Optimal Charge and Discharge Capacity Effects of the Sintering Process on LiMn₂O₄ by the Solid-State Reaction Method

Abstract:

This study investigates the optimal charge and discharge capacity of the sintering process on the lithium battery spinel - LiMn₂O_4. Both Li₂CO₃ and Mn₃O₄ are utilized to synthesize the cathode material LiMn₂O₄ using the solid-state reaction. Cathode materials are processed to fabricate batteries at temperatures ranging from 800°C to 900°C. Test results reveal that the highest initial discharge capacity of 105.19 mAhg^-1 (theoretically at 148 mAhg^-1) has been obtained at the temperature of 850°C in the sintering process for synthesis of LiMn₂O₄. In addition, the initial discharge capacity can be increased to 140.51 mAhg^-1 with both overdosing the amount of lithium by 2% and increasing the range of operating voltage. The increasing of the charge voltage ranges from 4.5V to 4.8V and reducing of the discharge voltage ranges from 3.0V to 2.8V.

• Periodical: Applied Mechanics and Materials (Volume 377)
• Pages: 141-145
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.377.141
• Online since: August 2013
• Authors: Yen Chun Liu, Mao Chieh Chi, Ming Cheng Liu
• Keywords: Sintering, Solid-State Reaction, Spinel

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