Preprint Article Version 1 This version is not peer-reviewed

Effects of Sodium Substitution on the Rate Performances of Spherical LiMn2O4 Cathode for Lithium Ion Batteries

Version 1 : Received: 15 November 2018 / Approved: 19 November 2018 / Online: 19 November 2018 (11:30:42 CET)

How to cite: Jiang, J.; Li, W.; Deng, H.; Xu, L. Effects of Sodium Substitution on the Rate Performances of Spherical LiMn2O4 Cathode for Lithium Ion Batteries. Preprints 2018, 2018110459 (doi: 10.20944/preprints201811.0459.v1). Jiang, J.; Li, W.; Deng, H.; Xu, L. Effects of Sodium Substitution on the Rate Performances of Spherical LiMn2O4 Cathode for Lithium Ion Batteries. Preprints 2018, 2018110459 (doi: 10.20944/preprints201811.0459.v1).

Abstract

Sodium substitution Li1-xNaxMn2O4 cathodes were synthesized by a solid-state reaction method. The morphologies and crystal structures of Li1-xNaxMn2O4 were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. All Li1-xNaxMn2O4 samples exhibited a single phase LiMn2O4 spinel structure with good crystallinity. The effect of Na+ ions on the electrochemical performance of Li1-xNaxMn2O4 was investigated by galvanostatic charge-discharge test. The results showed that lithium substituted by sodium deteriorated its capacity retention but enhance its discharge capacity when it worked at large current densities. The initial discharge capacity was 114.2 mAh/g for Li0.94Na0.06Mn2O4, and 93.1 mAh/g remained after 300 cycles at a current density of 2220 mA/g in the voltage range 3.0–4.3 V at room temperature.

Subject Areas

Lithium-Ion Battery; Cathode Material; Spinel LiMn2O4; Sodium Substitution

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