SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries

doi:10.1002/aenm.201800434

	SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries
	Guo, Songtao ; Li, Heng 1,2; Li, Yaqian ; Han, Yong 3,4; Chen, Kebei 5; Xu, Gengzhao 5; Zhu, Yingjie 1,2; Hu, Xianluo
刊名	ADVANCED ENERGY MATERIALS
	2018
卷号	8 期号:24
关键词	binder interfacial adhesion konjac glucomannan lithium-ion batteries silicon anodes
ISSN号	1614-6832
DOI	10.1002/aenm.201800434
英文摘要	Silicon-based anodes with high theoretical capacity have intriguing potential applications for next-generation high-energy lithium-ion batteries, but suffer from huge volumetric change that causes pulverization of electrodes. Rational design and construction of effective electrode structures combined with versatile binders remain a significant challenge. Here, a unique natural binder of konjac glucomannan (KGM) is developed and an amorphous protective layer of SiO2 is fabricated on the surface of Si nanoparticles (Si@SiO2) to enhance the adhesion. Benefiting from a plethora of hydroxyl groups, the KGM binder with inherently high adhesion and superior mechanical properties provides abundant contact sites to active materials. Molecular mechanics simulations and experimental results demonstrate that the enhanced adhesion between KGM and Si@SiO2 can bond the particles tightly to form a robust electrode. In addition to bridging KGM molecules, the SiO2-functionalized surface may serve as a buffer layer to alleviate the stresses of Si nanoparticles resulting from the volume change. The as-fabricated KGM/Si@SiO2 electrode exhibits outstanding structural stability upon long-term cycles. A highly reversible capacity of 1278 mAh g(-1) can be achieved over 1000 cycles at a current density of 2 A g(-1), and the capacity decay is as small as 0.056% per cycle.
学科主题	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000442731100003
资助机构	S.T.G. and H.L. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (Nos. 51772116, 51522205, and 51472098), Ministry of Science and Technology of the People's Republic of China (2015AA034601), and the fund for Academic Frontier Youth Team of HUST. The authors thank Analytical and Testing Center of HUST for XRD, SEM, TEM measurements, etc. Y.H. was supported for this work by the U.S. Department of Energy (USDOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. His work was performed at Ames Laboratory which is operated by Iowa State University under Contract No. DE-AC02-07CH111358. ; S.T.G. and H.L. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (Nos. 51772116, 51522205, and 51472098), Ministry of Science and Technology of the People's Republic of China (2015AA034601), and the fund for Academic Frontier Youth Team of HUST. The authors thank Analytical and Testing Center of HUST for XRD, SEM, TEM measurements, etc. Y.H. was supported for this work by the U.S. Department of Energy (USDOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. His work was performed at Ames Laboratory which is operated by Iowa State University under Contract No. DE-AC02-07CH111358.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24719]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA 5.Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA 6.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China
推荐引用方式 GB/T 7714	Guo, Songtao,Li, Heng,Li, Yaqian,et al. SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries[J]. ADVANCED ENERGY MATERIALS,2018,8(24).
APA	Guo, Songtao.,Li, Heng.,Li, Yaqian.,Han, Yong.,Chen, Kebei.,...&Hu, Xianluo.(2018).SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries.ADVANCED ENERGY MATERIALS,8(24).
MLA	Guo, Songtao,et al."SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries".ADVANCED ENERGY MATERIALS 8.24(2018).