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Citation: ZHANG Chun-Ling, JIANG Wei-Jun, ZHANG Jing, QI Lu. Performance of LiMn_1.5Ni_0.5-xCu_xO₄ as 5V Cathode Material for Lithium-ion Battery[J]. Acta Physico-Chimica Sinica, ;2007, 23(0): 31-35. doi: 10.3866/PKU.WHXB2007Supp08 shu

Performance of LiMn_1.5Ni_0.5-xCu_xO₄ as 5V Cathode Material for Lithium-ion Battery

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CITIC Guoan Mengguli New Engery Technology Co. Ltd., Beijing 102200, P. R. China; New Energy Material and Technology Laboratory, Department of Applied Chemistry, College of Chemical and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Available Online: 4 January 2008

The product LiMn1.5Ni0.5-xCuxO4 with cubic spinel structure was synthesized by a chemical co-precipication method. MnSO4·H2O, NiSO4·6H2O, CuCl2·2H2O, NaOH, NH3·H2O and LiOH·H2O were used as the initial materials. The LiMn1.5Ni0.5-xCuxO4 powder was characterized by X-ray diffraction, scanning electron microscopy, tap density testing and electrochemical testing. The LiMn1.5Ni0.5-xCuxO4 material synthesized by two-stage process delivers a discharge capacity of 129.4 mAh·g-1 and 127.1 mAh·g-1 in the range of 3.0-5.0 V at the discharge current density of 0.50 mA·cm-2 and 2.00 mA·cm-2 individually. The material synthesized by three-stage process has a perfect cycle performance. Its discharge capacity can retain more than 98% of the initial capacity after 50 cycles between 3.0 and 5.0 V. Tap density of the material synthesized by three-stage process reaches 2.1 g·cm-3. In addition, the cycle performance of material synthesized was discussed with graphite as the anode. The average numerical decrement of discharge capacity is 1.7‰ after 200 cycles at the discharge current density of 2.00 mA·cm-2.
- Lithiumion battery; Co-precipitation; 5 V Cathode material; Spinel LiMn1.5Ni0.5-xCuxO4
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Performance of LiMn1.5Ni0.5-xCuxO4 as 5V Cathode Material for Lithium-ion Battery

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通讯作者: 陈斌, bchen63@163.com

Performance of LiMn_1.5Ni_0.5-xCu_xO₄ as 5V Cathode Material for Lithium-ion Battery