Large scale synthesis of TiO2–carbon nanocomposites using cheap raw materials as anode for lithium ion batteries

Large scale synthesis of TiO2–carbon nanocomposites using cheap raw materials as anode for lithium ion batteries
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使用廉价原材料大规模合成TiO2-碳纳米复合材料作为锂离子电池阳极

DOI:
10.1016/j.jallcom.2014.07.167
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发表时间:
2014-12
影响因子:
6.2
通讯作者:
Yanhua Zhang
Yanhua Zhang
中科院分区:
材料科学2区
文献类型:
--
作者:
Tao Tao;Lijun He;Jin Li;Yanhua Zhang

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以低成本、丰富的天然钛铁矿(FeTiO3)为原料制备纳米tio2 -碳复合材料。本文提出了一种结合几种传统工艺(球磨、高温退火和化学浸出)的新方法。该复合材料是一种球形材料,由纳米tio2颗粒(尺寸范围为5-80 nm)均匀分布在碳(非晶)基体中。在0.01 ~ 3.0 V的放大电位窗口内,用硬币型电池和金属锂对其电化学性能进行了评价。在33.6 mA g−1的电流密度下,获得了722 mA h g−1的高比电荷容量。此外,tio2 -碳纳米复合材料表现出优异的倍率性能,即使在10.8 a g−1的高电流密度下,其比电荷容量仍为41 mA h g−1。
Low cost and abundant natural ilmenite (FeTiO3) is used as raw materials for preparing TiO2–carbon nanocomposites. A new method combining several traditional techniques (ball milling, high-temperature annealing and chemical leaching) is proposed in this paper. The resulting composite is a spherical material, consisting of nanosized TiO2particles (with a size range of 5–80 nm) homogeneously distributed in carbon (amorphous) matrix. Its electrochemical performance is evaluated by using coin-type cells versus metallic lithium in an enlarged potential window of 0.01–3.0 V. A high specific charge capacity of 722 mA h g−1is obtained at a current density of 33.6 mA g−1. Moreover, the TiO2–carbon nanocomposite exhibits excellent rate capability, even at a high current density of 10.8 A g−1, the specific charge capacity is 41 mA h g−1.
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