In this work, a multi-core–shell-structured LiFePO4@Na3V2(PO4)3@C (LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO4 cathode for lithium-ion batteries. Transmission electron microscopy (TEM) confirms the inner NVP outer carbon layers co-existed on surface LFP particle. When evaluated at operation, LFP@NVP@C exhibits an evident...

Lithium iron phosphate (LiFePO4) is a promising cathode material for lithium ion batteries because it can be synthesized from low cost starting materials, it is relatively non-toxic (compared with LiCoO2 or LiNiO2), and because it is intrinsically stable at potentials greater than 3.45 V [1]. The solidstate synthesis of LiFePO4 has therefore received much attention. However, this process is cos...

LiFePO4-Silicon doped has been widely developed as a battery cathode material. Due to the doping of silicon atoms, this study aims determine peak energy (E0), oxidation state and percentage component composition for Fe K-edge. The experimental sample used are LFP Si-0%, Si-1%, Si-3% Si-6%. These samples were characterized using XAS (X-ray Absorption Spectroscopy). XANES spectrum showed Pre-edge...

This work presents the recent progress in nanostructured materials used as positive electrodes in Li-ion batteries (LIBs). Three classes of host lattices for lithium insertion are considered: transition-metal oxides V2O5, α-NaV2O5, α-MnO2, olivine-like LiFePO4, and layered compounds LiNi0.55Co0.45O2, LiNi1/3Mn1/3Co1/3O2 and Li2MnO3. First, a brief description of the preparation methods shows th...

The scope of the current research is to characterize aging mechanisms in LiFePO4 battery cathodes at the nanometer length scale. For this purpose, we wish to use Electron Energy Loss Spectroscopy (EELS) in the low loss regime in the Transmission Electron Microscope (TEM) to identify and quantify the phases formed in the cathode as the battery is discharged. The above phase identification and qu...

Energy and environmental pollution have become the two major problems in today's society. The development of green energy storage devices with good safety, high reliability, high energy density and low cost are urgently demanded. Here we report on a lithium ion battery using an aqueous electrolyte solution. It is built up by using graphite coated with gel polymer membrane and LISICON as the neg...