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

Abstract

A novel thiolane polymer, poly[1,2,4,5-tetrakis(propylthio)benzene] (PTPB), was synthesized by facile oxidative-coupling polymerization, characterized by FT-IR, XPS, XRD, TGA and EA, and tested as cathode active material in rechargeable lithium batteries. The FT-IR, XPS and elemental analysis confirm the occurrence of polymerization and show the existence of C-S-C bonds. The results show that the thiolane polymer has electrochemical activity as cathode material in lithium batteries and thioether bonds may be the centers of the electrode reaction. A maximum specific capacity of 200 mAh g -1 was obtained and this agrees roughly with the theoretical prediction. In addition, high voltage efficiency was obtained first time from sulfide polymer.

Organic Electrode Materials for Rechargeable Lithium Batteries

“…[ 83 ] All the four thioether sites in 48 are active for reversible electrochemical oxidation. Thioether 50 exhibits impressively small electrochemical polarization with the difference between charge/discharge potentials being merely ∼ 0.1 V. [ 85 ] In contrast, the structurally related thioether 51 shows two oxidation peaks at high potentials of 3.0 and 4.0 V vs Li/Li + but a low reduction potential of 1.7 V vs Li/Li + in a cyclic voltammetry measurement. During the initial twenty cycles, the capacity remains > 95% of the theorectical value and does not show observable reduction.…”

Inhibition by tween-85 of the corrosion of cold rolled steel in 1.0 M hydrochloric acid solution

“…Ionic surfactants have been used for the corrosion inhibition of steel [7][8][9][10][11][12][13][14][15][16][17][18][19][20], copper [21][22][23][24][25][26], aluminum [27][28][29][30] and other metals [31,32] in different media. Recently, some nonionic surfactants have also been widely used as corrosion inhibitors for steel in acidic media [33][34][35][36][37][38].…”

Thianthrene-functionalized polynorbornenes as high-voltage materials for organic cathode-based dual-ion batteries

“…[16][17][18] Furthermore, high temperature annealing, a common procedure in the synthesis of ceramic cathode materials, is not required for the preparation of organic materials. A variety of organic cathode materials has been proposed and investigated, 19,20 such as conducting polymers, [21][22][23][24] organosulfur compounds, [25][26][27][28][29][30][31][32][33][34] radical Fig. 1 Schematic of a battery with a thianthrene polymer as cathode--active anion-intercalating material (left); two--fold oxidation of thianthrene (1, top right) and cyclic voltammogram of 1 (1 mM in CH3CN with 0.1 M n--Bu4PF6, glassy carbon electrode, scan rate 100 mV/s).…”