2D Solid-Electrolyte Interphase Built by High-Concentration Polymer Electrolyte for Highly Reversible Silicon Anodes

doi:10.1002/aenm.202303189

IMR OpenIR

	2D Solid-Electrolyte Interphase Built by High-Concentration Polymer Electrolyte for Highly Reversible Silicon Anodes
	Wang, Yuxiao 1,2; Li, Tianyu 1; Yang, Xiaofei 1; Yin, Qianwen 1,2; Wang, Shaogang 3; Zhang, Hongzhang 1; Li, Xianfeng 1
通讯作者	Yang, Xiaofei(yangxf@dicp.ac.cn) ; Zhang, Hongzhang(zhanghz@dicp.ac.cn) ; Li, Xianfeng(lixianfeng@dicp.ac.cn)
	2023-11-22
发表期刊	ADVANCED ENERGY MATERIALS
ISSN	1614-6832
页码	8
摘要	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
关键词	2D SEI high-concentration electrolyte silicon anodes solid-state electrolytes solvation structure
资助者	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
收录类别	SCI
语种	英语
资助项目	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研究方向	Chemistry ; Energy & Fuels ; Materials Science ; Physics
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001105570700001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177371
专题	中国科学院金属研究所
通讯作者	Yang, Xiaofei; Zhang, Hongzhang; Li, Xianfeng
作者单位	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
推荐引用方式 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.