Effect of Nitric Acid Modification on LiMn₂O₄ Prepared by Solution Combustion Synthesis

Abstract:

Effect of nitric acid and the burning time on the liquid combustion synthesis of spinel LiMn₂O₄ has been studied, using lithium nitrite and Manganese acetate as raw a material. The results show that the main phases are all LiMn₂O₄, which can be obtained at 400-600 oC. Before modified, the impurity is Mn₃O₄ or Mn₂O₃. After modified, the impurity is only Mn₃O4. The aggregation obviously reduced after adding nitric acid, it is indicated that the crystalline increased. With the increasing temperatures, the modified particle size was increased and the aggregation reduced. The initial discharge capacity and cycle stability improved at some extent too. Its first discharge capacity was 104.6, 112.8 and 117.7mAh/g synthesized at 400, 500, 600 oC, respectively, and the 30^th capacity retention rate were 84.89%, 80.67% and 73.24%.

• Periodical: Applied Mechanics and Materials (Volumes 80-81)
• Pages: 332-336
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.80-81.332
• Online since: July 2011
• Authors: Yan Xia, Mei Huang, Jun Ming Guo, Ying Jie Zhang
• Keywords: Cathode Material, LiMn₂O₄, Lithium-Ion Battery, Nitric Acid, Solution Combustion Synthesis (SCS)

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