prodinfo_hq115.qxd

Information
Fluorad™
Lithium (Bis) Trifluoromethanesulfonimide
Battery Electrolyte HQ-115
Introduction
3M™ Fluorad™ lithium (Bis) Trifluoromethanesulfonimide HQ-115 is an electrolytesalt ideal for organic electrolyte-based lithium batteries.
Cyclic voltamogram studies indicate excellent electrochemical stability. The organicion is capable of strong covalent bonding and hence exhibits excellent resistance tothermal degradation. Not only does the strong electron withdrawing power of theCF - groups help to delocalize the charge on the anion, but the presence of the sulfur, oxygen, and nitrogen atoms, can participate in charge dispersal to furtherpromote dissociation. Fluorad battery electrolyte HQ-115 conductivity valuessimilar to those of LiCIO and LiAsF are possible without the attendant stability HQ-115 battery electrolyte has been evaluated in many emerging batterytechnologies with encouraging results. Papers have been published showing itsutility in lithium ion cells, primary and secondary lithium cells using organic liquidelectrolytes and polymer batteries.
Material Description
Properties
Lithium (Bis) trifluoromethanesulfonimide Physical Properties
Properties
at 77°F (25°C) unlessotherwise specified Aluminum, boron, calcium, chloride, fluoride, iron, nickel, potassium, silicon, sodium, sulfate 3M™ Fluorad™ lithium (Bis) trifluoromethanesulfonimide HQ-115 Solubility
The solubility of Fluorad battery electrolyte HQ-115 in various solvents (at 25°C) isgiven below. Solubilities in many of these solvents are excellent, thus making itpossible to use solvent blends to improve electrical conductivity and viscosity.
Solubility
Stability
The thermal stability of Fluorad battery electrolyte HQ-115, as determined bythermogravimetric analysis, indicates good thermal stability to about 375°C.
Independent research has confirmed that the electrochemical stability of HQ-115battery electrolyte is excellent, demonstrating a high anodic limit. Thethermogravimetric plots of typical battery electrolyte salts are shown in Figure 1.
Conductivity
In general, Fluorad battery electrolyte HQ-115 (CF SO ) N Li exhibits conductivity values which, in some solvents, can be up to five times those typically found with3M™ Fluorad™ FC-122 CF SO Li. Figures 2, 3, and 4 illustrate the conductivity of HQ-115 battery electrolyte in typical battery solvents. HQ-115 battery electrolyteexhibits enhanced conductivity in high-ether, low dielectric solvent blends of typescommonly used in lithium batteries. Published literature reports a value of 14.0mS/cm at 25°C for a solution of DIOX:DME:PC in a 5:4:1 ratio.
ercent) 60
eight (P 40
vity (mS/cm) @ 25°C 4
Figure 1. * Thermogravimetric analysis of Li He flow rate was 50 cm3 min-1 andthe temperature was increased at50°C min.
3M™ Fluorad™ lithium (Bis) trifluoromethanesulfonimide HQ-115 Conductivity
propylene carbonate at variousconcentrations Conductivities of LiN(CF SO ) -based non-aqueous electrolytes versus temperature LiN(CFSO )
Electrolyte
Conductivity (mS cm-1)
solvents
at Celsius temperature indicated
4.30 5.72 7.35 9.19 13.13 17.33 21.60 25.43 2.50 3.58 4.81 6.18 9.24 12.47 15.76 18.96 sppt 0.28 0.67 1.21 1.94 2.80 5.12 7.69 10.70 13.86 * Journal of Power Sources 35, 59–82 (1991), “Conductivity of Electrolytes for Rechargeable Lithium Batteries,” Moli Energy (1990) Ltd., 3958 Myrtle Street, Burnaby, BC, V5C 4G2 (Canada) The salt is very hygroscopic and will deliquesce. Before its use in lithium batteriesFluorad battery electrolyte HQ-115 must be dried. Drying at 130–140°C under fullvacuum is usually sufficient to reduce moisture to acceptable levels.
3M™ Fluorad™ lithium (Bis) trifluoromethanesulfonimide HQ-115 Patents
Users of lithium (bis) trifluoromethanesulfonimide are advised that some uses of thisproduct may be covered by U.S. Patent Nos. 5,021,308 and 4,505,997 or the equivalentJapanese or European patents. Potential users should contact 3M regarding a license.
Product Safety and Handling
Please refer to the Material Safety Data Sheet and product label for safety, health, andenvironmental information before using product. Material Safety Data Sheets areavailable from your local 3M representative.
Store at or near room temperature in tightly closed containers to avoid moisture pick-upwhen not in use.
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Call (U.S.) 651 736 7123
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Important Notice to Purchaser: The information in this publication is based on tests that we believe are reliable. Your
results may vary due to differences in test types and conditions. You must evaluate and determine whether the product
is suitable for your intended application. Since conditions of product use are outside of our control and vary widely, the
following is made in lieu of all express or implied warranties (including the warranties of merchantability or fitness for a
particular purpose): Except where prohibited by law, 3M’s only obligation and your only remedy, is replacement or, at
3M's option, refund of the original purchase price of product that is shown to have been defective when you received it.
In no case will 3M be liable for any direct, indirect, special, incidental, or consequential damages (including, without
limitation, lost profits, goodwill, and business opportunity) based on breach of warranty, condition or contract,
negligence, strict tort, or any other legal or equitable theory.
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