摘要：Aqueous zinc-ion batteries(ZIBs)have attracted immense attention for flexible energy storage devices due to their high safety and low ***,conventional flexible aqueous ZIBs will undergo severe capacity loss at subzero temperature due to the inevitably freeze of *** addition,under large bending or stretching strains,the encapsulation of devices would be damaged,which causes the evaporation of water in electrolytes and results in device ***,an anti-freezing and anti-drying gel electrolyte based on polyacrylamide(PAM)and glycerol(Gly)is *** strong hydrogen-bonding interactions between PAM or Gly and water molecules not only avoid the crystallization of the gel electrolyte at low temperatures,but also constrain the free water and restrict its ***,such gel electrolyte displays a high ionic conductivity of 9.65×10^(−5)S cm^(−1)at−40℃.Furthermore,it can restrict the dehydration process when the electrolyte is exposed to ambient *** flexible ZIBs based on such gel electrolyte exhibit excellent electrochemical performance at−40℃and the devices without encapsulation retain 98%of their initial capacity in ambient condition after 30 *** work provides a route to design anti-freezing and anti-drying gel electrolytes for aqueous energy storage devices.

摘要：针对顺层瓦斯抽采钻孔布孔间距存在的盲从性与模糊性等问题,通过数值模拟软件,研究分析相同布孔间距和不同布孔间距条件下受抽采叠加效应影响煤层瓦斯压力变化,并推导布孔间距与单钻孔抽采半径的关系式,以此确定合理布孔间距。结果表明:受抽采叠加效应影响,相邻钻孔内测瓦斯压力低于外侧同距离处瓦斯压力;随布孔间距的增加,相同位置处受抽采叠加影响逐渐减弱;以某矿M12煤层11122运输巷为考察地点,得出120 d的预抽期有效抽采半径为2.2 m,多孔抽采的布置间距为4.4~6 m,并验证了布孔间距与单钻孔抽采半径关系式的正确性,为现场瓦斯抽采治理提供一定的理论依据。

摘要：金属有机骨架(MOFs)是由有机骨架与金属节点组成的多孔新型功能材料,区别于普通的无机多孔材料和有机物,凭借多孔以及可设计性的骨架结构,实现将无机与有机材料相结合,利用化学配位以及掺杂等方式可以制备符合实际需求的功能材料。随着金属有机骨架材料的种类、功能和制备技术不断拓展,其在智能光电显示领域的应用也备受关注。其中,电致变色作为光电器件的重要研究方向,电致变色器件正在向更大变色范围、更快变色速度以及柔性可折叠的方向发展,原有材料体系已无法满足新的产品要求,但金属有机骨架的出现可以在一定程度上规避这些问题。本文着重介绍金属有机框架在电致变色的研究进展,详细综述金属有机框架在电致变色领域应用中所遇到的三个问题,分别是导电性、氧化还原性变色及薄膜制备手段,分析金属有机框架在电致变色领域的设计优化策略,同时也对MOFs在电致变色多功能应用所面临的挑战与发展前景进行总结。