalyst for high-energy lithium-sulfur pouch cell
    
 
ㅇ [Journal]  Nature Communications

 
                                                                                                                                                                                                                      
ㅇ [Author]  Seoa Kim, Won-Gwang Lim, Hyeonjung Jung, Yo Chan Jeong, Cheol-Young Park, Seung Bo Yang, Chag Hoon Lee, Dongai Wang, Kwonnam Sohn,

                 Jeong Woo Han, Jinwoo Lee
 

ㅇ [Abstrct] 

Designing an electrocatalyst that simultaneously satisfies high catalytic activity and surface stability is essential for realizing high-performance lithium-sulfur (Li||S) batteries.

Here, we propose an advanced electrocatalyst by constructing a thin protective catalytic layer (PCL) on the surface of metal nanoparticle catalysts. This few atomic layer

thicknesses of the PCL composed of pyridinic N embedded graphitic carbon allows electrons to transfer from a metal nanoparticle to pyridinic N, resulting in an optimized p-

orbital level of pyridinic N of PCL favorable for highly active conversion reaction of lithium sulfide. Further, PCL suppresses the direct contact of sulfur species with metal

electrocatalysts. This surface protection effect inhibits the phase change of metal electrocatalysts to metal sulfide impurities, which maintains a highly active Li||S

electrocatalysis for long-term cycling. Consequently, A h-level Li||S pouch cell with >500 W h kg−1 (specific energy based on current collector, anode, separator, electrolyte, and

cathode), Coulombic efficiency (>95%), and stable life of 20 cycles was successfully realized.




 

 
첨부파일