Synthesis and Properties of Novel Sulfide-Containing Aniline Copolymers as a Cathode Material for Li-Ion Batteries

✍ Scribed by Chang Su; Yinpeng Ye; Lihuan Xu; Cheng Zhang

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 776 KB
• Volume: 212
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.201100380

✦ Synopsis

Abstract

A novel sulfide‐containing aniline, 4‐amino‐dihydrobenzothiophene (ADBT), is synthesized by the alkylbromination of 1,2‐dimethyl‐3‐nitrobenzene. Copolymers of aniline and ADBT, P(An‐co‐ADBT), are prepared by chemical oxidative polymerization and tested as a cathode material for Li‐ion batteries. The results show that the copolymerization activity of ADBT is lower than that of aniline. The charge/discharge tests show that the P(An‐co‐ADBT)‐2 gives well‐defined and sloping plateaus in the potential rang of 3.0–4.0 V and quite a high capacity of 104.7 mAh g^−1^. The P(An‐co‐ADBT)‐2 also shows high cycling stability and coulombic efficiency. After 50 cycles, the discharge capacity of the P(An‐co‐ADBT)‐2 still maintains 87.8% of the capacity obtained at the initial cycle.