Polyvinylpyrrolidone-assisted synthesis of microscale C-LiFePO4 with high tap density as positive electrode materials for lithium batteries
Polyvinylpyrrolidone-assisted synthesis of microscale C-LiFePO4 with high tap density as positive electrode materials for lithium batteries
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DOI：
10.1016/j.electacta.2009.10.007
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发表时间：
2010-01-01
影响因子：
6.6
通讯作者：
Sun, Yang-Kook
中科院分区：
文献类型：
--
作者：
Oh, Sung Woo;Myung, Seung-Taek;Sun, Yang-Kook
以球形FePO4中心点2H(2)O粉末为原料，采用共沉淀法制备了粒径为微米（6 μ m）、密度为1.6 g cm（-3）的碳包覆LiFePO4 （C-LiFePO4）。C- lifepo4粉末在650 ~ 800℃的温度下煅烧，在800℃下制备的6 μ m C- lifepo4具有优异的倍率性能，在0.1℃的倍率下放电时可提供150 mAh g(-1)，在5℃的倍率下可提供108 mAh g（-1）。6 μ m C-LiFePO4的体积容量相当于225 mAh cm(-3)，因为大的次级颗粒（6 μ m） C-LiFePO4足以使颗粒紧密堆积。6 μ m C-LiFePO4粉末具有高接头密度，是高能量密度锂离子电池的极具吸引力的正极候选材料。(c) 2009 Elsevier Ltd.版权所有。
Carbon-coated LiFePO4 (C-LiFePO4) with micron particle size (6 mu m) and high tap density (1.6 g cm(-3)) was prepared from spherical FePO4 center dot 2H(2)O powder via the co-precipitation method. The C-LiFePO4 powder was calcined at temperatures between 650 and 800 degrees C. The 6 mu m C-LiFePO4 prepared at 800 degrees C exhibited an excellent rate capability, delivering 150 mAh g(-1) on discharge at the 0.1 C-rate and 108 mAh g(-1) at the 5 C-rate. The volumetric capacity of the 6 pm C-LiFePO4 corresponded to 225 mAh cm(-3), since the large secondary particles (6 mu m) C-LiFePO4 Sufficiently allowed tight packing of the particles. The 6 mu m C-LiFePO4 powder with high tap density makes an attractive positive electrode candidate for lithium-ion batteries designed for high energy density. (c) 2009 Elsevier Ltd. All rights reserved.