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Lithium Storage in Heat-Treated SnF2/Polyacrylonitrile Anode

机译:热处理SnF2 /聚丙烯腈阳极中的锂存储

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摘要

Tin(II) fluoride (SnF2) has a high Li-storage capacity because it stores lithium first by a conversion reaction and then by a Li/Sn alloying/dealloying reaction. A polyacrylonitrile (PAN)-bound SnF2 electrode was heat-treated to enhance the integral electrical contact and the mechanical strength through its cross-linked framework. The heat-treated SnF2 electrode showed reversible capacities of 1047mAhg(-1) in the first cycle and 902mAhg(-1) after 100cycles. Part of the excess capacity is due to lithium storage at the Sn/LiF interface, and the other part is assumed to correspond to the presence of reduced SnF2 with protons released during the thermal cross-linking of PAN.
机译:氟化锡(II)(SnF2)具有高的锂存储能力,因为它首先通过转化反应然后通过Li / Sn合金化/脱合金反应存储锂。对聚丙烯腈(PAN)结合的SnF2电极进行热处理,以通过其交联的骨架增强整体电接触和机械强度。经过热处理的SnF2电极在第一个循环中显示的可逆容量为1047mAhg(-1),在100个循环后显示为902mAhg(-1)。过量容量的一部分归因于锂在Sn / LiF界面处的存储,而另一部分被认为与在PAN的热交联过程中释放的质子释放的SnF2还原有关。

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