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Title: SiO 2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries

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. In this paper, a unique natural binder of konjac glucomannan (KGM) is developed and an amorphous protective layer of SiO 2 is fabricated on the surface of Si nanoparticles (Si@SiO 2) 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@SiO 2 can bond the particles tightly to form a robust electrode. In addition to bridging KGM molecules, the SiO 2-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@SiO 2 electrode exhibits outstanding structural stability upon long-term cycles. Finally, 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 smallmore » as 0.056% per cycle.« less
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [4] ;  [5] ; ORCiD logo [1]
  1. Huazhong Univ. of Science and Technology, Wuhan (China). State Key Lab. of Materials Processing and Die & Mould Technology. School of Materials Science and Engineering
  2. Huazhong Univ. of Science and Technology, Wuhan (China). State Key Lab. of Materials Processing and Die & Mould Technology. School of Materials Science and Engineering; Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics. State Key Lab. of High Performance Ceramics and Superfine Microstructure; Univ. of Chinese Academy of Sciences, Beijing (China)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  4. Chinese Academy of Sciences (CAS), Suzhou (China). Suzhou Inst. of Nano-Tech and Nano-Bionics
  5. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Inst. of Ceramics. State Key Lab. of High Performance Ceramics and Superfine Microstructure; Univ. of Chinese Academy of Sciences, Beijing (China)
Publication Date:
Report Number(s):
IS-J-9570
Journal ID: ISSN 1614-6832
Grant/Contract Number:
AC02-07CH11358; 51772116; 51522205; 51472098; 2015AA034601
Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 24; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Research Org:
Ames Lab. and Iowa State Univ., Ames, IA (United States); Huazhong Univ. of Science and Technology, Wuhan (China); Chinese Academy of Sciences (CAS), Shanghai (China); Chinese Academy of Sciences (CAS), Suzhou (China)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC); Ministry of Science and Technology of the People's Republic of China
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; binder; interfacial adhesion; konjac glucomannan; lithium-ion batteries; silicon anodes
OSTI Identifier:
1459534
Alternate Identifier(s):
OSTI ID: 1457194

Guo, Songtao, Li, Heng, Li, Yaqian, Han, Yong, Chen, Kebei, Xu, Gengzhao, Zhu, Yingjie, and Hu, Xianluo. SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries. United States: N. p., Web. doi:10.1002/aenm.201800434.
Guo, Songtao, Li, Heng, Li, Yaqian, Han, Yong, Chen, Kebei, Xu, Gengzhao, Zhu, Yingjie, & Hu, Xianluo. SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries. United States. doi:10.1002/aenm.201800434.
Guo, Songtao, Li, Heng, Li, Yaqian, Han, Yong, Chen, Kebei, Xu, Gengzhao, Zhu, Yingjie, and 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". United States. doi:10.1002/aenm.201800434.
@article{osti_1459534,
title = {SiO2-Enhanced Structural Stability and Strong Adhesion with a New Binder of Konjac Glucomannan Enables Stable Cycling of Silicon Anodes for Lithium-Ion Batteries},
author = {Guo, Songtao and Li, Heng and Li, Yaqian and Han, Yong and Chen, Kebei and Xu, Gengzhao and Zhu, Yingjie and Hu, Xianluo},
abstractNote = {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. In this paper, 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. Finally, 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.},
doi = {10.1002/aenm.201800434},
journal = {Advanced Energy Materials},
number = 24,
volume = 8,
place = {United States},
year = {2018},
month = {6}
}