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Crystalline Electrolyte Boosts High Performance of All-Solid-State Lithium-Ion Batteries
Nano Letters ( IF 9.6 ) Pub Date : 2024-11-14 , DOI: 10.1021/acs.nanolett.4c03874
Junfeng Luo, Yi Chang, Jing-Wen Shi, Xiaojin Wang, Haiqi Huang, Yuanyuan Zhang, Xiaowei Wang, Jiafeng Zhang, Yu-Xi Huang, Ruirui Zhao

The rigid solid–solid contact at the interface between the solid electrolyte and electrodes in full-solid-state lithium-ion batteries (ASSBs) presents a considerable challenge to lithium ion transport. To address this, we propose using Li-concentrated succinonitrile (Li-SN45) as an efficient bilateral interface modifier in ASSBs. This material boasts exceptional ionic conductivity of 3.38 mS cm–1 and excellent corrosion resistance to the Li metal anode. The assembled ASSBs using layered cathodes and Li metal demonstrate outstanding discharge capacity (170 mAh g–1 @ 20 mA g–1) and superior long-term cycling performance (97% capacity retention after 100 cycles). MALDI-TOF results suggest the formation of a crystalline structure in Li-SN45, which facilitates smooth “anion-free” Li+ hopping paths assisted by the oxygen atoms, as revealed by the solved crystal structure. Our findings enriched the understanding of Li transport dynamics in electrolytes of ASSBs, paving the way to designing superior next-generation ASSBs with fast Li transport.

中文翻译:


晶体电解质提高全固态锂离子电池的高性能



在全固态锂离子电池 (ASSB) 中,固体电解质和电极之间界面处的刚性固-固接触对锂离子传输提出了相当大的挑战。为了解决这个问题,我们建议使用 Li-concentrated succinonikyle (Li-SN45) 作为 ASSBs 中的有效双侧界面修饰剂。这种材料具有 3.38 mS cm–1 的出色离子电导率和对锂金属负极的出色耐腐蚀性。使用分层阴极和锂金属组装的 ASSB 表现出出色的放电容量 (170 mAh g–1 @ 20 mA g–1) 和卓越的长期循环性能(100 次循环后 97% 的容量保持)。MALDI-TOF 结果表明,在 Li-SN45 中形成了晶体结构,这有助于在氧原子的辅助下实现平滑的“无阴离子”Li+ 跳跃路径,如解析的晶体结构所示。我们的研究结果丰富了对 ASSBs 电解质中锂转运动力学的理解,为设计具有快速锂转运的下一代 ASSB 铺平了道路。
更新日期:2024-11-14
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