Abstract
Spinel Zn doped Li2 CoMn3 O8 (or also known as LiCo0.5 Mn1.5 O4 ) yielding formula Li2 Co1-x Znx Mn3 O8 (0 ≤ x ≤ 1) were produced via conventional solid state method. XRD results and the variation of cell lattice and volume showed that the solid solution limit of these compositions was at x=0.6. Impurities were detected when the amount of Zn was beyond 60 %. The discharge capacities deteriorate as Zn content was increased. However, these Zn doped samples exhibited excellent cycle-ability (99.9% capacity retention) throughout 50 charging and discharging cycles which indicated that doping of Zn could possibly stabilised the spinel structure.
Highlights
The significant finding of the first Li-ion cells by Sony in the early 1990s has strongly motivated the researches for better performance active materials in order to provide energy storage for some major applications, such as portable electronic devices and other potential applications
Considering cathode materials contributed the most influence on the performance of current Li-ion batteries, a wide variety of studies on cathode materials have been done for the past few decades to fully understand the factors that influence the electrochemical performance of lithium ion batteries and at the same time reducing the cost and simplifying the fabrication process
This study reports the electrochemical performance of Zn doped Li2CoMn3O8
Summary
The significant finding of the first Li-ion cells by Sony in the early 1990s has strongly motivated the researches for better performance active materials in order to provide energy storage for some major applications, such as portable electronic devices and other potential applications. An alternative spinel LiMn2O4 based cathode materials have been proposed as one of the most anticipating cathode materials after the discovery of lithium intercalation-deintercalation reversibility in LiMn2O4 by Thackeray and co-workers [1] It is low cost, thermally stable and benevolent to the environment. One of the many solutions to reduce this fading is by replacing Mn partially by other elements (M) to increase the Mn valence in the spinel phase, and reducing the possibility of the presence of Jahn-Teller distortion Such doping includes Ru [4], Gd [5], Cu [6], Co [7], Al [8], Mg [9,10], Zn [11], Ni [12] and others. This study reports the electrochemical performance of Zn doped Li2CoMn3O8
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