A triphenylamine-based polymer with anthraquinone side chain as cathode material in lithium ion batteries

作者：Huang, Wanrong; Jia, Tao; Zhou, Guangying; Chen, Sha; Hou, Qiong^*; Wang, Yuhai^*; Luo, Suilian; Shi, Guang; Xu, Bingjia

来源：Electrochimica Acta, 2018, 283: 1284-1290.

DOI：10.1016/j.electacta.2018.07.062

• Triphenylamine polymer
• Anthraquinone
• Lithium ion batteries
• Cathode active material

A triphenylamine-based polymer poly[N-(anthraquinone-2-yl)-N,N-diphenylamine] (PDPA-AQ) with anthraquinone side chain was synthesized by a simple chemical oxidative polymerization. Due to the introduction of anthraquinone units with a high specific capacity in the side chain, the polymer PDPA-AQ has a high theoretical specific capacity, about twice of polytriphenylamine (PTPA). The lithium ion batteries based on PDPA-AQ as cathode active material and lithium foil as anode were assembled and their electrochemical properties were investigated. For a comparison, the electrochemical performance of the monomer DPA-AQ was also studied. Both monomer DPA-AQ and polymer PDPA-AQ have high initial discharge specific capacity, about 129 mAh g(-1) and 159 mAh g(-1) respectively, which are higher than the theoretical specific capacity of PTPA-based cells. The polymer PDPA-AQ has better discharge specific capacity, cycle performance and rate performance than monomer DPA-AQ which shows that the design idea of introducing an electrochemically active carbonyl compound into the polytriphenylamine side chain can improve the specific capacity of the PTPA.

• 出版日期2018-9-1