Synthesis of lithium and manganese-rich cathode materials via an oxalate co-precipitation method

Dapeng Wang, Ilias Belharouak, Guangwen Zhou, Khalil Amine

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The synthesis of Li- and Mn- rich cathode materials with oxalate co-precipitation method was comprehensively investigated. Thermodynamic calculation and advanced characterizations were conducted to study the effects of reaction pH and precipitation agent on the morphology and composition of the precipitates. It was found that manganese oxalate has a higher solubility compared to nickel oxalate, especially at low reaction pH. In addition, the different capability of Ni2+ and Mn2+ to form transition metal ammonia complexes led to a composition discrepancy in the precipitation. The desired nickel manganese oxalate precursor composition could only be achieved when these factors were considered, and cathode materials synthesized based on this precursor exhibited satisfactory electrochemical performance (about 220 mAh · g-1 over 70 cycles under C/10 rate).

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume160
Issue number5
DOIs
Publication statusPublished - 8 Apr 2013
Externally publishedYes

Fingerprint

Oxalates
oxalates
Manganese
Coprecipitation
Lithium
manganese
Cathodes
lithium
cathodes
synthesis
Nickel
Chemical analysis
nickel
Transition metals
Precipitates
Ammonia
Solubility
Thermodynamics
ammonia
precipitates

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Synthesis of lithium and manganese-rich cathode materials via an oxalate co-precipitation method. / Wang, Dapeng; Belharouak, Ilias; Zhou, Guangwen; Amine, Khalil.

In: Journal of the Electrochemical Society, Vol. 160, No. 5, 08.04.2013.

Research output: Contribution to journalArticle

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