Accession Number : AD1017821

Title :   Synthesis and Electrochemical Performance of LixMn2-yCoyO4-dCld Cathode Material

Descriptive Note : Conference Paper

Corporate Author : U.S. Army Communications-Electronics Research, Development and Engineering Center Aberdeen Proving Grounds United States

Personal Author(s) : Atwater,Terrill B ; Latorre,Paula C ; Ruth , Ashley L

Full Text :

Report Date : 13 Jun 2016

Pagination or Media Count : 4

Abstract : Lithium manganese oxide spinel is a potential candidate for Li-ion battery cathodes because of its low toxicity, comparable capacity, and low cost. However, this spinel suffers from capacity fading due to fracturing of the cell structure. Historically, cycle life enhancements of spinels have been achieved through transition metal doping on the B site of the lattice. In this effort, dopants of interest include compounds containing Group VIII Row 4 (Fe, Co, and Ni) elements, cobalt in particular. In addition to fabrication method variants of this material, the electrochemical performance and cycle life data of the Co B site and Cl O site manganese-based AB2O4 spinel is presented in this paper. Lithium electrochemical cells with Co B and Cl O site doping of a Mn-based AB2O4 spinel cathode have demonstrated the following: 1) full reversibility between 4.5 V and 2.0 V, 2) low charge/discharge overpotential between 4.5 V and 3.5 V, 3) high specific capacity of 240 mAh/g of active material, and 4) high rate charge and discharge.

Descriptors :   lithium batteries , SPINEL , electrochemical cells , doping , crystal structure , manganese

Distribution Statement : APPROVED FOR PUBLIC RELEASE