Effect of AlP coating on electrochemical properties of LiMn2O4 cathode material for lithium ion battery. (February 2016)

• Record Type: Journal Article
• Authors: Feng, Xiaoyu; Zhang, Jianxin; Yin, Longwei
• Is Part Of: Materials research bulletin. Volume 74(2016)
• Page Start: 421
• Page End: 424
• Publication Date: 2016-02
• Subjects: A. Inorganic compounds -- A. Surfaces -- A. Interfaces -- B. Chemical synthesis -- D. Electrochemical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.11.008
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Modified LiMn2 O4 surface with AlP successfully. AlP coating surface modification enhances the cycling stability of LiMn2 O4 at both room temperature and 60 °C. AlP coating surface modification improves the rate capability of LiMn2 O4 . Abstract: AlP-modified LiMn2 O4 has been synthesized via a simple chemical deposition method followed by high-temperature heating. The X-ray diffraction patterns, SEM images and Energy Dispersive Spectrometer show the successful surface coating of LiMn2 O4 by F-43 m crystal form AlP. AlP-modified LiMn2 O4 has a high discharge capacity of 125.7 mAh g −1 with retention of 87% at a current density of 1C between 3.3 V and 4.3 V after 100 cycles at 60 °C, while bare LiMn2 O4 has more than 28% capacity loss. At 10 rates, the coated sample delivers capacity of 100 mAh g −1, which is much higher than bare LiMn2 O4 . Based on the EIS (electrochemical impedance spectroscopy) result, AlP coating can effectively inhibit the increase of the charge transfer resistance during charging and discharging cycles.