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Low Temperature Nanotailoring of Hydrated Compound by Alcohols: FeF3·3H2O as an Example. Preparation of Nanosized FeF3·0.33H2O Cathode Material for Li-Ion Batteries
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-05-09 00:00:00 , DOI: 10.1021/acs.inorgchem.9b00054 Haochen Zhou 1 , Hongxu Sun 1 , Tao Wang 2 , Yuning Gao 1 , Jing Ding 1 , Zhanglin Xu 1 , Jingjing Tang 1 , Ming Jia 1 , Juan Yang 1 , Jian Zhu 2
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-05-09 00:00:00 , DOI: 10.1021/acs.inorgchem.9b00054 Haochen Zhou 1 , Hongxu Sun 1 , Tao Wang 2 , Yuning Gao 1 , Jing Ding 1 , Zhanglin Xu 1 , Jingjing Tang 1 , Ming Jia 1 , Juan Yang 1 , Jian Zhu 2
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Iron fluoride is a kind of high-capacity conversion-type cathode material for lithium-ion batteries (LIBs) and shows attractive practical application potential. However, it still faces many challenges, such as poor electronic conductivity and volume change while cycling. Reducing particle size to nanoscale has been proved to be an effective way to address the poor electronic conductivity and huge volume change of iron fluoride cathodes for LIBs. In this study, a low temperature nanotailoring (LTNT) strategy is proposed to realize the conversion of microsized FeF3·3H2O to nanosized FeF3·0.33H2O by one-step treating with the assistance of alcohols. Meanwhile, the particle size and morphology of iron fluorides can be controlled by regulating the processing conditions. When evaluated as a cathode material for LIBs, the as-prepared bare FeF3·0.33H2O shows a high capacity of 190 mAh g–1 after 50 cycles with excellent rate capability. This LTNT method is applicable to hydrates and even can be extended to easily hydrated compounds.
中文翻译：
用醇对水合化合物进行低温纳米定型：以FeF 3 ·3H 2 O为例。锂离子电池纳米FeF 3 ·0.33H 2 O正极材料的制备
氟化铁是一种用于锂离子电池（LIB）的高容量转换型正极材料，并显示出诱人的实际应用潜力。但是，它仍然面临许多挑战，例如不良的电子电导率和循环时的体积变化。事实证明，将粒径减小至纳米级是解决LIB的差的电子电导率和氟化铁阴极体积变化巨大的有效方法。在这项研究中，提出了一种低温纳米裁缝（LTNT）策略，以实现将微米尺寸的FeF 3 ·3H 2 O转化为纳米尺寸的FeF 3 ·0.33H 2。O在酒精的帮助下一步一步处理。同时，可以通过调节加工条件来控制氟化铁的粒径和形态。当评估为LIB的正极材料时，如此制备的裸FeF 3 ·0.33H 2 O在50次循环后显示出190 mAh g –1的高容量，并具有出色的倍率性能。该LTNT方法适用于水合物，甚至可以扩展为易于水合的化合物。
更新日期：2019-05-09
中文翻译：
用醇对水合化合物进行低温纳米定型：以FeF 3 ·3H 2 O为例。锂离子电池纳米FeF 3 ·0.33H 2 O正极材料的制备
氟化铁是一种用于锂离子电池（LIB）的高容量转换型正极材料，并显示出诱人的实际应用潜力。但是，它仍然面临许多挑战，例如不良的电子电导率和循环时的体积变化。事实证明，将粒径减小至纳米级是解决LIB的差的电子电导率和氟化铁阴极体积变化巨大的有效方法。在这项研究中，提出了一种低温纳米裁缝（LTNT）策略，以实现将微米尺寸的FeF 3 ·3H 2 O转化为纳米尺寸的FeF 3 ·0.33H 2。O在酒精的帮助下一步一步处理。同时，可以通过调节加工条件来控制氟化铁的粒径和形态。当评估为LIB的正极材料时，如此制备的裸FeF 3 ·0.33H 2 O在50次循环后显示出190 mAh g –1的高容量，并具有出色的倍率性能。该LTNT方法适用于水合物，甚至可以扩展为易于水合的化合物。
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