Invention Grant
- Patent Title: Fluoroalkyl containing salts combined with fluorinated solvents for electrolytes
- Patent Title (中): 含氟烷基盐与电解质的氟化溶剂结合
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Application No.: US13910108Application Date: 2013-06-04
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Publication No.: US09012094B2Publication Date: 2015-04-21
- Inventor: Konstantin Tikhonov , Ka Ki Yip , Tzu-Yuan Lin , Michael Jason Erickson
- Applicant: A123 Systems LLC
- Applicant Address: US MA Waltham
- Assignee: A123 Systems LLC
- Current Assignee: A123 Systems LLC
- Current Assignee Address: US MA Waltham
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Main IPC: H01M6/16
- IPC: H01M6/16 ; H01M10/0569 ; H01M10/0567 ; H01M10/0568 ; H01M10/0525 ; H01M10/052

Abstract:
Provided are electrochemical cells and electrolytes used to build such cells. An electrolyte may include a fluoroalkyl-substituted LiPF6 salt or a fluoroalkyl-substituted LiBF4 salt. In some embodiments, at least one fluorinated alkyl of the salt has a chain length of from 1 to 8 or, more specifically, between about 2 and 8. These fluorinated alkyl groups, in particular, relatively large fluorinated alkyl groups improve solubility of these salts in fluorinated solvents that are less flammable than, for example, conventional carbonate solvents. At the same time, the size of fluoroalkyl-substituted salts should be limited to ensure adequate concentration of the salt in an electrolyte and low viscosity of the electrolyte. In some embodiments, the concentration of a fluoroalkyl-substituted salt is at least about 0.5M. Examples of fluorinated solvents include various fluorinated esters, fluorinated ethers, and fluorinated carbonates, such a 1-methoxyheptafluoropropane, methyl nonafluorobutyl ether, ethyl nonafluorobutyl ether, 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-(trifluoromethyl)-pentane, 3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-trifluoromethyl-hexane, and 1,1,1,2,3,3-hexafluoro-4-(1,1,2,3,3,3-hexafluoropropoxy)-pentane.
Public/Granted literature
- US20130337341A1 FLUOROALKYL CONTAINING SALTS COMBINED WITH FLUORINATED SOLVENTS FOR ELECTROLYTES Public/Granted day:2013-12-19
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