Rational Design of a Multifunctional Binder for High-Capacity Silicon-Based Anodes

By P. Cao, Guang Yang, Bingrui Li, Yiman Zhang, Sheng Zhao, Shuo Zhang, Andrew Erwin, Zhengcheng Zhang, A. Sokolov, J. Nanda and 1 more. ACS Energy Letters, 2019

142 citations recorded by the source corpus.

Although several principles have been recognized to fabricate a nominal “better” binder, there continues to be a lack of a rational design and synthesis approach that would meet the robust criteria required for silicon (Si) anodes. Herein, we report a synthetic polymer binder, i.e., catechol-functionalized chitosan cross-linked by glutaraldehyde (CS-CG+GA), that serves dual functionalities: (a) wetness-resistant adhesion capability via catechol grafting and (b) mechanical robustness via in situ formation of a three-dimensional (3D) network. A SiNP-based anode with a designed functional polymer network (CS-CG10%+6%GA) exhibits a capacity retention of 91.5% after 100 cycles (2144 ± 14 mAh/g). Properties that are traditionally considered to be advantageous, including stronger adhesion strength and higher mechanical robustness, do not always improve the binder performance. A clear relationship between these properties and ultimate electrochemical performance is established by assessing the rheological behavio...

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/81f38cd4e6f36fe632d026a3b8afb4e4f52ca1f1

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In Electrical and Electronic Engineering

1. Sen Xin
2. Yu‐Guo Guo
3. Qiang Zhang
4. Ya‐Xia Yin
5. Xin‐Bing Cheng
6. Jia-qi Huang
7. Arumugam Manthiram

In Electronic, Optical and Magnetic Materials

1. Sen Xin
2. Yu‐Guo Guo

Citations in the corpus

• Advances of polymer binders for silicon‐based anodes in high energy density lithium‐ion batteries (2021, background): “reported a catechol functionalized and GA crosslinked chitosan (CS-CG + GA) binder for SiNP anodes (Figure 13A).(145) The optimized networking CS-CG10% + 6%GA binder showed the most improved peeling force and the best cycling performance of SiNP anodes.”