Construction of Fe7Se8@Carbon nanotubes with enhanced sodium/potassium storage

Electrochemically induced amorphous and porous VOx/N-doped carbon spheres as a cathode for advanced aqueous zinc-ion batteries

“…When the b-value equals 0.5, it represents a diffusion-controlled process. 39,40 When the b-value equals 1, it represents pseudocapacitive behavior. As observed in Fig.…”

FeF3@C nanotube arrays grown on carbon fabric as a free-standing cathode for lithium-ion batteries

“…The depressed semicircle reflects the charge transfer, and the sloping line reflects the Li + diffusion. The Li + diffusion coefficient for the FeF 3 @C nanotube arrays was determined based on the formulas (more details are provided in the ESI†): 51–53 Z = R + σ w w −1/2 D + Li = R 2 T 2 /2 n 4 F 4 σ w 2 A 2 C 2 …”

In Situ Synthesis of Amorphous GeSe/CNT Composite via Defective‐carbon‐mediated Chemical Bonding for Ultrastable Na Ion Storage

“…[2] Recently, layered metal chalcogenide compounds (LMCs) such as SnSe, WSe, BiSe, and MoSe have shown great promise as anode materials for NIBs because of their large interlayer space for Naion intercalation and narrow-bandgap semiconductor characteristics. [3][4][5][6][7][8][9][10][11] GeSe, a member of the LMC family, shows a high theoretical capacity of 883 mA h g À 1 and an interlayer distance of 5.41 Å that is large enough to allow Na-ion diffusion without undergoing significant structural distortion. [12,13] Nevertheless, GeSe has rarely been investigated for Na-ion storage.…”

“…Li‐ and Na‐ion storage mechanisms have some similarities; however, Na ions differ in that they cannot intercalate into the interlayer channels of graphite because of their larger ionic radius (1.02 Å) compared with that of Li ions (0.76 Å) [2] . Recently, layered metal chalcogenide compounds (LMCs) such as SnSe, WSe, BiSe, and MoSe have shown great promise as anode materials for NIBs because of their large interlayer space for Na‐ion intercalation and narrow‐bandgap semiconductor characteristics [3–11] . GeSe, a member of the LMC family, shows a high theoretical capacity of 883 mA h g −1 and an interlayer distance of 5.41 Å that is large enough to allow Na‐ion diffusion without undergoing significant structural distortion [12,13] .…”