Forums > General Discussion > What are the lithium battery electrolytes?
| What are the lithium battery electrolytes? | |
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| Posted: 05 Jul 2022 04:53 UTC | Post #1 |
| winshinepower Deck & Engine |
Registered Total Posts: 8 |
| Several typical lithium battery electrolytes Anhydr ous lithium hexafluorophosphate LiPF6 (Lithium Hexafluorophosphate) lithium battery electrolyte With a molecular weight of 151.9, this lithium battery electrolyte is white crystal or powder in appearance, easily soluble in water, and also soluble in low-concentration methanol, ethanol, propanol, carbonate, and other organic solvents. Decomposes when exposed to air or heated. Lithi um Tetrafluoroborate LiBF4 (Lithium Tetrafluoroborate) The molecular weight of this lithium battery is 93.74. The appearance of this lithium battery electrolyte is white to gray crystalline or crystalline powder, which is hygroscopic. Due to the small radius of BF4, it is easy to associate, and the conductivity of the electrolyte is small, so it is rarely used. The electrochemical performance of LiBF 4 is better than that of LiPF 6 at high temperature and low temperature. Lith ium trifluoromethanesulf onate LiFSi (Lithium trifluoromethanesulf onate) lithium battery electrolyte The molecular weight of this lithium battery is 156.01, the appearance of this lithium battery electrolyte is a white powder, generally has a large radius, the charge distribution is relatively dispersed, and the electron delocalization effect is strong, which can reduce the lattice energy of the lithium salt and weaken the interaction between positive and negative ions. The interaction increases the solubility, and also contributes to the improvement of thermal stability and electrochemical performance. But they all corrode the aluminum current collectors under certain voltage conditions, thus limiting their use. Lithium diacetate borate LiBOB (Lithiumbis(oxalate) borate) lithium battery electrolyte The molecular weight of this lithium battery is 193.79. The appearance of this lithium battery electrolyte is a yellowish or white powder. The boron atom in LiBOB is connected with the oxygen atom in oxalate with a strong electron-withdrawing ability, and the charge distribution is relatively dispersed, which makes it electrochemical stable. Compared with IPPF 6 , LiBOB has lower irreversible capacity during the first charge-discharge process and has superior cycle performance at a high temperature of 50 °C. The formed passivation film is more conducive to inhibiting the exfoliation of graphite. lithium battery：https://ww w.winshinepower.com/ Energy-Storage | |
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