Nanoparticulate Iron Oxide Tubes from Microporous Organic Nanotubes as Stable Anode Materials for Lithium Ion Batteries

Abstract

Röhren aus Röhren: Mikroporöse organische Nanoröhren wurden durch Sonogashira‐Kupplung zwischen Tetra(4‐ethinylphenyl)methan und N,N′‐Di(4‐iodphenyl)‐4,4′‐bipyridiniumdichlorid erhalten. Diese Nanoröhren dienten als Template für sekundäre anorganische Materialien, nämlich Fe2O3‐Nanoröhren mit hoher Entladekapazität und ausgezeichneter Stabilität.

Fe2O3 Nanoparticles Wrapped in Multi-walled Carbon Nanotubes With Enhanced Lithium Storage Capability

“…However, according to the discharge capacity (Fe 2 O 3 @MWCNTs: 515 mAhg −1 , MWCNTs: 248 mAhg −1 ) and mass ratio (Fe 2 O 3 : 29.68%, MWCNTs: 70.32%), the discharge capacity contributed by Fe 2 O 3 NPs can be calculated as 1147 mAhg −1 (Fig. S9), which is higher than the previous reports89101113141518192021. This high value is even larger than the theoretical capacity of Fe 2 O 3 (1007 mAhg −1 ), suggesting that such a MWCNTs wrapping structure can enhance the lithium storage capability of Fe 2 O 3 and ensure the complete reaction between Fe 2 O 3 and Li + ions.…”

“…When the fresh Fe 2 O 3 is exposes to the electrolyte again, the thicker of SEI film will increase with each charge/discharge cycle, which obviously leads to a degradation in battery performance12. In order to solve puzzle of Fe 2 O 3 anode materials, all kinds of approach including the synthesis of hollow-structured Fe 2 O 3 have been attempted131415. Although the hollow structure can provide high surface area, short lithium diffusion length to enhance the rate capacity and extra free space to alleviate the volume variation, it is still a challenge to deal with low conductivity and unstable SEI films of Fe 2 O 3 anode materials16.…”

Shape-Controllable Formation of Poly-imidazolium Salts for Stable Palladium N-Heterocyclic Carbene Polymers

“…Their growth process can be speculated to take place step by step according to different steric and electronic situations20. As shown in Figure 5, the growth of poly-imidazolium particles in the directions of length, width and thickness can be postulated as the formation of 1D chain by 1∶1 connection of BMT and BIM, interconnection of 1D chains to 2D network, and further connection to 3D network, respectively2627. The processes will occur at the same time and compete with each other.…”

Lithium Batteries

“…It confirms that electrospinning has emerged as a versatile and low cost method for producing long continuous porous fibers with diameters ranging from several micrometers down to a few nanometers by applying a high voltage on a polymer solution or melt. Remarkable results have also been obtained with γ-Fe 2 O 3 nanotubes showing a 102.1 m 2 g À1 surface area and 0.46 cm 3 g À1 total pore volume, although the electrochemical tests have been performed only over 30 cycles [610]. A simple synthesis method for hierarchical spheres with hollow interiors composed of ultrathin nanosheets of has also been reported [611].…”