Sulfides organic polymer: Novel cathode active material for rechargeable lithium batteries

Synthesis and properties of novel organic thiolane polymer as cathode material for rechargeable lithium batteries

“…There is a well-defined plateau for charge and discharge curves, which are very close to each other: 2.4 V on charge and 2.3 V on discharge. The very close voltages mean high voltage efficiency, which is higher than those of disulfide polymers [6][7][8], also different from our previously reported sulfide polymers [10]. From the literature organic sulfur containing polymers have generally the drawback of low voltage efficiency.…”

“…Because of the instability of the S-S bond and the solubility of small molecules produced in the redox process, these materials have the disadvantage of rapid specific capacity fading. Recently, it has been found in our group that thiolane containing polymers also have the ability to store energy as cathode materials in rechargeable lithium batteries [10]. But it is still uncertain whether other thiolane containing polymers (thioether polymers) are electrochemically active as cathode materials.…”

Poly[3,4-(ethylenedithio)thiophene]: High specific capacity cathode active material for lithium rechargeable batteries

“…In particular, when poly(ethylene-3,4-dioxythiophene) (PEDOT) was utilized as the cathode active material in 0.1 M Bu 4 NPF 6 /PC and 0.1 M Bu 4 NPF 6 /CH 2 Cl 2, a significantly capacity of 140 mAh g −1 that is higher than other conducting polymers (e.g. polyaniline, polypyrrole and polyphenylene) can be obtained [8,9]. However, the discharge specific capacity of PTH and its derivatives are generally too low to be utilized in commercial batteries [1].…”

“…However, the discharge specific capacity of PTH and its derivatives are generally too low to be utilized in commercial batteries [1]. Meanwhile, thiolane-containing polyphenylene that exhibits high specific capacity has also been reported [9]. It shows that the thioether bonds on thiolane can offer high electron storage, and therefore, polythiophene derivatives with thioether bonds may be used as high-performance cathode active materials.…”

Thioether Bond Containing Polymers as Novel Cathode Active Materials for Rechargeable Lithium Batteries

“…Scheme 1. Organic disulfide compounds for cathode active material in rechargeable lithium batteries We found that thioether bond containing polymers (thioether polymers) other than conventional disulfides could also storage energy as cathode active materials and reported the research results in series papers since 2007 Zhang et al, 2007Zhang et al, , 2008Zhang et al, , 2009). The thioether polymers contain thioether (C-S-C) bonds instead of disulfide (-C-S-S-C-) bonds, in which the thioether bonds are the function groups to undergo electrode redox reaction.…”