低温等离子体在电化学储能器件表面修饰的应用

面对日益严峻的能源危机和环境污染，人类社会需减少化石燃料使用，发展新能源。以锂离子电池为代表的二次电池作为新能源存储设备在生活中得到了广泛应用。然而，在充放电过程中，以电极材料为代表的电化学储能器件面临体积膨胀、活性物质溶解等问题，影响二次电池的电容量和安全性。对电化学储能器件进行合理的表面修饰是改善上述问题的关键。等离子体具有高活性，可以有效抑制电极材料表面活性物质溶解、避免副反应的发生，提高二次电池的循环寿命和放电容量。本工作对等离子体技术，特别是低温等离子体进行了介绍，并总结了低温等离子体技术在电化学储能器件表面修饰中的最新进展，重点介绍了其在先进电极材料表面的应用，最后讨论了等离子体方法优点，并对其未来面临的挑战和应用进行了展望。

Application of low-temperature plasma in surface modification of electrochemical energy storage devices

Facing the increasingly severe energy crisis, it is necessary to reduce the use of fossil fuels and develop new energy materials. Energy storage materials have attracted widespread attention as the key to the safe and stable operation of the power system after the integration of renewable energy sources. At present, secondary batteries represented by lithium-ion batteries have been widely used as new energy storage devices. Its electrochemical performance is affected by various parts of electrochemical devices, such as electrode materials, separators, and current collectors. Among them, the electrode material is the core component of the secondary battery, which greatly determines the comprehensive electrochemical performance of the secondary battery. However, during the charging and discharging process, the core component electrode material faces problems such as volume expansion and active material dissolution, which further affect the capacity and safety of the secondary battery. Reasonable surface modification of electrochemical energy storage devices is the key to solving the above problems. Recently, plasma technology, owing to its high activity, which can induce rapid and efficient reactions under relatively mild conditions, has been widely used on both industrial and laboratory scales as a very promising and important tool for surface modification of electrochemical energy storage devices. The use of plasma to treat the surface of the electrochemical energy storage devices can effectively inhibit the dissolution of the active material, avoid the occurrence of side reactions, and improve the cycle life and discharge capacity of the secondary battery. This work introduces plasma technology, especially low-temperature plasma, and summarizes the latest progress in low-temperature plasma technology in electrochemical energy storage devices including electrode material and separator. Finally, plasma technology is discussed. The advantages of the method, as well as the challenges and applications it faces in the prospect are analyzed.