MOF-driven ultra-small hollow Co₉S₈ nanoparticles embedded in porous carbon for lithium-ion batteries

Abstract

Abstract

Porous carbon-confined CoxSy nanoparticles derived from ZIF-67 for boosting lithium-ion storage

“…peaks (803.72 eV/783.12 eV). 8,22 It is worth mentioning that the S 2p spectrum ( Fig. 3c ) is assigned as S 2− (162.53 eV) and S n 2− (163.92 eV), indicating the successful preparation of cobalt–sulfur compounds.…”

“…peaks (803.72 eV/783.12 eV). 8,22 It is worth mentioning that the S 2p spectrum (Fig. 3c) is assigned as In addition, SEM and TEM were used to observe the morphological structure of the prepared materials.…”

“…3c ) is assigned as S 2− (162.53 eV) and S n 2− (163.92 eV), indicating the successful preparation of cobalt–sulfur compounds. 8,14,30 …”

“…[5][6][7] Therefore, it is necessary and urgent to nd highperformance electrode materials with high-capacity, favorable cyclability and so on for LIBs to compensate the disadvantages of current electrode materials. [8][9][10][11] Transition metal suldes (TMSs) are considered as one of the most promising anode materials for lithium-ion batteries because they not only have a high specic capacity, but also generally exhibit good electrical conductivity, and excellent mechanical and thermal stability. 12 Among them, cobalt suldes (Co x S y ) with excellent electrochemical activity and high theoretical capacity (>400 mA h g À1 ), as a subset of transition metal suldes, have been extensively investigated in lithium-ion battery anodes.…”

“… 5–7 Therefore, it is necessary and urgent to find high-performance electrode materials with high-capacity, favorable cyclability and so on for LIBs to compensate the disadvantages of current electrode materials. 8–11 …”