LiCoPO4 cathode from a CoHPO4·xH2O nanoplate precursor for high voltage Li-ion batteries

Daiwon Choi; Xiaolin Li; Wesley A Henderson; Qian Huang; Satish K Nune; John P Lemmon; Vincent L Sprenkle

doi:10.1016/j.heliyon.2016.e00081

LiCoPO4 cathode from a CoHPO4·xH2O nanoplate precursor for high voltage Li-ion batteries

Heliyon. 2016 Feb 26;2(2):e00081. doi: 10.1016/j.heliyon.2016.e00081. eCollection 2016 Feb.

Authors

Daiwon Choi¹, Xiaolin Li¹, Wesley A Henderson¹, Qian Huang¹, Satish K Nune¹, John P Lemmon¹, Vincent L Sprenkle¹

Affiliation

¹ Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA99352, USA.

Abstract

A highly crystalline LiCoPO4/C cathode material has been synthesized without noticeable impurities via a single step solid-state reaction using CoHPO4·xH2O nanoplate as a precursor obtained by a simple precipitation route. The LiCoPO4/C cathode delivered a specific capacity of 125 mAhg(-1) at a charge/discharge rate of C/10. The nanoplate precursor and final LiCoPO4/C cathode have been characterized using X-ray diffraction, thermogravimetric analysis - differential scanning calorimetry (TGA-DSC), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) and the electrochemical cycling stability has been investigated using different electrolytes, additives and separators.

Keywords: Alternative energy technologies; Materials chemistry; Materials science; Materials synthesis; Nanomaterials.