Carbon-coated mesoporous Co9S8 nanoparticles on reduced graphene oxide as a long-life and high-rate anode material for potassium-ion batteries

Carbon‐based anode materials for potassium‐ion batteries: From material, mechanism to performance

“…Different from the particle morphology of the alloying materials, the morphology of intercalation‐conversion materials could be various like nanosheets, nanorods, nanowires, and other shapes. Thus, the extensive unique structures of carbon‐based intercalation‐conversion composite materials were proposed to better play the buffering role of the carbon skeleton and better utilize the reactivity of active materials, such as N/P co‐doped porous carbon sheets/CoP hybrids, 117 candied‐haws‐like FeS 2 @C core‐shell particles, 118 carbon‐coated mesoporous Co 9 S 8 nanoparticles on RGO, 119 yolk‐shell structured FeP@C nanoboxes, 120 Sb 2 S 3 @carbon nanowires, 121 sandwich‐like MoS 2 @SnO 2 @C, 122 and so on. Yolk‐shell FeS 2 @C structure on graphene matrix, applied as anode for PIBs, delivered a high reversible charge capacity of 451 mA h/g 88 .…”

N, P-codoped graphene supported few-layered MoS2 as a long-life and high-rate anode materials for potassium-ion storage

“…As attractive alternatives to lithium-ion batteries (LIBs), sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) have recently attracted great interest for large-scale energy storage due to natural abundance and low cost of Na/K resources [1,2]. In contrast to Na + , K + possesses a lower redox potential (K + /K, −2.92 V vs. standard hydrogen electrode (SHE); Na + /Na, −2.71 V vs. SHE), indicating that PIBs would have a larger energy density and a higher open-circuit voltage than SIBs [3,4]. Besides, the smaller Stokes' radius of K + (3.6 Å) than those of Na + (4.6 Å) and Li + (4.8 Å) in propylene carbonate suggests its high ionic conductivity and ionic mobility [5,6].…”

Co9S8@carbon nanofiber as the high-performance anode for potassium-ion storage

“…To further explore the chemical binding states of Co 9 S 8 @carbon, XPS was carried out, which is consistent with the previous reported results. 24,25 As shown in Fig. S1a, The Co 9 S 8 @carbon nanober architecture was detected by electron microscopy scanning (SEM).…”