Liang Xiaojie, Liu Fangzhong, Yue Haonan, Dong Yaoyong, Chen Lijuan, Song Ting, Pei Yong, Wang Xianyou, Long Bei, Xiao Yao, Wu Xiongwei
School of Chemistry, Xiangtan University Xiangtan 411105 Hunan P. R. China
College of Intelligent Science and Engineering, Hunan Institute of Engineering Xiangtan 411104 Hunan P. R. China.
Chem Sci. 2025 Apr 5;16(19):8523-8531. doi: 10.1039/d5sc01210d. eCollection 2025 May 14.
Bismuth-based materials show promise for aqueous energy storage systems due to their unique layered structures and high storage capacity. Some bismuth-based materials have been applied to store Zn or NH , indicating that one bismuth-based compound may be innovatively used in both zinc-ion and ammonium-ion batteries (ZIBs and AIBs). Herein, we successfully design a poly(3,4-ethylenedioxythiophene) (PEDOT) coated and embedded BiTe (BiTe@PEDOT). Theoretical calculations and experimental studies demonstrate that the PEDOT coating and its intercalation into the interlayer enhance the structural stability of BiTe and significantly improve the storage capacities for Zn and NH . The PEDOT intercalation results in an increased interlayer spacing and a charge redistribution in the interlayer, facilitating charge transfer. Additionally, the insertion-type mechanism of Zn and NH in BiTe@PEDOT is revealed through tests. The optimized electrode (5 mg cm) exhibits high discharge capacities of 385 mA h g in ZIBs and 235 mA h g in AIBs at 0.2 A g and long-term cycle stability. BiTe@PEDOT performs robustly even at a high mass loading of 10 mg cm. BiTe@PEDOT//MnO (ZIBs) and BiTe@PEDOT//ZnMnO (AIBs) full cells offer high reversible capacities. This work provides a reference for designing bifunctional energy storage materials.
铋基材料因其独特的层状结构和高存储容量，在水系储能系统中展现出应用前景。一些铋基材料已被用于存储锌或铵，这表明一种铋基化合物可能被创新性地应用于锌离子电池和铵离子电池（ZIBs和AIBs）。在此，我们成功设计了一种聚（3,4-乙撑二氧噻吩）（PEDOT）包覆并嵌入的BiTe（BiTe@PEDOT）。理论计算和实验研究表明，PEDOT涂层及其插入层间增强了BiTe的结构稳定性，并显著提高了锌和铵的存储容量。PEDOT的插入导致层间距增加和层间电荷重新分布，促进了电荷转移。此外，通过测试揭示了BiTe@PEDOT中锌和铵的插入型机制。优化后的电极（5 mg cm）在0.2 A g时，在ZIBs中表现出385 mA h g的高放电容量，在AIBs中表现出235 mA h g的高放电容量，并具有长期循环稳定性。即使在10 mg cm的高质量负载下，BiTe@PEDOT也表现出良好的性能。BiTe@PEDOT//MnO（ZIBs）和BiTe@PEDOT//ZnMnO（AIBs）全电池具有高可逆容量。这项工作为设计双功能储能材料提供了参考。
