Triphenylamine‐Based Conjugated Microporous Polymers as the Next Generation Organic Cathode Materials
Kamran Amin, Benjamin C. Baker, Long Pan, Warisha Mehmood, Hao Zhang, Raziq Nawaz, Zhixiang Wei, Charl F. J. Faul
Abstract
Abstract This paper presents a study on a novel porous polymer based on triphenylamine (LPCMP) as an excellent cathode material for lithium‐ion batteries. Through structural design and a scalable post‐synthesis approach, improvements in intrinsic conductivity, practical capacity, and redox potential in an organic cathode material is reported. The designed cathode achieves a notable capacity of 146 mAh g⁻¹ with an average potential of 3.6 V, using 70% active material content in the electrode. Additionally, through appropriate structural design, the capacity can increase to 160 mAh g −1 . Even at a high current density of 20 A g⁻¹ (360C), the cathode maintains a capacity of 74 mAh g⁻¹, enabling full charge within 10 s. A high specific energy density of 569 Wh kg⁻¹ (at 0.1 A g⁻¹) is combined with a very high power density of 94.5 kW kg⁻¹ (at 20 A g⁻¹ corresponding to a specific energy density of 263 Wh kg⁻¹) surpassing the power density of graphene‐based supercapacitors. It exhibits highly stable cyclic performance across various current densities, retaining almost 95% of its initial capacity after 1000 cycles at 5.5C. This work presents a significant breakthrough in developing high‐capacity, high‐potential organic materials for sustainable, high‐energy, and high‐power lithium‐ion batteries.