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Lithium bis(trifluoromethanesulfonyl)imide
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<p>Lithium bis(trifluoromethanesulfonyl)imide, often simply referred to as LiTFSI, is a <a href="/facts/Hydrophilic/k8p95WYu">hydrophilic</a> salt with the chemical formula LiC2F6NO4S2. It is commonly used as Li-ion source in <a href="/facts/Electrolytes/4YE8bIVa">electrolytes</a> for Li-ion batteries as a safer alternative to commonly used <a href="/facts/Lithium_hexafluorophosphate/o6Nc0s9Q">lithium hexafluorophosphate</a>. It is made up of one Li cation and a <a href="/facts/Bistriflimide/mj6yj8Sc">bistriflimide</a> anion. </p><p>Because of its very high solubility in water (> 21 <a href="/facts/Molality/Saa8Jj8w">m</a>), LiTFSI has been used as lithium salt in water-in-salt electrolytes for <a href="/facts/Aqueous_lithium-ion_battery/rxrWrfF9">aqueous lithium-ion batteries</a>. </p>