Synthesis of PAN/SnCl2 composite as Li-ion battery anode material

Abstract

A novel process was proposed to synthesize the pyrolytic polyacrylonitrile (PAN)/SnCl 2 composite anode material for Li-ion batteries. The preparation started with the dissolution of PAN and SnCl 2 in dimethylformamide (DMF), followed by drying of the solution and pyrolysis of the dried mixture of PAN and SnCl 2 at 300°C, leading to homogenous dispersal of SnCl 2 in pyrolytic PAN, which becomes conducting polymer matrix. The composite presented stable cycling capacity of about 490 mAh/g. It is demonstrated that SnCl 2 , which has been considered to be an inactive electrode material, can become active by the proposed composite technique. This paves the promising way to prepare electrode materials for Li-ion batteries.

ZT > 0.1 Electron‐Carrying Polymer Thermoelectric Composites with In Situ SnCl2 Microstructure Growth

“…We chose SnCl 2 as an additive because of its well‐established reducing activity in organic chemistry. Surprisingly, its electronic properties as an anhydrous solid do not appear to have been measured, nor has its in situ microcrystallization in poly­mer environments been observed; the closest precedent being hydrated proton conductors . Other tin‐based materials have previously been investigated as potential TE materials, experimentally and through computation, including pure tin films, tin oxides, tin selenides, tin clathrates, and tin sulfide, or as beneficial TE impurities in telluride‐based inorganic materials …”

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).…”

The electrochemical characteristics of sulfur composite cathode

“…This is probably because that the composite is oxidatively destroyed when overcharge takes place. The differential capacity curves (dQ/dV) can be used to elucidate some of the locations of lithium storage in active materials [19][20][21][22]. The differential capacity curves permit easy graphical analysis.…”