Lithium Storage in Heat‐Treated SnF₂/Polyacrylonitrile Anode

Abstract

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 1047 mAh g(-1) in the first cycle and 902 mAh g(-1) after 100 cycles. 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.

Nanocomposite of Tin and Lead Oxides Prepared in Plasma of Pulsed High-Voltage Discharge Process: Synthesis and Electrochemical Characteristics

“…It is well-known, that creation of hybrids and nanocomposites, having properties that are not typical for microscale materials, is a promising way to design an advanced electrodes for LIBs. Additionally, as it was shown previously, the usage of Sn or Pb in a form of oxides [6,7], chlorides [8,9], fluorides [10], sulfides [11,12], etc. facilitate the volume stresses due to the formation of damping matrices during initial alloying process (1).…”