canrd

【Overview】： The rolling of battery electrodes involves the friction between the rollers and the electrode, which draws the electrode sheet into the gap between the rotating rollers. During this process, the electrode sheet undergoes compression and deformation. Unlike the rolling of steel, where the rolling process mainly causes the material to extend longitudinally and widen laterally without a change in density, the rolling of battery electrodes focuses on the compaction of active material on both the positive and negative electrode sheets. During this process, the particles undergo migration, rearrangement, and embedding, resulting in reduced voids between particles and a denser arrangement. The purpose is to increase the compaction density of the positive or negative electrode materials. Proper compaction density can increase battery discharge capacity, reduce internal resistance, minimize polarization loss, extend cycle life, and improve the utilization rate of lithium-ion batter...

Determined to Win || <AM> Professor He Xianru's team from Southwest Petroleum University: Realizing ultra-stable aqueous zinc metal anodes through efficient polymer interfaces that pre-establish ion transport pathways via electrolyte initiators

Latent dissolution behavior of electrolytes: high voltage, high stability batteries | NSR Potassium-ion batteries are low-cost, abundant in resources, and have a potential high voltage window, showing great potential in the field of large-scale energy storage.  The electrolyte has a significant impact on the performance of the battery . Ether-based electrolytes have attracted much attention because they can effectively dissolve potassium salts and provide high ionic conductivity.  However, this type of electrolyte also has obvious shortcomings:  weak antioxidant ability and poor compatibility with graphite negative electrode materials  .  This greatly limits its application in battery systems.

Lithium-ion battery overview Lithium-ion battery is a secondary battery. Its working principle is: during the charge and discharge process, lithium ions are in a state of movement from positive electrode → negative electrode → positive electrode. During the charge and discharge process, lithium ions are intercalated and deintercalated back and forth between the two electrodes. That is, during charging, lithium ions are deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state. The opposite is true during discharge. Lithium-ion batteries are complex systems consisting of positive electrode materials, negative electrode materials, electrolytes , separators, conductive agents, binders and packaging materials. Due to their high operating voltage, high specific energy density, long cycle life and wide operating temperature range, lithium-ion batteries have been widely used in new ene...

1. Electrolyte It is an important component of lithium batteries. It conducts lithium ions inside the battery and has an important impact on the performance and life of the battery. Lithium battery electrolyte is usually composed of organic solvents, electrolytes and additives.   Organic solvent is the main component of electrolyte, which is usually a flammable, explosive and toxic liquid, such as dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC), etc.  These organic solvents can dissolve electrolytes to form ion conductors, and can also provide a certain electrochemical stability.   Electrolyte is an ion conductor in the electrolyte, which is usually a lithium salt,  such as LiPF6, LiBF4, LiClO4, etc. These lithium salts can dissociate into lithium ions and negative ions in the electrolyte, thereby realizing the conduction of lithium ions.   Additives are some chemical substances added to improve the performance of the electrolyt...

What is electrolyte? The main materials of lithium-ion batteries are: positive electrode, negative electrode, electrolyte, and separator  . As one of the four key materials of lithium-ion batteries, electrolyte is called the "blood" of lithium-ion batteries. From the working principle of lithium ions, lithium-ion batteries are secondary batteries (rechargeable batteries) that mainly rely on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li+ is embedded and de-embedded between the two electrodes: when charging, Li+ is de-embedded from the positive electrode and embedded in the negative electrode through the electrolyte , and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

  1. Composition of electrolyte The basic functions of electrolyte: It transfers lithium ions between the positive and negative electrodes, but insulates electrons to ensure that the battery can be charged and discharged smoothly. Ideal electrolyte requirements: 1) It is an excellent conductor for lithium ions and an insulator for electrons; 2) Except for the migration of lithium ions, no other side reactions occur on the electrode surface; 3) Do not react with other battery components; 4) Good chemical stability; safe and environmentally friendly;

This article introduces the role of lithium battery electrolyte in detail. The electrolyte not only plays a key role in conducting ions to complete the charging and discharging process in the battery, but also has important significance in maintaining the stable performance of the battery, preventing plate corrosion, dissipating heat, controlling temperature, improving energy and power density, providing high voltage and high specific energy, protecting battery safety, and adapting to wide temperature applications. By understanding the role of the electrolyte , it provides a reference for better design and optimization of lithium batteries and improving their performance and safety.