Nano Research & Applications

Design and develop high performance LiFePO4/C nanocomposites as cathode materials for rechargeable lithium ion batteries by cation exchange process

17^th Edition of International Conference on Emerging Trends in Materials Science and Nanotechnology
April 26-27, 2018 Rome, Italy

Zongtao Zhang, Runwei Wang and Shilun Qiu

Jilin University, China

Posters & Accepted Abstracts: Nano Res Appl

DOI: 10.21767/2471-9838-C1-009

Abstract

Nanomaterials, so often reported by claims of delivering multifarious properties, have the genuine potential to make a significant impact on the performance of advanced energy storage and conversion devices (e.g. batteries, super capacitors, fuel cells and solar cells), especially in the high-power aspect, as the reduced dimensions enable far more accessible active surfaces as well as enhanced diffusion dynamics. Herein, we present our detailed work on a novel lithiation of amorphous hydrated FePO4, typically FePO4-PANI (polyaniline) composite, by a facile H+/Li+ ion exchange that was attentively deduced and studied with the help of several relevant chemical/physical analytical techniques. The resultant Li-derivative is proved to be a suitable precursor for yielding LiFePO4/C nanocomposite with ideal structural features containing highly crystalline LiFePO4 nanoparticles completely coated with N-doped conductive carbon. More importantly, the LiFePO4/C nanocomposite is capable of offering outstanding electrochemical performances for lithium-ion batteries in terms of high rate capability (~80.3 mAh g-1 at 100) and longterm cyclability (less than 3% discharge capacity loss over 600 cycles at 10) that were strongly supported by the results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests. zzhang@jlu.edu.cn sqiu@jlu.edu.cn