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Title: Interweaving 3D Network Binder for High-Areal-Capacity Si Anode through Combined Hard and Soft Polymers

Journal Article · · Advanced Energy Materials
 [1];  [2];  [2];  [3];  [4]; ORCiD logo [5]
  1. Guangdong University of Technology, Guangzhou (China); Griffith University, QLD (Australia)
  2. Queensland University of Technology(QUT), Brisbane, QLD (Australia)
  3. Griffith University, QLD (Australia)
  4. Guangdong University of Technology, Guangzhou (China)
  5. Argonne National Lab. (ANL), Lemont, IL (United States)
+ Show Author Affiliations

We report that Si anodes suffer an inherent volume expansion problem. The consensus is that hydrogen bonds in these anodes are preferentially constructed between the binder and Si powder for enhanced adhesion and thus can improve cycling performance. There has been little research done in the field of understanding the contribution of the binder's mechanical properties to performance. Herein, a simple but effective strategy is proposed, combining hard/soft polymer systems, to exploit a robust binder with a 3D interpenetrating binding network (3D-IBN) via an in situ polymerization. The 3D-IBN structure is constructed by interweaving a hard poly(furfuryl alcohol) as the skeleton with a soft polyvinyl alcohol (PVA) as the filler, buffering the dramatic volume change of the Si anode. The resulting Si anode delivers an areal capacity of >10 mAh cm-2 and enables an energy density of >300 Wh kg-1 in a full lithium-ion battery (LIB) cell. The component of the interweaving binder can be switched to other polymers, such as replacing PVA by thermoplastic polyurethane and styrene butadiene styrene. Such a strategy is also effective for other high-capacity electroactive materials, e.g., Fe2O3 and Sn. In conclusion, this finding offers an alternative approach in designing high-areal-capacity electrodes through combined hard and soft polymer binders for high-energy-density LIBs.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Australian Research Council; National Natural Science Foundation of China (NSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1529547
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 3 Vol. 9; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Synthesis of Interpenetrating Polymer Networks Based on Triisocyanate-Terminated and Modified Poly(urethane-imide) with Superior Mechanical Properties journal March 2020
A Facile, One-Step Synthesis of Silicon/Silicon Carbide/Carbon Nanotube Nanocomposite as a Cycling-Stable Anode for Lithium Ion Batteries journal November 2019
Uniform Distribution of Alloying/Dealloying Stress for High Structural Stability of an Al Anode in High‐Areal‐Density Lithium‐Ion Batteries journal February 2019
Trifunctional Electrode Additive for High Active Material Content and Volumetric Lithium-Ion Electrode Densities journal January 2019
Porous Si@SiO x @N‐Rich Carbon Nanofibers as Anode in Lithium‐Ion Batteries under High Temperature journal August 2019
3D Network Binder via In Situ Cross‐Linking on Silicon Anodes with Improved Stability for Lithium‐Ion Batteries journal December 2019
Hollow-sphere iron oxides exhibiting enhanced cycling performance as lithium-ion battery anodes journal January 2019
One-pot solution synthesis of carbon-coated silicon nanoparticles as an anode material for lithium-ion batteries journal January 2020
New insights into Li diffusion in Li–Si alloys for Si anode materials: role of Si microstructures journal January 2019
A Facile, One-Step Synthesis of Silicon/Silicon Carbide/Carbon Nanotube Nanocomposite as a Cycling-Stable Anode for Lithium Ion Batteries journal November 2019

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Related Subjects

36 MATERIALS SCIENCE
3D network binders
Si anodes
hard and soft polymers
high areal capacity
lithium-ion batteries