#Murata solid state battery portable#
#Murata solid state battery series#

22, 23 The highest ion conductivity has been obtained for an SCE where the nanoporous inorganic matrix is prepared by the sol-gel method. To fulfil these requirements, solid composite electrolytes (SCEs) using a non-volatile ionic liquid (IL) as solvent, a Li-salt for electrolyte and inorganic oxide matrix have been explored. 20, 21 High-performance SEs with fast lithium-ion conduction, good interfacial contact with the electrodes, high thermal stability, wide electrochemical window and sufficient mechanical strength, while using non-toxic and environmentally friendly materials, are still to be developed. Moreover, polymer electrolytes have relatively low thermal stability, and mechanical strength to prevent the growth of lithium dendrites. 17– 19 The electrical contact is much less of an issue with polymer-based SEs because of their soft and adhesive nature however, their ionic conductivity is typically lower than 10 −4 S cm −1. 15, 16 To date, sulphide-based electrolytes with high conductivity up to 10 −2 S cm −1 have been developed, but in addition to the improvement of the interfacial contacts, the potential formation of toxic H 2S gas needs to be resolved for these electrolytes. Even though high pressures are applied to decrease the resistance at the interface as an additional process in the battery fabrication, the interfacial contact degrades during cycles of charging and discharging. Ceramic-based SEs typically suffer from a low ionic conductivity of 10 −4 S cm −1 and a poor interface contact with electrodes. The SEs developed so far, however, face several issues. This increases the cell voltage and reduces the weight of the package, potentially yielding an energy density beyond 1000 Wh L −1.

#Murata solid state battery series#

11, 12 Moreover, multiple all-solid-state cells can be stacked in bipolar series within a single package. In addition, SEs are deemed to suppress Li dendrite formation and thus may enable high-energy density batteries with Li-metal anodes. 8– 10 Solid materials can remove the risks of electrolyte leakage, volatilization, flammability and explosion. 7 To avoid accidents and ensure safety, all-solid-state batteries with a solid electrolyte (SE) have been considered. 4– 6 However, the current LIBs use a volatile and flammable organic solvent as their liquid electrolyte solution, which poses a risk of fire and explosion in the event of internal shorting.

#Murata solid state battery portable#

1– 3 LIBs have dominated the portable battery market since their release in 1990, and they are currently used as the power source for electrical vehicles, which are slowly replacing those powered by fuel. Lithium-ion batteries (LIBs) are some of the most promising candidates to satisfy this demand because of their high energy density.

To realize a green and sustainable energy society, the requirements for energy storage devices have been increasing. Our results show that impregnation of a liquid precursor is an efficient approach for an excellent electrode/electrolyte interface contact in the solid composite electrode as the reaction kinetics at the interface of the active mass and nano-SCE are sufficiently fast, and thus is advantageous compared with the other types of solid electrolytes. The C-rate performance of the prepared solid batteries is comparable to that of cells with the conventional lithium hexafluorophosphate (LiPF 6) electrolyte. The capacity of the Li-LiFePO 4 cell using the EMI-FSI based nano-SCE reaches 150 mAh g −1 at 0.1C and 113 mAh g −1 at 1C, which is higher than that achieved by the other reported batteries that use a similar composite electrolyte. The nano-SCE, composed of 1-ethyl-3-methylimidazolium bis(fluorosulfonyl) imide (EMI-FSI) and Li-FSI confined in the mesoporous silica matrix, exhibits an ionic conductivity of 6.2 mS cm −1 at room temperature. We present a high-rate performance in solid-state lithium metal and Li-ion batteries using a silica-gel solid nanocomposite electrolyte (nano-SCE) made by the sol-gel method with a bis(fluorosulfonyl)imide (FSI)-based ionic liquid. A nanocomposite electrolyte composed of a non-volatile ionic liquid, organic Li-salt and porous-inorganic material can be a promising option as a solid electrolyte material.