Zhao Xin-Xin, Gu Zhen-Yi, Li Wen-Hao, Yang Xu, Guo Jin-Zhi, Wu Xing-Long
Faculty of Chemistry, National &Local United Engineering Lab for Power Battery, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun, Jilin, 130024, P. R. China.
Chemistry. 2020 Jun 23;26(35):7823-7830. doi: 10.1002/chem.202000943. Epub 2020 May 29.
Phosphate cathode materials are practical for use in sodium-ion batteries (SIBs) owing to their high stability and long-term cycle life. In this work, the temperature-dependent properties of the phosphate cathode Na V (PO ) O F (NVPOF) are studied in a wide temperature range from -25 to 55 °C. Upon cycling at general temperature (above 0 °C), the NVPOF cathode retains an excellent charge/discharge performance, and the rate capability is noteworthy, indicating that NVPOF is a competitive candidate as a temperature-adaptive cathode for SIBs. Upon decreasing the temperature below 0 °C, the cell performance deteriorates, which may be caused by the electrolyte and Na electrode, based on the study of ionic conductivity and electrode kinetics. This work proposes a new breakthrough point for the development of SIBs with high performance over a wide temperature range for advanced power systems.
由于具有高稳定性和长循环寿命，磷酸盐阴极材料在钠离子电池（SIB）中具有实际应用价值。在这项工作中，研究了磷酸盐阴极NaV(PO)OF（NVPOF）在-25至55°C的宽温度范围内随温度变化的特性。在常温（0°C以上）循环时，NVPOF阴极保持优异的充放电性能，倍率性能值得关注，这表明NVPOF是作为SIBs温度适应性阴极的有竞争力候选材料。当温度降至0°C以下时，电池性能恶化，基于离子电导率和电极动力学的研究，这可能是由电解质和钠电极引起的。这项工作为开发适用于先进电力系统的宽温度范围内高性能SIBs提出了一个新的突破点。
