Single-Ion Conducting Multi-block Copolymer Electrolyte for Lithium-Metal Batteries with High Mass Loading NCM811 Cathodes

IF 19.3 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Xu Dong, Alexander Mayer, Xu Liu, Stefano Passerini* and Dominic Bresser*, 
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引用次数: 11

Abstract

Lithium-metal batteries comprising a single-ion conducting polymer electrolyte and a nickel-rich LiNi1-x-yCoxMnyO2 (NCM) positive electrode (cathode) potentially offer very high energy density and great safety. However, such cell chemistry is very demanding concerning the required interfacial stability of the polymer electrolyte, and the realization of high mass loading cathodes remains a great challenge. Herein, the development of a new single-ion conducting multi-block copolymer electrolyte including trifluoromethyl groups in the ionophilic block is reported. After ethylene carbonate (EC) is incorporated into the self-standing and easily processable polymer membranes, high ionic conductivity along with very high limiting current density and suitable anodic stability are obtained. These enable stable cycling of Li∥NCM811 cells─also at high C rates (up to 5C) and active material mass loadings of the NCM811 cathode of >10 mg cm–2, which are both key steps toward the potential commercialization of this class of electrolytes.

Abstract Image

高质量负极NCM811锂金属电池的单离子导电多嵌段共聚物电解质
锂金属电池由单离子导电聚合物电解质和富含镍的LiNi1-x-yCoxMnyO2 (NCM)正极(阴极)组成,可能提供非常高的能量密度和极高的安全性。然而,这种电池化学对聚合物电解质的界面稳定性要求很高,实现高质量负载阴极仍然是一个巨大的挑战。本文报道了一种新型的单离子导电多嵌段共聚物电解质,其亲离子嵌段中含有三氟甲基。将碳酸乙烯(EC)掺入易加工的聚合物膜中,可获得高离子电导率、极高的极限电流密度和良好的阳极稳定性。这使得Li∥NCM811电池能够在高C率(高达5C)下稳定循环,并且NCM811阴极的活性物质质量负载为10 mg cm-2,这是该类电解质潜在商业化的关键步骤。
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来源期刊
ACS Energy Letters
ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment
CiteScore
31.20
自引率
5.00%
发文量
469
审稿时长
1 months
期刊介绍: ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.
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