Negative Electrode Material For Li-ion Batteries Research Articles

Two-dimensional tetragonal Ti2BN: A novel potential anode material for Li-ion batteries

In this work, we theoretically design a new class of two-dimensional (2D) ternary transition-metal compound, namely, tetragonal Ti2BN monolayer sheet. The first-principles calculations proved that this system exhibits good dynamic and thermal stability, inherent metal properties and good mechanical properties. Additionally, we investigate the suitability of 2D Ti2BN as host materials in Li-ion batteries (LIBs). Our results show that the diffusion barrier of Li on surface (24 meV) and interlayer (165 meV) of Ti2BN monolayer are extremely low. At 300 K, their corresponding diffusion coefficient of Li are 6.08 × 10−3 and 0.028 × 10−3 cm s−1, respectively. Besides, it also exhibits extremely high theoretical capacity (889 mA h g−1) and low average open circuit voltage (0.24 V). All these advanced properties indicate that Ti2BN monolayer is a promising negative electrode material for LIBs. In order to facilitate the experimental synthesis of this material, wetheoretically predicted that Ag (1 0 0), Au (1 0 0) and Sn (1 0 0) may be good growth substrates for Ti2BN sheet.

One-Pot Synthesis of Carbon-Coated Nanostructured Iron Oxide on Few-Layer Graphene for Lithium-Ion Batteries.

Nanostructure engineering has been demonstrated to improve the electrochemical performance of iron oxide based electrodes in Li-ion batteries (LIBs). However, the synthesis of advanced functional materials often requires multiple steps. Herein, we present a facile one-pot synthesis of carbon-coated nanostructured iron oxide on few-layer graphene through high-pressure pyrolysis of ferrocene in the presence of pristine graphene. The ferrocene precursor supplies both iron and carbon to form the carbon-coated iron oxide, while the graphene acts as a high-surface-area anchor to achieve small metal oxide nanoparticles. When evaluated as a negative-electrode material for LIBs, our composite showed improved electrochemical performance compared to commercial iron oxide nanopowders, especially at fast charge/discharge rates.

Tin/Tinoxide (Sn/SnO2) Nanocomposites Thin Films as Negative-Electrode Materials for Li-Ion Batteries

Tin/Tinoxide (Sn/SnO₂) Nanocomposites Thin Films as Negative-Electrode Materials for Li-Ion Batteries

A novel tin-based nanocomposite oxide as negative-electrode materials for Li-ion batteries

Cobalt tin oxide (CoSnO 3), as a novel negative electrode material for lithium-ion batteries, was synthesized through the pyrolysis of CoSn(OH) 6 precursor. The powder X-ray diffraction (XRD) analysis and transmission electron microscopy (TEM) image indicated that the product is amorphous and composed of the small square flake, which has an average size of about 70 nm. The electrochemical performance of CoSnO 3 electrode material for Li-ion batteries was studied in the form of Li/CoSnO 3 cell. The results show that this nanocomposite has an improving electrochemical performance comparing with the mixture of CoO and SnO 2 ball milled.