Effects of Feed Rate and pH Value on the Physical and Electrochemical Properties of LiNi0.4Co0.2Mn0.4O2 Cathode Material for Lithiumion Battery

Fang Du; Liang Fu Peng

doi:10.4028/www.scientific.net/AMR.989-994.462

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 989-994Effects of Feed Rate and pH Value on the Physical...

Effects of Feed Rate and pH Value on the Physical and Electrochemical Properties of LiNi_0.4Co_0.2Mn_0.4O₂ Cathode Material for Lithiumion Battery

Abstract:

The layered LiNi0.4Co0.2Mn0.4O2was synthesized by co-precipitation method using carbonate sodium as precipitant. The microscopic structural features and morphologies of as-prepared cathode materials were investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). And then, the charge-discharge measurements were carried out to determine the electrochemical properties in a voltage range of 2.5-4.6 V. The results show that the pH value in the process of co-precipitation reaction plays a greater part on the electrochemical properties than feed rate does. The cathode materials prepared at higher pH value illustrate better electrochemical properties in the voltage range of 2.5-4.6 V, which can be attributed to a less cation mixing in the cathode material as well as the smaller primary particles and the smaller second particles.

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Periodical:

Advanced Materials Research (Volumes 989-994)

Pages:

462-466

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.989-994.462

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Online since:

July 2014

Authors:

Fang Du*, Liang Fu Peng

Keywords:

Cathode Material, Co-Precipitation Method, Electrochemical Properties, LiNi_0.4Co_0.2Mn_0.4O₂, Morpholoy

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