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[0004] Organic solvent electrolytes currently used as electrolytes for lithium secondary batteries can operate at low temperatures, but there are problems in stability at high temperatures because volatile or flammable organic solvents are used as electrolyte solutions
Method used
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manufacture example 1
[0082] Production Example 1: Anion (f 3 C) Synthesis
[0083] As a commercially available product, 58.4 mg of compound (2) obtained from ALCATRAZ CHEMICALS (Gujarat, INDIA) and 194 mg of SF 4 The reaction gave 51.6 mg of compound (3). 92.4 mg of compound (3) was reacted with excess potassiumcarbonate and introduced into 93.9 mg of f 3 Potassium salt of C anion (4).
Embodiment 1
[0085] Make the f obtained in Manufacturing Example 1 3 Potassium salt of C anion (4) with equimolar [EMI] + 、[DEME] + 、[Py 13 ] + or [PP 13 ] + The bromide reacts and carries out cation exchange, thus obtains the ionic liquid ([EMI][f] of the present invention as the target 3 C]) or viscous crystals ([DEME][f 3 C], [Py 13 ][f 3 C] or [PP 13 ][f 3 C]).
[0089] Elemental analysis measured value (theoretical value): H 2.99% (2.98%); C 22.71% (22.58%); N 7.58% (7.52%); F 15.36% (15.31%). The ionconductivity at 25°C: 6.2 mS cm -1 . Viscosity at...
Embodiment 2
[0100] Make the f obtained in Manufacturing Example 1 3 Potassium salt of C anion (4) and equimolar [N 6111 ] + , [N 6222 ] + , [N 1111 ] + , [N 2222 ] + 、[Py 12 ] + , [C 4 mim] + , [C 6 mim] + The bromide reacts and carries out cation exchange, thereby obtains the [N of the ionic liquid of the present invention as the target 6111 ][f 3 C], [N 6222 ] + [f 3 C], [N 1111 ][f 3 C], [N 2222 ][f 3 C], [PP 14 ][f 3 C], [Py 12 ][f 3 C], [Py 14 ][f 3 C], [C 1 mim][f 3 C], [C 4 mim][f 3 C], [C 6 mim][f 3 C]. The physical property values of the obtained ionic liquid or viscous crystal are shown below. In addition, the melting point, glass transition temperature, and solid-solid phase transition temperature are shown in Table 1.
[0101] 1)[N 1111 ][f 3 C],
[0102] 1 H NMR (DMSO-d6, 300MHz): δ=3.06(s, 12H); 19 F NMR (DMSO-d6, 283MHz): δ=71.9(s, 3F). Thermal decomposition temperature (when reduced by 10%): 348℃.
[0103] 2)[N 2222 ][f 3 C],
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Abstract
The present invention provides a kind of ionic liquid or flexible viscous crystal, it is the ionic liquid or soft viscous crystal that is made up of anion and cation, wherein, anion contains [C(SO 2 f) 3 ] ‑ , the cation contains + ), N,N‑diethyl‑N‑methyl‑(2‑methoxyethyl) ammonium ([DEME] + ), N-methyl-N-propylpyrrolidinium ([Py 13 ] + ), N‑Methyl‑N‑Propylpiperidinium ([PP 13 ] + ), Tetramethylammonium ([N 1111 ] + ), tetraethylammonium ([N 2222 ] + ), Trimethylhexylammonium ([N 6111 ] + ), triethylhexylammonium ([N 6222 ] + ), N-methyl-N-ethylpyrrolidinium ([Py 12 ] + ), 1‑butyl‑3‑methylimidazolium ([C 4 mim] + ) and 1‑hexyl‑3‑methylimidazolium ([C 6 mim] + ) at least one of the group consisting of.
Description
technical field [0001] The invention relates to an ionic liquid or soft viscous crystal. The invention also relates to a non-aqueous electrolyte for a lithium secondary battery and the lithium secondary battery. Background technique [0002] In lithium secondary batteries, use at low temperatures is emphasized, and the use of ionic liquids as electrolytes has been proposed (Patent Document 1). On the other hand, there is an increasing demand for power generation systems that can be used in disasters such as the Great East Japan Earthquake and other disasters such as photovoltaic power generation and combined heat and power systems, including the storage type lithium secondary batteries for vehicles. Lithium secondary batteries using organic solvents that have been put into practical use generate heat during charge and discharge, and therefore, safety measures are required to prevent them from reaching high temperatures. In particular, recently, the demand for large-capacit...
Claims
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