US 11,901,509 B2
Electrolyte solution and electrochemical device
Ryuhei Matsumoto, Kyoto (JP); Daisuke Mori, Kyoto (JP); and Yuri Nakayama, Kyoto (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed by MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed on Aug. 20, 2019, as Appl. No. 16/545,795.
Application 16/545,795 is a continuation of application No. PCT/JP2017/035512, filed on Sep. 29, 2017.
Claims priority of application No. 2017-029933 (JP), filed on Feb. 21, 2017.
Prior Publication US 2020/0075999 A1, Mar. 5, 2020
Int. Cl. H01M 10/0569 (2010.01); H01M 10/0568 (2010.01); H01M 4/46 (2006.01); H01M 10/054 (2010.01)
CPC H01M 10/0568 (2013.01) [H01M 4/466 (2013.01); H01M 10/054 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0028 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An electrochemical device comprising a negative electrode including a magnesium-based material, and a positive electrode including S8 or polymeric sulfur,
wherein the electrochemical device includes an electrolyte solution consisting of a solvent composed of linear ether, and magnesium salt dissolved in the solvent,
wherein a total concentration of the magnesium salt in the electrolyte solution is in a high concentration state such that the magnesium salt is dissolved in 3 moles or more per liter of the solvent, thereby the solvent in the electrolyte solution is in a state of being substantially coordinated to the magnesium salt and not substantially coordinated to the S8 or polymeric sulfur, and
wherein solubility of S8 or polymeric sulfur is 0.5 milligram or less per milliliter of the electrolyte solution.