Preparation And Electrochemical Performance Study On Environmentally Friendly Water-based Cathode Of Lithium-ion Battery

As a new kind of clean and renewable energy, lithium-ion batteries have many advantages such as high working voltage, large energy density, light quality, etc. And they have been widely used in mobile phones, laptops, bluetooth headset, digital camera, etc. However, at present, industrialization and marketization of lithium-ion batteries basically all adopt organic solvents system positive pole pieces. Since organic solvent is highly volatile and difficult in recycling, it leads to environmental pollution, harm to human health as well as increased equipment input. If deionized water is adopted as solvent and water-based binder is used to prepare positive slurry, the above disadvantages are solved.Based on a comprehensive review of lithium-ion batteries according to the present research, in this paper, we systematically elaborated the manufacturing process of water-based environment-friendly manganese acid lithium-ion battery, researched the key factors of water-borne binder in application of lithium-ion batteries, and synthetically tested the charge and discharge properties, cycle performance, magnification performance along with safety performance of the environmentally friendly water-based cathode of lithium-ion battery.Compared with traditional lithium ion battery, the water-based cathode lithium-ion battery has better circulation performance. Its retention rate of 500 times cycle is 84.90%, better than 78.00% of organic system lithium-ion battery. Meanwhile, the inherent resistance of water-based lithium-ion battery is smaller than that of the traditional organic system lithium-ion batteries.High discharge ability is one of the weakness of lithium-ion batteries. In this paper, we discharged at different rate of current, then found the discharge capacity at 5C was 80.0% of discharge capacity at 0.5C. And the overheat phenomenon didn’t appear because the surface temperature of battery was 59℃during discharging at 5C. Thus, the water-based cathode lithium-ion batteries had good high rate discharge properties.The safety of lithium-ion power battery is the focus of concern. In this text, we tested the safety performance of the lithium-ion power battery by puncturing, short-circuit, bumping and falling, no fire or explosion phenomena happened. So we concluded that the environmentally friendly water-based cathode of lithium-ion battery had excellent safety performances.