@article{0c1b68d009034229b3d806448d9352b9,
title = "Dual-salt-additive electrolyte enables high-voltage lithium metal full batteries capable of fast-charging ability",
abstract = "Rechargeable batteries using lithium metal anode and Ni-rich cathode are considered promising because of their high energy densities. However, battery failure associated with lithium dendrite growth and cathode structure degradation strongly hinders their practical use, especially during high voltage or fast charge operations. Here, we report an advanced carbonate-based electrolyte consisting of the lithium tetrafluoroborate (LiBF4) and lithium nitrate (LiNO3) dual-salt additives via solvation structure manipulation. We find the LiBF4 additive can not only improve the stability of the high-voltage NCM811 cathode, but also play a role in assisting the dissolution of LiNO3 in carbonate electrolytes via its Lewis acidity. We reveal that the unique dual-salt-additive chemistry can effect synergistically to establish robust and highly conductive solid electrolyte interphases on both anode and cathode, which enables chunky lithium metal deposition and favors the structure stability of LiNi0.8Co0.1Mn0.1O2 (NCM811) under 4.4 V. The resulting fast interfacial kinetics significantly decreases the electrode overpotential and brings the ultrahigh capacity delivery of 185.6 mAh g−1 at 5 C charge rate (~10 mA cm−2). The full battery shows the 80.3% capacity retention even after 250 cycles with thin Li anode (45 µm) and high-loading NCM811cathode (2.4 mAh cm−2).",
keywords = "Dual-salt-additive electrolyte, High-Ni cathode, Li metal full battery, LiNO, Solid electrolyte interphase",
author = "Xinyang Wang and Siyuan Li and Weidong Zhang and Duo Wang and Zeyu Shen and Jieping Zheng and Zhuang, {Houlong L.} and Yi He and Yingying Lu",
note = "Funding Information: We acknowledge financial support from the National Key Research and Development Program of China ( 2018YFA0209600 ), the Natural Science Foundation of China ( 22022813 , 21878268 ), and the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang ( 2019R01006 ). D. Wang and Prof. H. L. Zhuang thank the start-up funds from Arizona State University. This research also used the computational resources of the Agave computer cluster at Arizona State University. The authors thank Na Zheng and Sudan Shen from College of Chemical and Biological Engineering, Zhejiang University for SEM test. The authors thank Lingyun Wu (Cryo-Electron Microscopy, Zhejiang University) for her assistance on cryo-TEM. The authors also thank Yangfan Lu (School of Materials Science and Engineering, Zhejiang University) for her assistance on XPS. Funding Information: We acknowledge financial support from the National Key Research and Development Program of China (2018YFA0209600), the Natural Science Foundation of China (22022813, 21878268), and the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang (2019R01006). D. Wang and Prof. H. L. Zhuang thank the start-up funds from Arizona State University. This research also used the computational resources of the Agave computer cluster at Arizona State University. The authors thank Na Zheng and Sudan Shen from College of Chemical and Biological Engineering, Zhejiang University for SEM test. The authors thank Lingyun Wu (Cryo-Electron Microscopy, Zhejiang University) for her assistance on cryo-TEM. The authors also thank Yangfan Lu (School of Materials Science and Engineering, Zhejiang University) for her assistance on XPS. Publisher Copyright: {\textcopyright} 2021",
year = "2021",
month = nov,
doi = "10.1016/j.nanoen.2021.106353",
language = "English (US)",
volume = "89",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier BV",
}