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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Sustainable synthetic route for gamma-Fe2O3/C hybrid as anode material for lithium-ion batteries
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Sustainable synthetic route for gamma-Fe2O3/C hybrid as anode material for lithium-ion batteries

机译:γ-Fe2O3/ C杂化物作为锂离子电池负极材料的可持续合成路线

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摘要

A facile, high-yield and sustainable method is developed to synthesize iron oxide/C hybrids. Starch is chosen as the carbon source due to its superior gelatinization property and natural abundance, and ferric nitrate is used as the iron salt for the sustainable synthesis. The iron oxide in the final products exists in the gamma-Fe2O3 phase. The gamma-Fe2O3/C hybrids are used as anode materials for lithium-ion batteries. The batteries exhibit better cyclability as the content of gamma-Fe2O3 decreases, but in turn the reversible capacity declines. The gamma-Fe2O3/C hybrid with 63.96 wt% of gamma-Fe2O3 has an initial discharge capacity of 1149 mA h g(-1) and after the 80th cycle the reversible capacity is maintained at over 720 mA h g(-1) at a current density of 0.5 A g(-1). Even when tested at a current density of 5 A g(-1), a substantial discharge capacity of similar to 300 mA h g(-1) can be obtained.
机译:开发了一种简便,高产且可持续的方法来合成氧化铁/ C杂化物。淀粉因其出色的糊化特性和自然丰度而被选作碳源,而硝酸铁被用作可持续合成的铁盐。最终产物中的氧化铁以γ-Fe2O3相存在。 γ-Fe2O3/ C杂化物用作锂离子电池的负极材料。随着γ-Fe2O3含量的减少,电池表现出更好的可循环性,但可逆容量随之下降。具有63.96 wt%的gamma-Fe2O3的gamma-Fe2O3 / C杂化物的初始放电容量为1149 mA hg(-1),在第80个循环后,电流下可逆容量保持在720 mA hg(-1)以上密度为0.5 A g(-1)。即使在5 A g(-1)的电流密度下进行测试,也可以获得与300 mA h g(-1)相似的基本放电容量。

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