Electrolyte using blend salts of LiTFSI and LLZO for long-term high-safety lithium ion battery |
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| Affiliation: | 1. School of Aviation and Transportation, Jiangsu College of Engineering and Technology, Nantong, 226007, China;2. School of Physics and Electronic Information Engineering, Qinghai Nationalities University, Xining, 810007, China;1. Inorganic Materials Research Laboratory, Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria;2. Computational and Bio-Simulation Research Group, University of Calabar, Calabar, P.M.B 1115, Nigeria;1. Department of Mathematics, College of Engineering and Technology, Srinivas University, Mangalore, 574146, India;2. Department of Mathematics, Bapuji Institute of Engineering & Technology, Davanagere, 577004, India;3. Department of Computer Science & Engineering, Bapuji Institute of Engineering & Technology, Davanagere, 577004, India;4. Department of Chemistry, College of Engineering and Technology, Srinivas University, Mangalore, 574146, India;1. Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran;2. Department of Chemistry, Quchan Branch, Islamic Azad University, Quchan, Iran |
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| Abstract: | It is crucial to obtain a reliable electrolyte system that is used for replacing thermally unstable and the moisture sensitive LiPF6 salt in liquid electrolytes for developing excellent cycle stability lithium ion batteries with high safety. In this work, a kind of hybrid electrolytes, adding Ga–Bi co-doped Li7La3Zr2O12 (LLZO) into LiTFSI based commercial electrolyte, was successfully prepared. The results shows that adding Ga–Bi co-doped LLZO ceramic particles is benefit for enhancing conductivity of LiTFSI based commercial electrolyte, which is 3.14 mS cm−1 from 3.02 mS cm−1. Furthermore, the LiFePO4| |Li cell assembling with LiTFSI based electrolyte with Ga–Bi co-doped LLZO ceramic particles shows good cycle performance and coulomb efficiency (100% except for the initial cycle value of 88%) due to a passivation multi-element film formed for preventing severe corrosion to the Al foil. The battery delivered a high first cycle discharge capacity of 144.2 mAh g−1 (85% of theoretical LiFePO4.) and a maximum value of 152.6 mAh g−1 after the 69th cycle. After the 300 stable cycle, the capacity of 130.8 mAh g−1 (85.7% of the maximum data) remained. |
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| Keywords: | Lithium-ion battery Electrolyte Blend salts LLZO |
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