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Title: Preparation and electrochemical characterization of micron-sized spinel LiMn{sub 2}O{sub 4}

Abstract

The preparation and characterization of spinel LiMn{sub 2}O{sub 4} having small average particle sizes (<4.0 {micro}m) and narrow particle size distribution are reported. They were obtained by heating a 1:4 Li{sub 2}CO{sub 3}/MnCO{sub 3} mixture at 650 to 850 C in oxygen. Particle size control of the product was achieved by controlling the particle sizes of the precursor materials and the heating conditions. Heating the Li{sub 2}CO{sub 3}/4MnCO{sub 3} mixture results in the formation of Mn{sub 2}O{sub 3} initially, which then reacts with Li{sub 2}CO{sub 3} to form spinel LiMn{sub 2}O{sub 4} according to: 2Li{sub 2}CO{sub 3} + 4 Mn{sub 2}O{sub 3} + O{sub 2} {yields} 2CO{sub 2}. The LiMn{sub 2}O{sub 4} cathodes have shown excellent rechargeability as well as superior rate capability in Li/polymer electrolyte/LiMn{sub 2}O{sub 4} cells cycled between 3.0 and 4.3 V. Specific capacities between 0.75 and 0.83 /Li per LiMn{sub 2}O{sub 4} were obtained for more than fifty cycles. The LiMn{sub 2}O{sub 4} cathodes can be reversibly cycled between 2.4 and 3.5 V but with declining capacity. For the LiMn{sub 2}O{sub 4} prepared at 650 C, cycling in the 3 V region has little effect on its subsequent performance in the 4 V region, while formore » the LiMn{sub 2}O{sub 4} prepared at higher temperatures, such cycling causes the 4 V capacity to decline.« less

Authors:
;  [1]
  1. EIC Labs., Inc., Norwood, MA (United States)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
256813
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 143; Journal Issue: 5; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; LITHIUM OXIDES; CHEMICAL PREPARATION; MANGANESE OXIDES; ELECTRIC BATTERIES; CATHODES; LITHIUM CARBONATES; MANGANESE CARBONATES; SPINELS

Citation Formats

Jiang, Z, and Abraham, K M. Preparation and electrochemical characterization of micron-sized spinel LiMn{sub 2}O{sub 4}. United States: N. p., 1996. Web. doi:10.1149/1.1836684.
Jiang, Z, & Abraham, K M. Preparation and electrochemical characterization of micron-sized spinel LiMn{sub 2}O{sub 4}. United States. https://doi.org/10.1149/1.1836684
Jiang, Z, and Abraham, K M. 1996. "Preparation and electrochemical characterization of micron-sized spinel LiMn{sub 2}O{sub 4}". United States. https://doi.org/10.1149/1.1836684.
@article{osti_256813,
title = {Preparation and electrochemical characterization of micron-sized spinel LiMn{sub 2}O{sub 4}},
author = {Jiang, Z and Abraham, K M},
abstractNote = {The preparation and characterization of spinel LiMn{sub 2}O{sub 4} having small average particle sizes (<4.0 {micro}m) and narrow particle size distribution are reported. They were obtained by heating a 1:4 Li{sub 2}CO{sub 3}/MnCO{sub 3} mixture at 650 to 850 C in oxygen. Particle size control of the product was achieved by controlling the particle sizes of the precursor materials and the heating conditions. Heating the Li{sub 2}CO{sub 3}/4MnCO{sub 3} mixture results in the formation of Mn{sub 2}O{sub 3} initially, which then reacts with Li{sub 2}CO{sub 3} to form spinel LiMn{sub 2}O{sub 4} according to: 2Li{sub 2}CO{sub 3} + 4 Mn{sub 2}O{sub 3} + O{sub 2} {yields} 2CO{sub 2}. The LiMn{sub 2}O{sub 4} cathodes have shown excellent rechargeability as well as superior rate capability in Li/polymer electrolyte/LiMn{sub 2}O{sub 4} cells cycled between 3.0 and 4.3 V. Specific capacities between 0.75 and 0.83 /Li per LiMn{sub 2}O{sub 4} were obtained for more than fifty cycles. The LiMn{sub 2}O{sub 4} cathodes can be reversibly cycled between 2.4 and 3.5 V but with declining capacity. For the LiMn{sub 2}O{sub 4} prepared at 650 C, cycling in the 3 V region has little effect on its subsequent performance in the 4 V region, while for the LiMn{sub 2}O{sub 4} prepared at higher temperatures, such cycling causes the 4 V capacity to decline.},
doi = {10.1149/1.1836684},
url = {https://www.osti.gov/biblio/256813}, journal = {Journal of the Electrochemical Society},
number = 5,
volume = 143,
place = {United States},
year = {Wed May 01 00:00:00 EDT 1996},
month = {Wed May 01 00:00:00 EDT 1996}
}