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The binary eutectic mixture of lithium bis(fluorosulfonyl)imide (LiFSI) and potassium bis(fluorosulfonyl)imide (KFSI) with a molar ratio of xLiFSI: xKFSI=0.41: 0.59 has been investigated as molten salt electrolyte for natural graphite/LiFePO4 lithium-ion cells at 80°C. The electrochemical performances of the Li/natural graphite, Li/LiFePO4, and natural graphite/LiFePO4 cells using this molten salt...
Molten salts have attracted wide attention as electrolyte for lithium battery due to their nonvolatile and nonflammable features. In this work, the phase diagram of high pure lithium bis(fluorosulfonyl)imide (LiFSI) and KFSI binary system has been measured. This system shows a high transfer number of lithium ion at 85°C and its conductivity reaches to 10 −3 –10 −2 Scm −1 from...
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