Here you can find some information about Li ion batteries and its application, progress in developing new materials and technique, history and background. Some problems, limitations, safety and advances will be discussed as well.
Taipei Int'l Cycle Show 2007
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Taipei Int'l Cycle Show 2007/ 2007/03/24 ~ 2007/03/27 News and information about this show will be available soon.
There are disclosed electrolytes comprising solutions of lithium salts with large anions in polar aprotic solvents with a particular concentration of background salts. The concentration of the background salts is selected to be equal or close to the concentration of a saturated solution of these salts in the aprotic solvents used. The electrolytes disclosed can be used in chemical sources of electric energy such as secondary (rechargeable) cells and batteries comprising sulphur-based positive active materials. The use of such electrolytes increases cycling efficiency and cycle life of the cells and batteries. Inventors: Vladimir KOLOSNITSYN, Elena KARASEVA Application number: 13/153,157 Publication number: US 2011/0236766 A1 Filing date: Jun 3, 2011 Fig. 1 Charge/discharge capacity fade of standard Li-S cell Fig. 9 Charge/discharge capacity fade of Li-S cell with a saturated electrolyte solution as 1.7M of LiClO4 in methylpropylsulfone @ 0.25C ch/dch Fast...
Unlike dense ceramic coatings applied as a separate layer on competing separators, PPT’s products contain ceramic particles that are thoroughly distributed throughout their chemically inert PVDF polymer. The particles reside primarily in the pore walls, leaving a large and uniform open pore structure that enables ions to pass through with less resistance and less heat generation. * More power in high-current applications * Reduced separator shrinkage * Increased thermal stability with less cell degradation * Extended cycle life * Higher bake-out and operating temperatures * Improved puncture and abuse resistance Although, the application of such separator may improve safety, however according to presented test data it will have minimal effect, or not significant. Depends on battery package, it may have serious explosion (due to electrolyte flammability) at much lower temperature.
Polypore’s Celgard Files Suit Against Sumitomo Over Batteries - Bloomberg : "" The complaint, filed Feb. 22 in federal court in Charlotte, North Carolina, claims Sumitomo is infringing a patent issued in 2002 for a separator in high-energy rechargeable batteries. The separators prevent short circuits that can reduce efficiency and limit safety problems from overheating. (Via Bloomberg .)
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