biostudies-literatureUnknown14(10)Bai YPolymer electrodes are drawing widespread attention to the future generation of lithium-ion battery materials. However, weak electrochemical performance of organic anode materials still exists, such as low capacity, low rate performance, and low cyclability. Herein, we successfully constructed a donor-acceptor thiophene-based polymer (PBT-1) by introducing an organoboron unit. The charge delocalization and lower LUMO energy level due to the unique structure enabled good performance in electrochemical tests with a reversible capacity of 405 mA h g^-1 at 0.5 A g^-1 and over 10 000 cycles at 1 A g^-1. Moreover, electron paramagnetic resonance (EPR) spectra revealed that the unique stable spin system in the PBT-1 backbone during cycling provides a fundamental explanation for the highly stable electrochemical performance. This work offers a reliable reference for the design of organic anode materials and expands the potential application directions of organoboron chemistry.RSC advances7215-7220https://www.ebi.ac.uk/biostudies/studies/S-EPMC10901214biostudies-literatureOrganoboron-thiophene-based polymer electrodes for high-performance lithium-ion batteries.PMC10901214Peng HPan XZhou LBai YLiu TFan QZhao HfalseOrganoboron-thiophene-based polymer electrodes for high-performance lithium-ion batteries.Polymer electrodes are drawing widespread attention to the future generation of lithium-ion battery materials. However, weak electrochemical performance of organic anode materials still exists, such as low capacity, low rate performance, and low cyclability. Herein, we successfully constructed a donor-acceptor thiophene-based polymer (PBT-1) by introducing an organoboron unit. The charge delocalization and lower LUMO energy level due to the unique structure enabled good performance in electrochemical tests with a reversible capacity of 405 mA h g^-1 at 0.5 A g^-1 and over 10 000 cycles at 1 A g^-1. Moreover, electron paramagnetic resonance (EPR) spectra revealed that the unique stable spin system in the PBT-1 backbone during cycling provides a fundamental explanation for the highly stable electrochemical performance. This work offers a reliable reference for the design of organic anode materials and expands the potential application directions of organoboron chemistry.2024-01-01T00:00:00Z2024 Feb2025-04-22T06:40:49.991Z2025-04-05T21:48:46.11ZS-EPMC109012143841968010.1039/d3ra06060h