发展大规模储能技术是实现清洁能源的高效利用,进而实现国家碳中和目标的关键。相较于目前广泛应用的锂离子电池,钠离子电池(sodium ion batteries,SIBs)原材料资源丰度高且成本低,是非常有潜力的一种大规模储能技术。近年来,SIBs在室...发展大规模储能技术是实现清洁能源的高效利用,进而实现国家碳中和目标的关键。相较于目前广泛应用的锂离子电池,钠离子电池(sodium ion batteries,SIBs)原材料资源丰度高且成本低,是非常有潜力的一种大规模储能技术。近年来,SIBs在室温下表现出优异的电化学性能,但其在低温下的应用面临着诸多挑战,这极大地限制了其在极端环境下的应用。缓慢的钠离子扩散速率和较差的电荷转移动力学是导致SIBs低温下性能差的主要原因,而这与控制体相和界面离子传输的电解液密切相关。本文首先从电解液角度简要阐述了SIBs低温性能衰退的原因;然后,从传统电解液优化和新型低温电解液两个方面综述了低温电解液的研究进展,系统地总结了低温SIBs电解液中有关碳酸酯类溶剂、醚类溶剂、添加剂和溶剂化结构的相关研究;最后,对低温电解液的发展前景予以展望。展开更多
The synthesis of zeolites with special morphologies has attracted much attention,because the morphologies influence the efficiency of catalysis,applications as the hosts for micro-devices,and so on. Silicalite-1 with ...The synthesis of zeolites with special morphologies has attracted much attention,because the morphologies influence the efficiency of catalysis,applications as the hosts for micro-devices,and so on. Silicalite-1 with chain-like morphology (0.576.33 m) were synthesized successfully with poly(diallyldimethylammonium chloride) (PDDA) as an additive and was characterized by XRD and SEM. The PDDA as the additive in the synthesis system was the real key for the formation of the chain-like morphology of the products. The length and the diameter of the material can be tuned through adjusting the molar ratios of PDDA and TPAOH. The straight channels of materials are longer and their openings are much fewer than those of the traditional slicalite-1 crystals,because of the crystal stacking along the b axis.展开更多
文摘发展大规模储能技术是实现清洁能源的高效利用,进而实现国家碳中和目标的关键。相较于目前广泛应用的锂离子电池,钠离子电池(sodium ion batteries,SIBs)原材料资源丰度高且成本低,是非常有潜力的一种大规模储能技术。近年来,SIBs在室温下表现出优异的电化学性能,但其在低温下的应用面临着诸多挑战,这极大地限制了其在极端环境下的应用。缓慢的钠离子扩散速率和较差的电荷转移动力学是导致SIBs低温下性能差的主要原因,而这与控制体相和界面离子传输的电解液密切相关。本文首先从电解液角度简要阐述了SIBs低温性能衰退的原因;然后,从传统电解液优化和新型低温电解液两个方面综述了低温电解液的研究进展,系统地总结了低温SIBs电解液中有关碳酸酯类溶剂、醚类溶剂、添加剂和溶剂化结构的相关研究;最后,对低温电解液的发展前景予以展望。
文摘The synthesis of zeolites with special morphologies has attracted much attention,because the morphologies influence the efficiency of catalysis,applications as the hosts for micro-devices,and so on. Silicalite-1 with chain-like morphology (0.576.33 m) were synthesized successfully with poly(diallyldimethylammonium chloride) (PDDA) as an additive and was characterized by XRD and SEM. The PDDA as the additive in the synthesis system was the real key for the formation of the chain-like morphology of the products. The length and the diameter of the material can be tuned through adjusting the molar ratios of PDDA and TPAOH. The straight channels of materials are longer and their openings are much fewer than those of the traditional slicalite-1 crystals,because of the crystal stacking along the b axis.
