Small, Год журнала: 2024, Номер unknown
Опубликована: Окт. 23, 2024
Abstract In response to mitigating the severe shuttle effect within lithium–sulfur batteries, single‐atom catalysts have emerged as one of most effective solutions. Here, N, F, B codoped porous hollow carbon nanocages (NFB‐NiFe@NC) with high Ni and Fe doping are rationally designed synthesized using ionic liquids (ILs) dopants. The introduction ILs inhibits growth zeolitic imidazolate framework‐8 (ZIF8), resulting in NFB‐ZIF8 precursors smaller particle sizes, enabling higher loading dual‐atom catalysts. Meanwhile, abundant heteroatoms increase reactive sites alter matrix's nonpolar intrinsic properties, thus enhancing chemisorption polysulfides. synergistic interaction dual‐atoms ultimately promotes catalytic conversion kinetics As a result these beneficial cells prepared NFB‐NiFe@NC modified separator exhibit significantly improved performance, including initial capacity 1448 mAh g −1 at 0.2 C. Even S‐loading 7.6 mg cm −2 , ideal area 8.38 can still be maintained 0.1 New insights provided here for designing highly loaded application batteries.
Язык: Английский