期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 926, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2022.116935
关键词
UiO-67; PVB; PVDF-HFP; Solid composite electrolytes (SCEs); All solid-state lithium-ion batteries (ASSLBs)
资金
- National Natural Science Foundation of China
- [21701083]
The study demonstrates the use of PVB additives to enhance the performance of solid composite electrolytes, leading to the successful preparation of SCE with excellent electrochemical properties. This work is important for advancing the development of all solid-state batteries.
All solid-state lithium-ion batteries (ASSLBs) are thought to benefit from using solid composite electrolytes (SCEs) to increase their energy density and safety. In this study, we firstly introduce the PVB additives to SCEs and prepared a SCE composed of a mixture of nanostructured MOFs (UiO-67), PVDF-HFP, PVB, and LiTFSI. Electrochemical characterizations of the SCEs (EIS, LSV, CV and battery test) were also conducted. The SCE UBP-2 (PVB:PVDF-HFP = 1:10) shows a high lithium-ion transference number (tLi+ =0.72) and good ionic conductivity (3.27x10-4 S cm-1 at 60 degrees C). A symmetric Li cell with SCE UBP-2 can be continuously cycled at 0.1 mA cm-2 for more than 2500 h without experiencing a short circuit. The full cell (LiFePO4/ UBP-2/Li) also maintained a high reversible discharge capacity of 154.9 mAh g-1 at 0.1C after 200 cycles at 60 degrees C. At 3C, a capacity of around 100 mAh g-1 was also achieved. This work might help to enhance the development of the forthcoming all solid-state batteries.
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