Textile-Type Lithium-Ion Battery Cathode Enabling High Specific/Areal Capacities and High Rate Capability through Ligand Replacement Reaction-Mediated Assembly,Advanced Energy Materials

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Textile-Type Lithium-Ion Battery Cathode Enabling High Specific/Areal Capacities and High Rate Capability through Ligand Replacement Reaction-Mediated Assembly
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2021-07-16 , DOI: 10.1002/aenm.202101631
Minseong Kwon ₁ , Donghyeon Nam ₁ , Seokmin Lee ₁ , Yongju Kim ₂ , Bongjun Yeom ₃ , Jun Hyuk Moon ₄ , Seung Woo Lee ₅ , Yongmin Ko ₆ , Jinhan Cho _{1,

2}

Affiliation

Achieving high energy storage performance and fast rate capability at the same time is one of the most critical challenges in battery technology. Here, a high-performance textile cathode with notable specific/areal capacities and high rate capability through an interfacial interaction-mediated assembly that can directly bridge all interfaces existing between textile and conductive materials and between conductive and active materials, minimizing unnecessary insulating organics is reported. First, amine (NH₂)- and carboxylic acid (COOH)-functionalized multiwalled carbon nanotubes (MWNTs) are alternately layer-by-layer (LbL)-assembled onto cellulose textiles for the preparation of conductive textiles using hydrogen bonding interactions. Dioleamide-stabilized LiFePO₄ nanoparticles (DA-LFP NPs) with high crystallinity and high dispersion stability in organic media are consecutively LbL-assembled with MWNT-NH₂ onto conductive textiles through ligand replacement between native DA ligands bound to the surface of the LFP NPs and NH₂ groups of MWNTs. In this case, 35 nm sized LFP NPs are densely and uniformly adsorbed onto all regions of the textile, and additionally, their areal capacities are increased according to the deposition number without a significant loss of charge transfer kinetics. The formed textile cathodes exhibit remarkable specific/areal capacities (196 mAh g⁻¹/8.3 mAh cm⁻² at 0.1 C) and high rate capability with highly flexible mechanical properties.

中文翻译：

通过配体置换反应介导的组装实现高比/面积容量和高倍率能力的纺织型锂离子电池阴极

同时实现高储能性能和快速速率能力是电池技术中最关键的挑战之一。在这里，一种高性能纺织阴极具有显着的比/面积容量和高倍率能力，通过界面相互作用介导的组装，可以直接桥接纺织品和导电材料之间以及导电和活性材料之间存在的所有界面，最大限度地减少不必要的绝缘有机物. 首先，胺 (NH ₂ )- 和羧酸 (COOH) 官能化的多壁碳纳米管 (MWNT) 交替地逐层 (LbL) 组装到纤维素纺织品上，以使用氢键相互作用制备导电纺织品。二油酰胺稳定的 LiFePO ₄纳米颗粒（DA-LFP NPS）具有高结晶度和高的分散稳定性在有机介质中是连续的LbL组装与MWNT-NH ₂通过天然DA之间的配体置换到导电纺织品的配体结合到LFP的NP和NH的表面_2个基团的MWNT。在这种情况下，35 nm 大小的 LFP NPs 密集且均匀地吸附到纺织品的所有区域，此外，它们的面积容量根据沉积数量增加，而电荷转移动力学没有显着损失。形成的纺织阴极表现出显着的比/面积容量（196 mAh g ^-1 /8.3 mAh cm ^-2在0.1 C）和高倍率性能以及高度灵活的机械性能。

更新日期：2021-09-23

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