Study on Li3V2(PO4)3/C cathode materials prepared using pitch as a new carbon source by different approaches

Study of palladium and boric acid ion co-doped Li3V2(PO4)3/C cathode material with high performance

A palladium and boric acid ion co-doped Li₃V₂(PO₄)₃/C composite was successfully synthesized by a simple method. A series of characteristics, such as its microstructures and electrochemical properties, were studied. The results show that the modified materials have relatively regular spherical particles and good electrochemical performances for cathode materials. It delivers a high special capacity of 159.2 mA h g⁻¹ at 0.2C and 128.9 mA h g⁻¹ at 5C in the voltage range of 2–4.3 V. After cycling at different rates, the initial discharge capacity retention rate was 97.5%. The enhanced electrochemical properties indicate that the modification method, using anions and cations to collaborative dope the material, effective to improve the electrochemical performance of the electrode material.

A palladium and boric acid ion co-doped Li₃V₂(PO₄)₃/C composite was successfully synthesized by a simple method.

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

The performance of electrode materials in lithium-ion (Li-ion), sodium-ion (Na-ion) and related batteries depends not only on their chemical composition but also on their microstructure. The choice of a synthesis method is therefore of paramount importance. Amongst the wide variety of synthesis or shaping routes reported for an ever-increasing panel of compositions, spray-drying stands out as a versatile tool offering demonstrated potential for up-scaling to industrial quantities. In this review, we provide an overview of the rapidly increasing literature including both spray-drying of solutions and spray-drying of suspensions. We focus, in particular, on the chemical aspects of the formulation of the solution/suspension to be spray-dried. We also consider the post-processing of the spray-dried precursors and the resulting morphologies of granules. The review references more than 300 publications in tables where entries are listed based on final compound composition, starting materials, sources of carbon etc.

Anthracite-Derived Dual-Phase Carbon-Coated Li3V2(PO4)3 as High-Performance Cathode Material for Lithium Ion Batteries

In this study, low cost anthracite-derived dual-phase carbon-coated Li₃V₂(PO₄)₃ composites have been successfully prepared via a traditional solid-phase method. XRD results show that the as-prepared samples have high crystallinity and anthracite introduction has no influence on the LVP crystal structure. The LVP/C particles are uniformly covered with a dual-phase carbon layer composed of amorphous carbon and graphitic carbon. The effect of the amount of anthracite on the battery performance of LVP as a cathode material has also been studied. The LVP/C composite obtained with 10 wt % anthracite (LVP/C-10) delivers the highest initial charge/discharge capacities of 186.1/168.2 mAh g^-1 at 1 C and still retains the highest discharge capacity of 134.0 mAh g^-1 even after 100 cycles. LVP/C-10 also displays an outstanding average capacity of 140.8 mAh g^-1 at 5 C. The superior rate capability and cycling stability of LVP/C-10 is ascribed to the reduced particle size, decreased charge-transfer resistance, and improved lithium ion diffusion coefficient. Our results demonstrate that using anthracite as a carbon source opens up a new strategy for larger-scale synthesis of LVP and other electrode materials with poor electronic conductivity for lithium ion batteries.

Large-scale synthesis of Li3V2(PO4)3@C composites by a modified carbothermal reduction method as cathode material for lithium-ion batteries

Carbon coated Li₃V₂(PO₄)₃composites were prepared by a modified carbothermal reduction method.

β-Cyclodextrin coated lithium vanadium phosphate as novel cathode material for lithium ion batteries

As a new carbon source, β-cyclodextrin was used to synthesize a Li₃V₂(PO₄)₃/C cathode material for LIB via a rheological phase method. The sample showed high capacity, good rate performance and cycle stability, and low resistance.

Stable high-rate cycling electrode based on Li3V2(PO4)3/C using polyamide as a novel carbon source

Polyamide, as a novel carbon source, was introduced for the first time into the synthesis of Li₃V₂(PO₄)₃/C cathode materials for lithium ion batteries through a carbon-thermal reduction method.