Highly reversible lithium metal secondary battery using a room temperature ionic liquid/lithium salt mixture and a surface-coated cathode active material

Abstract

For the purpose of realizing high-voltage, high-capacity, long-life and safe rechargeable batteries, a lithium secondary battery that uses high-voltage stable ZrO2-coated LiCoO2 cathode powder and a nonvolatile high-safety room temperature ionic liquid was fabricated.

Comparative Study of Lithium Secondary Batteries Using Nonvolatile Safety Electrolytes

“…They were mixed in n-methyl pyrrolidone ͑NMP͒. [20][21][22][23] The mixture solutions were pasted onto the aluminum current collector using the applicator. After drying the cathode paste, the cathode sheet was compressed to increase the packing density and to improve the electrical connectivity.…”

“…6,7 Both electrolytes have been separately investigated in terms of the improvement of various characteristics, for example, improvement of the ionic conductivities and stable interface formation with anode and cathode materials etc. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Although both electrolytes have a potential for the future lithium secondary battery with sufficient safety, a relative comparison of these properties between SPE and ILE has not been reported. Thus, we prepared a lithium solid polymer battery ͑SPB͒, an ionic liquid battery ͑ILB͒, and a conventional battery with an organic liquid electrolyte ͑OLB͒ using common cathode ͑LiFePO 4 ͒ and anode ͑Li͒ material, and compared the physical properties and electrochemical performance.…”

The First Lithium-ion Battery with Ionic Liquid Electrolyte Demonstrated in Extreme Environment of Space

“…Thus, many reports have demonstrated the use of ionic liquid electrolytes and shown their high potential for the development of LIBs. [20][21][22][23][24][25][26][27][28][29][30] However, compared with conventional organic solvent-based electrolytes, most of these ionic liquids, have drawbacks, such as relatively high viscosity and low ionic conductivity resulting in lower charge-discharge rate capability and poor low-temperature characteristics in LIB cells. We successfully identified a promising ionic liquid that contains bis(fluorosulfonyl)imide (FSI ¹ ) as an anion.…”

“…[18][19][20][21][22][23][24] With regard to safety, the application of ionic liquids in LIBs exploits their lower flammability and non-volatility. Such advantages should also be beneficial for LIBs in electronics, vehicle and aerospace applications.…”

Temperature-Dependent Ordering Phenomena of a Polyiodide System in a Redox-Active Ionic Liquid

“…These prominent advantages make them versatile alternatives to conventional solvent-based systems. Their potential applications range from fuel cells, 2 electrolytes in solar cells, 3 batteries and supercapacitors, 4 solvents for catalysis and clean chemical synthesis, 5 and solvents for cellulose 6 to heat-transfer fluids and lubricants. 7 When used as an ion-transporting medium, an anomalously high charge transport efficiency has been observed among the salts which form an ionic liquid containing I − /I 3 − anions.…”