High-performance Li-organic battery based on thiophene-containing porous organic polymers with different morphology and surface area as the anode materials

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2020-09, Vol.395, p.124975, Article 124975
• Main Authors: Xu, Ning, Mei, Shiwei, Chen, Zhangxin, Dong, Yujie, Li, Weijun, Zhang, Cheng
• Format: Article
• Language: English
• Subjects: Anode materials; Battery performance; Morphology; Surface area; Thiophene-containing
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2020.124975

•Thiophene-based polymers with different morphology and surface area are designed.•The pBHT with hollow tube morphology and high surface area shows the low capacity.•The morphology may affect the SEI formation and possible Li-transporting problem.•The pBABT with the macroporous morphology shows the high capacity and stability.•The morphology of electrode material influences the stability performance of LIBs. It is the hot issue for Li-organic battery that whether the higher specific surface area of the porous organic polymers as the electrode materials can benefit to the better battery performance. In this article, the conjugated polymer based on star-shaped benzene-thiophene structure (pBHT) and benzene-ethynyl-thiophene structure (pBAT and pBABT) were designed and successfully prepared. The pBHT polymer exhibits the unique stacked hollow tube morphology and possesses the high surface area (~1139 m2/g), while the polymers pBAT and pBABT both display the macroporous morphology with the low surface area (32.5 m2/g and 12.5 m2/g). Being explored for the battery performance as anode materials, the pBHT electrode exhibits a very low discharge capacity (