Safety improvement of polymer lithium-ion battery: a comprehensive strategy from materials to design
Publish Time: 2025-02-13
Polymer lithium-ion battery, with its high energy density, lightness and flexibility, occupies an important position in modern electronic devices. However, its safety issues have always been the focus of industry attention. In order to improve the safety of polymer lithium-ion battery, researchers have conducted in-depth research from material selection to battery design, and formed a comprehensive safety improvement strategy.In terms of materials, the safety improvement of polymer lithium-ion battery mainly depends on the improvement of electrolyte, diaphragm and electrode materials. Traditional liquid electrolytes may cause thermal runaway under extreme conditions, leading to battery explosion. Therefore, researchers are committed to developing solid electrolytes, such as solid polymer electrolytes (SPEs), to improve the thermal stability and safety of batteries. These solid electrolytes not only have the advantages of no leakage and high mechanical strength, but also can effectively reduce the volume change of electrode materials and improve the overall performance of batteries.As a key component of the battery, the performance of the diaphragm directly affects the safety and cycle life of the battery. By optimizing the structure and materials of the diaphragm, such as using a multi-layer composite diaphragm or adding a ceramic coating, the thermal stability and mechanical strength of the diaphragm can be improved, thereby enhancing the safety of the battery.In terms of electrode materials, researchers have improved the thermal stability and cycle performance of electrode materials through surface coating, doping and other technologies. For example, surface coating treatment of cathode materials can inhibit phase change, improve the conductivity and thermal stability of materials, thereby reducing internal structural damage and increasing cycle stability.In addition to material improvement, battery design is also the key to improving safety. By optimizing the structural design of the battery, such as using safety devices such as explosion-proof valves and thermistors, the power supply can be cut off in time when the battery is overheated or short-circuited to prevent the situation from further deteriorating. In addition, the introduction of the battery management system (BMS) can monitor the status of the battery in real time and prevent the occurrence of safety accidents.In summary, the safety improvement of polymer lithium-ion batteries requires all-round consideration from material selection to battery design. By continuously improving electrolytes, diaphragms and electrode materials, and optimizing the structural design of batteries, we can effectively improve the safety of polymer lithium-ion batteries and provide strong guarantees for the stable operation of modern electronic devices. In the future, with the continuous advancement and innovation of science and technology, the safety of polymer lithium-ion batteries will be further improved, bringing more convenience and safety to people's lives.
