Liang Yi, Yang Lili, Zhang Jiali, Zhong Min, Lei Puyi, Zhao Qian, Wang Lei, Shen Wenzhuo, Guo Shouwu
Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
ACS Appl Mater Interfaces. 2025 Mar 19;17(11):16747-16757. doi: 10.1021/acsami.4c18304. Epub 2025 Mar 9.
Although many protocols have been developed to enhance the ionic conductivity and lithium-ion transference numbers of the solid polymer electrolyte, it is still challenging to improve them simultaneously. Herein, we design and prepare boron-doped graphene (BG) as an anion trapper and blend it within a poly(ethylene oxide) (PEO)-based electrolyte. The well-dispersed BG sheets can reduce the crystallinity of PEO and afford numerous Lewis acid sites to effectively accelerate the dissociation of the lithium salt and trap the anions. Thus, the PEO-based electrolytes containing BG sheets exhibit a high ionic conductivity of 9.27 × 10 S cm and lithium-ion transference number of 0.57 at 25 °C, which ensure the stable Li stripping/plating over 1000 h. The all-solid-state lithium-ion batteries assembled with the as-prepared electrolyte show excellent rate performance and cycling stability at 25 °C.
尽管已经开发了许多协议来提高固体聚合物电解质的离子电导率和锂离子迁移数，但要同时提高它们仍然具有挑战性。在此，我们设计并制备了硼掺杂石墨烯（BG）作为阴离子捕获剂，并将其与聚环氧乙烷（PEO）基电解质混合。分散良好的BG片可以降低PEO的结晶度，并提供大量路易斯酸位点，以有效加速锂盐的解离并捕获阴离子。因此，含有BG片的PEO基电解质在25°C下表现出9.27×10 S cm的高离子电导率和0.57的锂离子迁移数，这确保了在1000小时以上的稳定锂剥离/电镀。用所制备的电解质组装的全固态锂离子电池在25°C下表现出优异的倍率性能和循环稳定性。
