单宁酸/铁(III)金属酚网络涂层改善镍锰钴氧化物阴极的储能性能和寿命

IF 19 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Donghyuck Park, Subin Shin, Peter C. Sherrell, Binayak Roy, Kimberley L. Callaghan, Frank Caruso, Amanda V. Ellis
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引用次数: 0

摘要

表面涂层锂离子电池阴极是一种很有前途的提高性能和减轻阴极退化的策略。迄今为止所研究的涂层主要集中在电子或离子导电层上,它们被引入来增强阴极颗粒的氧化还原反应,或者基于氧化物的物理保护层来限制表面降解。这种涂层需要高温,耗时的合成过程,以及这些涂层与锂离子之间特定相互作用的不确定性。在这里,金属酚醛网络涂层LiNi0.6Mn0.2Co0.2O2 (NMC)阴极,使用自然产生的多酚通过快速一步组装,提高阴极电化学性能。锂离子与涂层之间的相互作用增强了锂离子向阴极的输运,从而提高了性能。在半电池1C速率循环条件下,与未涂覆阴极相比,改性阴极的过电位降低了20%,界面电阻降低了54%。在全电池形式下,改进后的阴极在恒流循环下容量增加10%,寿命增加54%;此外,恒流-恒压(CCCV)循环的容量增加了5%,寿命延长了25%。这项工作为通过环保锂离子吸引策略改进阴极材料铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Improving Energy Storage and Nickel Manganese Cobalt Oxide Cathode Lifetime via a Tannic Acid/Iron (III) Metal Phenolic Network Coating

Improving Energy Storage and Nickel Manganese Cobalt Oxide Cathode Lifetime via a Tannic Acid/Iron (III) Metal Phenolic Network Coating

Improving Energy Storage and Nickel Manganese Cobalt Oxide Cathode Lifetime via a Tannic Acid/Iron (III) Metal Phenolic Network Coating

Improving Energy Storage and Nickel Manganese Cobalt Oxide Cathode Lifetime via a Tannic Acid/Iron (III) Metal Phenolic Network Coating

Improving Energy Storage and Nickel Manganese Cobalt Oxide Cathode Lifetime via a Tannic Acid/Iron (III) Metal Phenolic Network Coating

Improving Energy Storage and Nickel Manganese Cobalt Oxide Cathode Lifetime via a Tannic Acid/Iron (III) Metal Phenolic Network Coating

Surface coating lithium-ion battery cathodes is a promising strategy to improve performance and mitigate cathode degradation. The coatings studied to date focus on either electronically or ionically conducting layers, which have been introduced to enhance the redox reactions of cathode particles, or oxide-based physical protection layers limiting surface degradation. Such coatings require high-temperature, time-consuming synthesis processes, along with uncertainty in the specific interactions between these coatings and lithium ions. Here, metal-phenolic network coated LiNi0.6Mn0.2Co0.2O2 (NMC) cathodes are, produced using naturally occurring polyphenols via a rapid one-step assembly, improve cathode electrochemical performance. The performance improvement arises from the interaction between lithium ions and the coated layer, which enhances the lithium-ion transport to the cathode. In half-cell 1C rate cycling conditions, the modified cathode displays a 20% reduction in overpotential and a 54% decrease in interfacial resistance compared to the uncoated cathode. In a full-cell format, the modified cathode exhibits a 10% increase in capacity and a 54% increase in lifespan for constant current cycling; in addition to a 5% increase in capacity and a 25% increase in lifespan for constant current-constant voltage (CCCV) cycling. This work paves the way for improving cathode materials via eco-friendly lithium-ion attraction strategies.

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来源期刊
Advanced Functional Materials
Advanced Functional Materials 工程技术-材料科学:综合
CiteScore
29.50
自引率
4.20%
发文量
2086
审稿时长
2.1 months
期刊介绍: Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.
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