How does lithium polymer battery perform under extreme temperature conditions?

　　The performance of lithium polymer batteries under extreme temperature conditions can be optimized through special design. Under low temperature conditions, the challenges faced by lithium polymer batteries include slow ion transport, severe battery polarization, increased internal resistance, increased electrolyte viscosity, and increased energy barrier for lithium ion desolvation. To address these challenges, researchers have adopted the following strategies:

　　1. Optimizing electrolyte: By introducing low melting point organic solvents or high concentration electrolytes, the ion conductivity can be improved, thereby maintaining battery performance at low temperatures. For example, using fluorinated solvents can reduce the desolvation energy barrier, ensure stable SEI formation, and broaden the operating temperature range of the battery.

　　2. Modification of electrode materials: Select electrode materials with fast ion diffusion and low desolvation energy barrier, such as lithium vanadium phosphate (LVP), lithium spinel titanate (LTO), and lithium spinel manganese oxide (LMO), which can exhibit good performance at low temperatures.

　　3. Battery structure design: When designing batteries, consider the influence of temperature, for example, monitoring and controlling the temperature of the battery through a battery management system (BMS) to ensure that the battery operates within a suitable temperature range.

　　4. Using solid or quasi solid electrolytes: Solid or quasi solid electrolytes can to some extent reduce the problem of increased electrolyte viscosity at low temperatures, thereby improving the low-temperature performance of batteries.

　　Under high temperature conditions, lithium polymer batteries may face risks of electrolyte decomposition, electrode material degradation, and thermal runaway. To improve the high-temperature performance and safety of batteries, the following measures can be taken:

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