Synthesis and electrochemical performance of layered lithium–sodium manganese oxide as a cathode material for lithium ion batteries

• Published in: Journal of power sources Vol. 238; pp. 372 - 375
• Main Authors: Du, Ke, Ryu, Kwang-Sun, Huang, Dianhua, Hu, Guorong
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.09.2013; Elsevier
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Discharge; Displays; Electric potential; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Ion exchange; Lithium ion batteries; Lithium–sodium manganese oxide; Manganese oxides; Materials; Mixed ions cathode material; Solid phases; Synthesis; Voltage; Lithium ion batteries; Ion exchange; Lithium–sodium manganese oxide; Mixed ions cathode material; Cathode; Alkaline storage battery; Lithium Oxides; Ions; Secondary cell; Lithium-sodium manganese oxide; Electrode material; Electrochemical characteristic; Lithium battery; Sodium; Manganese Oxides; Chemical synthesis; Electrical characteristic
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2013.04.059

Na0.6[Li0.2Mn0.8]O2 has been synthesized at different calcination temperatures by a solid state method. Its phase structure and electrochemical properties are investigated and discussed. Na0.6[Li0.2Mn0.8]O2 prepared at 600 °C shows a complicated structure and wonderful electrochemical performance. In the voltage range of 2.0 and 4.8 V, Na0.6[Li0.2Mn0.8]O2/Li cell delivers an initial discharge capacity of 247 mAh g−1 with an average voltage of 3.52 V, which demonstrates a very high energy density of 869 Wh kg−1. Furthermore, the material displays a stable capacity greater than 240 mAh g−1 over 30 cycles. •Na0.6[Li0.2Mn0.8]O2 delivers an initial discharge capacity of 247 mAh g−1 in a lithium battery.•Na0.6[Li0.2Mn0.8]O2 shows an initial average voltages of 3.52 V and energy density of 869 Wh kg−1.•Na0.6[Li0.2Mn0.8]O2 can be prepared by the classic solid state method with simple raw materials.