18650 battery 3500mah lithium

　　New discovery of industrial 18650 battery 3500mah lithium! Lithium-air battery research achieves new breakthrough

　　Lithium-air battery is a battery that uses lithium as the negative electrode and oxygen in the air as the positive reactant. Lithium-air batteries have higher energy density than lithium-ion batteries because the cathode (mainly porous carbon) is light and oxygen is obtained from the environment rather than stored in the battery. Discharge process: Lithium in the negative electrode releases electrons and becomes lithium cations (Li+). Li+ passes through the electrolyte material and combines with oxygen and electrons flowing from the external circuit at the positive electrode to form lithium oxide (Li2O) or lithium peroxide (Li2O2). and stay on the positive terminal. The open circuit voltage of lithium-air batteries is 2.91V.

　　Due to their high theoretical specific energy, lithium-air batteries are considered as potential alternatives to lithium-ion batteries. However, to date, such systems have been mainly limited to pure oxygen environments and have limited cycle life due to side reactions involving the cathode, anode, and electrolyte. These side reactions can become more complicated in the presence of N2, CO2, and water vapor.

　　In addition, due to the need to store O2, the volumetric energy density of the lithium-oxygen system may be too small for practical applications. Recently, Professor Amin Salehi-Khojin of the University of Illinois at Chicago and Larry A. of Argonne National Laboratory. Led by Professor Curtiss (co-corresponding author), in collaboration with Illinois Institute of Technology and California State University, two strategies were used to confine lithium in simulated air atmospheres containing representative amounts of O2, N2, CO2 and H2O - Side reactions in oxygen batteries.

　　First, the team developed a Li2CO3/C-coated lithium anode that only allows lithium cations to pass through, thereby protecting the anode from the composition of simulated air. Secondly, the cathode was constructed based on previously reported molybdenum disulfide nanoflakes, and a mixture of ionic liquid 1-ethyl-3-methylimidazole tetrafluoroborate (EMIM-BF4) and dimethyl sulfoxide (DMSO) was used as Electrolytes. The components of this system operate together to prevent the formation of by-products in the presence of CO2 and H2O. Works as a lithium-air battery in a simulated air environment and has a cycle life of up to 700 times. The relevant results were published in Nature under the title "Alithium-oxygenbatterywithalongcyclelifeinanair-likeatmosphere".

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