Experts predict that called ISP (FluoroSulfonylImide) of the TFSI anion is known to be a substitute material. This equipment and TFSI is different from the right and left with the non-CF3, but F. CF3 F ratio smaller, thus reducing the overall size. As mentioned above, small ions, the charge density will be larger, easier to form crystals, but the magnitude of the size of ions, most of the viscosity the easier it is to reduce the effect best. The reason is that the ionic liquid through the ionic liquid itself, the performance of the viscous resistance of promoting the charge.
Above have been saying that the negative ions, in fact, positive ions are also a number of options. For example, you can use the name EMI (1-ethyl-3-methylimidazolium) substances. In the melting point is concerned, the use of salt TFSI -18 ℃, the use of salt as a ISP -12.9 ℃, the practical application there are no major differences. The viscosity at 25 ℃ different ISPs 32.6mPa • s • s 17.9mPa until reduced by about half. In addition, ISPs in the electrolyte, the ionic conductivity reflect the performance of 9.1mS/cm increased 16.5mS/cm, has raised almost doubled. These indicators, but not as an organic solvent widely used at present, but belong to the same level of organic solvent. In this way, ISPs should be applied to the Dell FK890 battery.
In practice, the battery experiences of First Instance has achieved unexpected results: FSI and TFSI different, is not detrimental to the anode. The TFSI, there will be damage to the battery anode serious problems. And for reasons unknown.
Although still in the evaluation of the implementation stage, but not the anode corrosion, at least the performance of basic operation was confirmed. That any “rich” (Kansai University, Ishikawa), so that future performance will be constantly improved.
Make all the technology of solid coating particles, the battery
The second way to leave the organic solvent is the set of cells in the solid state. Original positive and negative is strong, then simply become a solid electrolyte can be. Osaka Prefecture University has studied the use of the class of sulphides all batteries, the solid electrolyte. For example, heating Li2S-P2S5 crystal glass after battery class, its conductivity at room temperature for more than 10-3S/cm reached. Has been achieved with the current use of the same level as the liquid electrolyte. In addition, the conductivity also increases in May are forecast to have reached a “seven times” the objective “dark horse”.
Osaka Prefecture University in April 2009, published jointly with the Toyota battery technology for all-solid coating particles. All semiconductor state thin film lithium battery type and accumulation-type. To use the car, the capacity is the decisive factor, if the University of Osaka Prefecture may improve the ability of the accumulation type launched a vigorous development. Specific approach of the negative active material, the cathode active material and solid electrolyte particles composed of three samples, respectively, according to the levels of bias of the Dell GD761 battery law is gradually changing the mixing ratio, mixing and overlapping.
The difficulty lies in the method of grain contact resistance limit. This case, if the central government of the liquid electrolyte can be used “phenomenon” wet to ensure solid contact and liquid. While the differences between solids, micro-view of a single contact. In response, industry has been taken to put pressure on the deformation of tiny particles occurs as a means to increase the contact surface of the evolution of ideas.
Osaka Prefecture University was chosen as a starting point in another direction, by the use of solid electrolyte thin film coating of electrode active material particles on the surface to reduce contact resistance. Electrode active material LiCoO2 used (cobalt oxide, lithium), the VGP-BPS9A solid electrolyte Li2S used P2S5 types of material particles coated with PLD (filing of pulsed laser ablation) method.
PLD is one of the methods of thin film deposition. Objective is to use laser ablation, so the target material sputtered thin film formed on the bottom. Here, the practice is located in the above objective, located in the lower floor. Side of the floor vibrating, so the particle flux LiCoO2, hand, and the solid electrolyte particles are deposited on the surface to form a thin film. The particles are made from ALL-strong unit and the use of coated particles avoiding manufacturing time compared to a larger unit capacity. Confirmed the effectiveness of coated particles, so that all semiconductor sony VGP-BPS2A battery state practice, a major breakthrough.