Polymeric electrodes have attracted considerable attention for their potential as Li-ion battery (LIB) electrodes due to their tunable structures and sustainable preparation from abundant precursors in an environmentally friendly manner. Herein, hyperbranched polyphenylene (HBP) is synthesized through Suzuki polycondensation and investigated as a potential bipolar electrode for LIBs. The advantages of the hyperbranched architecture in HBP include easy and fast transportation of ions as an electrode. Brunauer–Emmett–Teller (BET) measurement on HBP reveals a high specific surface area and porosity compared with typical linear polymers. The low conductivity in HBP is improved by preparing an HBP/multiwalled carbon nanotube (MWCNT) composite material. The LIB performance for the HBP/MWCNT composite anode electrode shows good cyclic stability and high specific capacity, which are caused by the branching architecture, surface area, and improved electronic conductivity from the MWCNT. This results in easy access and rapid movement of Li ions for improved charge–discharge performance. The ex situ technique using Fourier transform infrared spectroscopy shows a lithium storage mechanism in the HBP electrode. This work shows extensive scope for using the hyperbranched architectural concept to explore and develop high-performing organic electrodes for future metal-ion batteries.

中文翻译：

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超支化聚苯撑作为锂离子电池的电极

聚合物电极因其可调节的结构和以环境友好的方式从丰富的前体中可持续制备而作为锂离子电池（LIB）电极的潜力引起了相当大的关注。在此，超支化聚亚苯基（HBP）是通过铃木缩聚反应合成的，并被研究作为 LIB 的潜在双极电极。HBP 中超支化结构的优点包括离子作为电极的简单快速传输。与典型的线性聚合物相比，Brunauer-Emmett-Teller (BET) 对 HBP 的测量显示出高比表面积和孔隙率。通过制备 HBP/多壁碳纳米管 (MWCNT) 复合材料来改善 HBP 的低电导率。HBP/MWCNT 复合阳极的 LIB 性能显示出良好的循环稳定性和高比容量，这是由 MWCNT 的支化结构、表面积和改善的电子电导率引起的。这导致锂离子易于接近和快速移动，以提高充放电性能。使用傅立叶变换红外光谱的非原位技术显示了 HBP 电极中的锂存储机制。这项工作展示了使用超支化架构概念探索和开发用于未来金属离子电池的高性能有机电极的广泛范围。这导致锂离子易于接近和快速移动，以提高充放电性能。使用傅立叶变换红外光谱的非原位技术显示了 HBP 电极中的锂存储机制。这项工作展示了使用超支化架构概念探索和开发用于未来金属离子电池的高性能有机电极的广泛范围。这导致锂离子易于接近和快速移动，以提高充放电性能。使用傅立叶变换红外光谱的非原位技术显示了 HBP 电极中的锂存储机制。这项工作展示了使用超支化架构概念探索和开发用于未来金属离子电池的高性能有机电极的广泛范围。