| 低热固相反应法在多元金属复合氧化物合成中的应用—锂离子电池正极材料LiCo0.8Ni0.2O2的合成、结构和电化学性能的研究 |
| Application of the Low-heating Solid-state Reaction Method in Preparation of Multi-metal Composite Oxides—Preparation, Structure and Electrochemical Properties of LiCo0.8Ni0.2O2 Cathode Material for Lithium-Ion Batteries |
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| 摘要: 以氢氧化锂、醋酸钴、醋酸镍和草酸为原料,采用低热固相反应法制备了锂离子电池正极材料LiCo0.8Ni0.2O2的前驱体。该前驱体在不同温度下焙烧制得LiCo0.8Ni0.2O2粉体样品。通过XRD和SEM技术对样品的结构和颗粒形貌进行了分析;采用BET法、激光散射技术和恒电流间歇滴定法(GITT)分别对比表面积、粒度分布和扩散系数等理化参数进行了测试。结果表明,样品颗粒是由许 |
| 关键词: LiCo0.8Ni0.2O2正极材料 低热固相反应法 锂离子电池 |
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| Abstract: The precursors of LiCo0.8Ni0.2O2 cathode material for lithium-ion batteries were prepared from lithium hydrox-ide, cobalt acetate, nickel acetate and oxalic acid by the method of low-heating solid-state reaction. The LiCo0.8Ni0.2O2 samples were obtained by sintering the precursors at different temperatures for 12h. Their structures and morphologies were characterized by powder XRD and SEM techniques, and their physico-chemical parameters such as specific areas, particle size distributions and diffusion coefficients were measured by BET method, laser scattering technique and galvanostatic intermittent titration technique (GITT), respectively. SEM photographs show that the samples are made up of the irregular porous granules, which are conglobated by many small spherical crystals. This is beneficial for electrolyte diffusing into the granules of the samples. Electrochemical tests show that the samples obtained in the sintering temperature range from 700℃ to 800℃ exhibit excellent electrochemical properties. |
| Keywords: LiCo0.8Ni0.2O2 cathode material low-heating solid-state reaction Li-ion batteries |
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| 唐新村,何莉萍,陈宗璋,贾殿赠.低热固相反应法在多元金属复合氧化物合成中的应用—锂离子电池正极材料LiCo0.8Ni0.2O2的合成、结构和电化学性能的研究[J].无机化学学报,2002,18(6):591-596. |
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