03-08-2017 дата публикации
Номер: US20170222266A1
Принадлежит:
The present disclosure provides an ionic liquid and a preparation method thereof, in particular, the present disclosure provides an ionic liquid whose halogen anions content and moisture content are low, and a method for preparing the same. The total content of halogen anions in the ionic liquid is less than 10 ppm, and moisture content in the ionic liquid is less than 50 ppm. The ionic liquid prepared by the method of the present disclosure is suitable for electrochemical systems which have high requirements for moisture content, such as lithium ion secondary batteries and electrochemical supercapacitors. 1. An ionic liquid , wherein a total content of halogen anions in the ionic liquid is less than 10 ppm , and moisture content in the ionic liquid is less than 50 ppm; the halogen anions are Cl , Br and I.2. The ionic liquid of claim 1 , wherein the total content of halogen anions in the ionic liquid is less than 5 ppm.5. A preparation method of the ionic liquid as described in claim 1 , comprising the following steps: [{'br': None, 'sub': 4', '5', '6', '1', '2', '3', '4', '5', '6', '1', '2', '3, 'sup': +', '−', '+', '−, 'QQQN+[QQQNH]A→[QQQNH]A+QQQN\u2003\u2003(a); or'}, {'br': None, 'sub': 4', '5', '6', '1', '2', '3', '4', '5', '6', '1', '2', '3, 'sup': +', '−', '+', '−, 'QQQP+[QQQPH]A→[QQQPH]A+QQQP\u2003\u2003(b); or'}, {'br': None, 'sub': 4', '5', '6', '1', '2', '3', '4', '5', '6', '1', '2', '3, 'sup': +', '−', '+', '−, 'QQQN+[QQQPH]A→[QQQNH]A+QQQP\u2003\u2003(c); or'}, {'br': None, 'sub': 4', '5', '6', '1', '2', '3', '4', '5', '6', '1', '2', '3, 'sup': +', '−', '+', '−, 'QQQP+[QQQNH]A→[QQQPH]A+QQQN\u2003\u2003(d);'}], 'Step 1: preparing an ammonium salt or a phosphonium salt, reaction equations as below [{'br': None, 'sub': 4', '5', '6', '3', '4', '5', '6', '2, 'sup': +', '−', '+', '−, '[QQQNH]A+RCOR′→[QQQNR]A+R′OH+CO; or'}, {'br': None, 'sub': 4', '5', '6', '3', '4', '5', '6', '2, 'sup': +', '−', '+', '−, '[QQQPH]A+RCOR′→[QQQPR]A+R′OH+CO;'}], 'Step 2: the ...
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