A Flexible Multifunctional Cyanoethyl-Modified Bacterial Cellulose Nanofiber Framework for High-Energy and High-Power Density Aqueous Li-Ion Batteries,Small

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A Flexible Multifunctional Cyanoethyl-Modified Bacterial Cellulose Nanofiber Framework for High-Energy and High-Power Density Aqueous Li-Ion Batteries
Small ( IF 13.0 ) Pub Date : 2024-09-09 , DOI: 10.1002/smll.202404452
Long Zhang ₁ , Tao Ma ₁ , Peng-Hu Zhou ₁ , Yi-Wen Yang ₁ , Lei-L Lu ₁ , Bi-Cheng Hu ₁ , Shu-Hong Yu _{1,

2}

Affiliation

Aqueous rechargeable lithium-ion batteries (ARLIBs) are extensively researched due to their inherent safety, typical affordability, and potential high energy density. However, fabricating ARLIBs with both high energy density and power performance remains challenging. Herein, based on cyanoethyl-modified bacterial cellulose nanofibers (CBCNs), a multifunctional fast ion transport framework is developed to construct the flexible free-standing ARLIBs with high areal loading and excellent rate performance. Benefiting from the unique merits of CBCNs, such as ultra-high aspect ratio, excellent toughness, superior adhesion, good lithiophilicity and ideal stability, the flexible free-standing and highly robust electrodes are fabricated and exhibit a long-term stable cycling of 1200 cycles with a high specific capacity of 117 mAh∙g⁻¹ at 15 C. Remarkably, the corresponding full cell with the free-standing high mass loading (45.5 mg∙cm⁻²) electrodes under the condition of ultra-low addition of battery binder demonstrates a cycle lifespan of over 1000 cycles with a specific capacity of 120 mAh∙g⁻¹ and a capacity decay as low as 0.03% per cycle, which is far superior to those of almost all previous reports. This work provides a strategy for constructing ARLIBs with high energy density and power performance by introducing a unique fast ion transport nanofiber framework.

中文翻译：

一种用于高能量、高功率密度水性锂离子电池的柔性多功能氰乙基改性细菌纤维素纳米纤维框架

水系可充电锂离子电池（ARLIB）因其固有的安全性、典型的可负担性和潜在的高能量密度而被广泛研究。然而，制造具有高能量密度和功率性能的 ARLIB 仍然具有挑战性。在此，基于氰乙基改性的细菌纤维素纳米纤维（CBCNs），开发了一种多功能快速离子传输框架，以构建具有高面负载和优异倍率性能的柔性独立式 ARLIBs。得益于 CBCN 的独特优点，例如超高纵横比、优异的韧性、卓越的附着力、良好的亲锂性和理想的稳定性，制造了柔性独立且高度坚固的电极，并在 15 C 下表现出 1200 次循环的长期稳定循环和 117 mAh∙^g-1 的高比容量。值得注意的是，相应的全电池具有独立的高质量负载（45.5 mg∙^cm-2）电极在超低电池粘合剂添加量的条件下表现出超过 1000 次循环的循环寿命，比容量为 120 mAh∙g⁻¹，每次循环容量衰减低至 0.03%，远优于以往几乎所有的报道。这项工作通过引入独特的快速离子传输纳米纤维框架，为构建具有高能量密度和功率性能的 ARLIB 提供了一种策略。

更新日期：2024-09-09

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