Nan Qin, Jing Chen, Yanyan Lu, Yifan Li, Wenlong Cai, Jiantao Li, Cunman Zhang, Zonghai Chen, Jim P. Zheng, Liming Jin
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引用次数: 0
Abstract
Lithium-ion batteries (LIBs) with electrolytes containing lithium tetrafluoroborate (LiBF4) can achieve large capacity retention under low temperature, but the accompanying rapid capacity decay inhibits commercialization. Here, the impact of LiBF4 as a supplemental salt to LiPF6 is systematically investigated using low ethylene carbonate (EC)-content electrolytes, along with a low-melting-point cosolvent. It is found that rational adjustment of the amount of LiBF4 could not only regulate the interactions of anions and solvents in Li+ solvation sheaths but also tune the composition and morphology of solid electrolyte interphase (SEI). It is worth noting that electrolytes with trace amount of LiBF4 (0.05 M) show synergetic interaction between PF6– and Li+ and decreased interaction between EC and Li+, achieving a dense and LiF-rich SEI, which enables a 200 mAh pouch cell with less gas generation, long-lived cycling, and higher low-temperature capacity, simultaneously. This work provides new insight into utilizing trace LiBF4 for stable interface construction of durable low-temperature LIBs.
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.