The influence of lithium ion battery materials aging decay factor analysis

Source: 2020 - 04 - 15 all clicks: once the effects of aging decay 1 lithium ion battery materials. Before custom lithium ion battery, the process of charging and discharging cycle is lithium ion electrolyte by trip between the positive and negative material and the process of moving back and forth. In the process of the cycle of lithium ion battery, in addition to the positive and negative REDOX reaction, there are a lot of side effects. If you can cut the side effects of lithium ion battery to a lower level, make the lithium ion can always between the positive and negative material through the electrolyte flow smoothly, can improve the cycle life of lithium ion batteries. 2. According to lithium battery manufacturer's engineer, when lithium ion battery by excessive charge, released from the anode of lithium ion will be excess deposits or embedded negative. Deposition of the active lithium easily react with solvent, heat, elevating the temperature of the battery. Thermal decomposition of lithium battery cathode through release oxygen, making it easier for the electrolyte decomposition, produce a lot of heat [ 25] 。 When the lithium battery discharge voltage below discharge voltage, discharge can form. In the process of over discharge, lithium ion can escape from the cathode is excessive, the next embedded rechargeable lithium-ion batteries will be more difficult. In crowdsourcing [ 26] MCMB as anode, LiCoO2 cathode of batteries in the discharge of 0 V, copper foil set fluid is more serious corrosion, cathode SEI film damage, form the SEI film performance is poorer, and the negative impedance increases, improve the polarization, lithium-ion battery discharge capacity after discharge, in the process of the cycle of charging and discharging efficiency is greatly reduced. Lithium ion battery custom design and manufacture technology of 1, lithium ion battery customization in the process of battery design, the choice of materials is one of the most important factors, the performance characteristics of different materials have different batteries developed by a gap in performance. The cycle of the battery life is only in the anode material and anode materials circulation performance will be a long match good. The electrolyte is an important factor reversible battery capacity. 2. Lithium ion and lithium ion battery electrode materials of disconnection and insertion process is always a process of interaction with the electrolyte, the condition of the interface of electrode material and the change of internal structure has an important influence. The electrolyte in the process of interaction with the positive and negative materials will be lost. In addition, when the battery form the SEI film and in charge, part of the electrolyte will be consumed. Therefore, the type of electrolyte and injection rate will affect the service life of batteries. 3. In terms of ingredients, and pay attention to the positive and negative materials to add quantity, generally speaking, in the design and assembly process, the general requirements of the cathode capacity greater than the capacity of positive electrode. Otherwise when rechargeable lithium will precipitate from the cathode, lithium dendrite formation, affect safety. The excessive anode for the positive electrode and the anode may produce excess lithium dihydrogen, resulting in destruction of structure. Lithium-ion battery production technology mainly includes: the positive and negative ingredients, coating and the membrane, winding, shell, filler, seal and forming. In the process of battery production, every step of the process is very strict. If any process control is bad, may have influence on the performance of the cell cycle. 4. Should be paid attention to in the process of positive and negative electrodes charging, binder addition amount, stirring speed, slurry concentration, temperature and humidity, and ensure the material can be evenly dispersed.