| 2D Solid-Electrolyte Interphase Built by High-Concentration Polymer Electrolyte for Highly Reversible Silicon Anodes | |
| Wang, Yuxiao1,2; Li, Tianyu1; Yang, Xiaofei1; Yin, Qianwen1,2; Wang, Shaogang3; Zhang, Hongzhang1; Li, Xianfeng1 | |
| Corresponding Author | Yang, Xiaofei(yangxf@dicp.ac.cn) ; Zhang, Hongzhang(zhanghz@dicp.ac.cn) ; Li, Xianfeng(lixianfeng@dicp.ac.cn) |
| 2023-11-22 | |
| Source Publication | ADVANCED ENERGY MATERIALS
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| ISSN | 1614-6832 |
| Pages | 8 |
| Abstract | Silicon anodes with a high capacity of 4200 mAh g-1 and a low potential of 0.3 V (vs Li+/Li) enable lithium-ion batteries with improved energy density. However, the thickened 3D solid-electrolyte interphase (SEI) formation on Si particles in the liquid electrolytes consumes the electrolyte/active Si and blocks the Li+/e- transport, resulting in fast capacity fading. Herein, a high-concentration polymer electrolyte (HCPE) is designed to build 2D SEI on the Si anode surface instead of the particles, which accommodates the volume change and maintains the continuous Li+/e- transport pathways as well. The retarding effect of NO3- lowers the polymerization rate of 1,3-dioxolane (DOL), enabling 6 m LiFSI dissolution. The high concentration of LiFSI takes part in constructing the solvation structure and pulls the DOL away, reducing the decomposition of DOL and poly-DOL (PDOL) and inducing the generation of a LiF- and Li3N-rich SEI with high mechanical strength and fast Li+ transport capability. As a result, the cell using HCPE delivers a high capacity of 1765 mAh g-1 at 2C and maintains a high capacity of 2000 mAh g-1 after 100 cycles at 0.2C, which is superior to that of a liquid electrolyte (617 mAh g-1) and a low-concentration polymer electrolyte (45 mAh g-1). A high-concentration polymer electrolyte (HCPE) with low flowability and high ionic conductivity is developed by retarding the ring-opening polymerization of 1,3-dioxolane (DOL) with a LiNO3 additive. The increased concentration of LiFSI in HCPE reduces the decomposition of DOL and helps induce the formation of a 2D inorganic-rich solid-electrolyte interphase, which accommodates the volume change and maintains the continuous Li+/e- transport pathways as well.image |
| Keyword | 2D SEI high-concentration electrolyte silicon anodes solid-state electrolytes solvation structure |
| Funding Organization | Y.W. and T.L. contributed equally to this work. This work was partly supported by the CAS Project of Young Scientists in Basic Research (No. YSBR-058), the National Natural Science Foundation of China (No. 22279135), the Outstanding Youth Foundation of Lia ; CAS Project of Young Scientists in Basic Research ; National Natural Science Foundation of China ; Outstanding Youth Foundation of Liaoning Province ; Dalian Science and Technology Innovation Fund |
| DOI | 10.1002/aenm.202303189 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Y.W. and T.L. contributed equally to this work. This work was partly supported by the CAS Project of Young Scientists in Basic Research (No. YSBR-058), the National Natural Science Foundation of China (No. 22279135), the Outstanding Youth Foundation of Lia[YSBR-058] ; CAS Project of Young Scientists in Basic Research[22279135] ; National Natural Science Foundation of China[2023JH3/10200019] ; Outstanding Youth Foundation of Liaoning Province[2023JJ11CG004] ; Dalian Science and Technology Innovation Fund |
| WOS Research Area | Chemistry ; Energy & Fuels ; Materials Science ; Physics |
| WOS Subject | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:001105570700001 |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/177371 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, Xiaofei; Zhang, Hongzhang; Li, Xianfeng |
| Affiliation | 1.Chinese Acad Sci, Div Energy Storage, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Yuxiao,Li, Tianyu,Yang, Xiaofei,et al. 2D Solid-Electrolyte Interphase Built by High-Concentration Polymer Electrolyte for Highly Reversible Silicon Anodes[J]. ADVANCED ENERGY MATERIALS,2023:8. |
| APA | Wang, Yuxiao.,Li, Tianyu.,Yang, Xiaofei.,Yin, Qianwen.,Wang, Shaogang.,...&Li, Xianfeng.(2023).2D Solid-Electrolyte Interphase Built by High-Concentration Polymer Electrolyte for Highly Reversible Silicon Anodes.ADVANCED ENERGY MATERIALS,8. |
| MLA | Wang, Yuxiao,et al."2D Solid-Electrolyte Interphase Built by High-Concentration Polymer Electrolyte for Highly Reversible Silicon Anodes".ADVANCED ENERGY MATERIALS (2023):8. |
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