DataVXAdvanced MaterialsPaper
journal article·2023-07

Achieving Practical High‐Energy‐Density Lithium‐Metal Batteries by a Dual‐Anion Regulated Electrolyte

Hai Su, Zifeng Chen, Mengjie Li, Panxing Bai, Yong Li, Xiao Ji, Ziqiang Liu, Jie Sun, Jia Ding, Ming Yang, Xiayin Yao, Chong Mao, Yunhua Xu

Advanced Materials· Volume 35· Issue 29
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Source abstract

Abstract

Abstract Lithium‐metal batteries (LMBs) using lithium‐metal anodes and high‐voltage cathodes have been deemed as one of the most promising high‐energy‐density battery technology. However, its practical application is largely hindered by the notorious dendrite growth of lithium‐metal anodes, the fast structure degradation of the cathode, and insufficient electrode–electrolyte interphase kinetics. Here, a dual‐anion regulated electrolyte is developed for LMBs using lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) and lithium difluoro(bisoxalato)phosphate (LiDFBOP) as anion regulators. The incorporation of TFSI− in the solvation sheath reduces the desolvation energy of Li+, and DFBOP− promotes the formation of highly ion‐conductive and sustainable inorganic‐rich interphases on the electrodes. Significantly enhanced performance is demonstrated on Li||LiNi0.83Co0.11Mn0.06O2 pouch cells, with 84.6% capacity retention after 150 cycles in 6.0 Ah pouch cells and an ultrahigh rate capability up to 5 C in 2.0 Ah pouch cells. Furthermore, a pouch cell with an ultralarge capacity of 39.0 Ah is fabricated and achieves an ultrahigh energy density of 521.3 Wh kg−1. The findings provide a facile electrolyte design strategy for promoting the practical utilization of high‐energy‐density LMBs.
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Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) and Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin 300072 P. R. China

State Key Laboratory of Space Power‐Sources Technology Shanghai Institute of Space Power Sources Shanghai 200245 P. R. China

School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 P. R. China

Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China

School of Chemical Engineering and Technology Key Laboratory for Green Chemical Technology of Ministry of Education Tianjin University Tianjin 300072 P. R. China

National Key Laboratory of Science and Technology on Power Sources Tianjin Institute of Power Sources Tianjin 300384 P. R. China

Zhuhai Smoothway Electronic Materials Co., Ltd Zhuhai 519110 P. R. China

Funding

National Key Research and Development Program of China

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