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Electrospun Fe2TiO5–TiO2@Graphene Nanofibers as Highly Durable Insertion Anode with Enhanced Lithium Storage Properties
Energy Technology ( IF 3.6 ) Pub Date : 2020-04-23 , DOI: 10.1002/ente.202000215 Hao Liu 1, 2 , Zhengping Li 1, 2 , Haiyan Sun 1, 2 , Qifang Lu 1, 2
Energy Technology ( IF 3.6 ) Pub Date : 2020-04-23 , DOI: 10.1002/ente.202000215 Hao Liu 1, 2 , Zhengping Li 1, 2 , Haiyan Sun 1, 2 , Qifang Lu 1, 2
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Iron titanate is of considerable interest as a potential anode material for electrochemical energy storage and conversion. Herein, a fiber‐like Fe2TiO5–TiO2@graphene (rGO–FTO–TO) hybrid structure is rationally designed and delicately fabricated by anchoring reduced graphene oxide (rGO) nanosheets on Fe2TiO5–TiO2 (FTO–TO) nanofibers. The effective wrapping of rGO nanosheets can greatly improve the electrical conductivity and reduce the volume expansion. When evaluated as an anode, the rGO–FTO–TO exhibits remarkable lithium storage properties in terms of high capacity, long‐term cycling stability, and excellent rate capability. Moreover, there exists a strong electrostatic interaction between rGO nanosheets and FTO–TO nanofibers by the introduction of aminopropyltriethoxysilane to induce the immobilization of a positively charged NH3+ group on the FTO–TO surface, promoting the bonding with negatively charged carboxylic acid (COO−) and hydroxyl (OH) groups on the rGO. With strong electrostatic interaction, the rGO–FTO–TO exhibits appreciably enhanced initial capacity, elevated capacity retention, and high columbic efficiency compared with those of pristine FTO–TO nanofibers. This work provides a feasible strategy for fabricating a graphene‐encapsulated FTO–TO fiber‐like composite as a promising high‐performance anode for lithium‐ion batteries.
中文翻译：
Fe2TiO5-TiO2 @石墨烯纳米电纺丝作为具有增强的锂存储性能的高度耐用的插入阳极
钛酸铁作为用于电化学能量存储和转化的潜在阳极材料备受关注。在此，纤维状的Fe 2的TiO 5 -TiO 2 @graphene（RGO-FTO-TO）的混合结构设计合理并通过微妙（RG0）对Fe锚固还原氧化石墨烯纳米片制造2的TiO 5 -TiO 2（FTO-TO）纳米纤维。rGO纳米片的有效包裹可以大大提高电导率并减少体积膨胀。当评估为阳极时，rGO–FTO–TO在高容量，长期循环稳定性和出色的倍率性能方面均表现出卓越的锂存储性能。此外，存在通过引入氨基丙基三乙氧基RGO纳米片和FTO-TO纳米纤维之间的强的静电相互作用以诱导正电荷的固定 NH 3 +的FTO-TO表面上基团，促进与带负电荷的羧酸的接合（ COO - ）和羟基（OH）上的团体。与原始的FTO-TO纳米纤维相比，rGO-FTO-TO具有强的静电相互作用，其初始容量，容量保持率提高和高柱效显着提高。这项工作为制造石墨烯封装的FTO-TO纤维状复合材料作为锂离子电池的有希望的高性能阳极提供了可行的策略。
更新日期：2020-07-02
中文翻译：
Fe2TiO5-TiO2 @石墨烯纳米电纺丝作为具有增强的锂存储性能的高度耐用的插入阳极
钛酸铁作为用于电化学能量存储和转化的潜在阳极材料备受关注。在此，纤维状的Fe 2的TiO 5 -TiO 2 @graphene（RGO-FTO-TO）的混合结构设计合理并通过微妙（RG0）对Fe锚固还原氧化石墨烯纳米片制造2的TiO 5 -TiO 2（FTO-TO）纳米纤维。rGO纳米片的有效包裹可以大大提高电导率并减少体积膨胀。当评估为阳极时，rGO–FTO–TO在高容量，长期循环稳定性和出色的倍率性能方面均表现出卓越的锂存储性能。此外，存在通过引入氨基丙基三乙氧基RGO纳米片和FTO-TO纳米纤维之间的强的静电相互作用以诱导正电荷的固定 NH 3 +的FTO-TO表面上基团，促进与带负电荷的羧酸的接合（ COO - ）和羟基（OH）上的团体。与原始的FTO-TO纳米纤维相比，rGO-FTO-TO具有强的静电相互作用，其初始容量，容量保持率提高和高柱效显着提高。这项工作为制造石墨烯封装的FTO-TO纤维状复合材料作为锂离子电池的有希望的高性能阳极提供了可行的策略。
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