LITHIUM BISFLUOROSULFONYLIMIDE COMPOSITION

• Main Authors: ITAYAMA NAOHIKO, KATSUYAMA HIROMOTO, MIZUNO HIROYUKI
• Format: Patent
• Language: English; Korean
• Published: 05.06.2019
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The present invention is to provide a composition which is difficult to cause clogging of a filter when using a solution, thereby being able to filter the solution in a short time. Specifically, the present invention relates to the composition containing bis(fluorosulfonyl)imide and impurities that the composition is manufactured by dissolving in a mixed solvent in which ethylene carbonate and ethyl methyl carbonate are mixed at a volume ratio of 3:7 to prepare a solution having a 1M concentration of lithium bis(fluorosulfonyl) imide of and when pressure-filtering 50 mL of the solution in a pressure of 0.1 MPa by using a membrane filter having 0.2 μm of a pore size and 47mmφ of a filtration area, insoluble partices which have 5 to 150μm of an average particle diameter remain on the membrane filter. 본 발명은 용액으로 했을 때에 필터의 눈막힘을 일으키기 어려워, 단시간에 용액을 여과할 수 있는 조성물을 제공하는 것이다. 리튬 비스(플루오로술포닐)이미드와 불순물을 함유하는 조성물로서, 당해 조성물을, 에틸렌카보네이트와 에틸메틸카보네이트를 3:7의 체적비로 혼합한 혼합 용매에 용해하여 리튬 비스(플루오로술포닐)이미드의 농도가 1M인 용액을 조제하고, 당해 용액 50mL를 구멍지름 0.2㎛ 및 여과 면적 47mmφ의 멤브레인 필터를 이용하여 0.1MPa의 압력으로 가압 여과하면, 5∼150㎛의 평균입경을 갖는 불용성 입자가 상기 멤브레인 필터 상에 잔류하는 조성물이다.