Liu Chang, Huang Xin, Yu Xiaomeng, Wang Zhaoqi, Shen Yun, Yuan Shouyi, Wang Yonggang
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, China.
National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering Kunming, Kunming University of Science and Technology, Kunming, 650093, P. R. China.
Angew Chem Int Ed Engl. 2025 Jan 27;64(5):e202415915. doi: 10.1002/anie.202415915. Epub 2025 Jan 9.
Polymer-based organic electrodes for rechargeable batteries are attractive due to their design flexibility, sustainability, and environmental compatibility. Unfortunately, waste management of conventional polymer materials typically involves incineration, which emits greenhouse gases. Consequently, degradable polymers should be ideal candidates for future green batteries. However, to date, degradable polymer electrodes have been rarely reported. The few that have been developed exhibit very low capacities (<40 mAh g) and poor cycle stability (<100 cycles). Herein, we synthesize a degradable polymer cathode for lithium batteries by copolymerizing 2,3-dihydrofuran with TEMPO-containing norbornene derivatives. This polymer cathode demonstrates a two-electron redox reaction charge storage mechanism, exhibiting a high reversible capacity of 100.4 mAh g and a long cycle life of over 1000 cycles. Furthermore, under a mild acidic environment, this polymer electrode material undergoes complete decomposition via the hydrolysis of enol ethers, confirmed by gel permeation chromatography and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. These encouraging results shed light on the design of degradable polymer electrodes.
用于可充电电池的聚合物基有机电极因其设计灵活性、可持续性和环境兼容性而备受关注。不幸的是，传统聚合物材料的废物管理通常涉及焚烧，会排放温室气体。因此，可降解聚合物应是未来绿色电池的理想候选材料。然而，迄今为止，可降解聚合物电极鲜有报道。少数已开发的可降解聚合物电极表现出非常低的容量（<40 mAh g）和较差的循环稳定性（<100次循环）。在此，我们通过将2,3 - 二氢呋喃与含TEMPO的降冰片烯衍生物共聚，合成了一种用于锂电池的可降解聚合物阴极。这种聚合物阴极展示了一种双电子氧化还原反应电荷存储机制，具有100.4 mAh g的高可逆容量和超过1000次循环的长循环寿命。此外，在温和的酸性环境下，这种聚合物电极材料通过烯醇醚的水解完全分解，这通过凝胶渗透色谱法和基质辅助激光解吸/电离飞行时间质谱法得到证实。这些令人鼓舞的结果为可降解聚合物电极的设计提供了思路。
