Silicon Anode with High Initial Coulombic Efficiency by Modulated Trifunctional Binder for High‐Areal‐Capacity Lithium‐Ion Batteries

By Zeheng Li, Yaping Zhang, Tiefeng Liu, Xuehui Gao, Siyuan Li, M. Ling, Chengdu Liang, Jun‐chao Zheng, Zhan Lin. Advanced Energy Materials, 2020

352 citations recorded by the source corpus.

High‐capacity electrode materials play a vital role for high‐energy‐density lithium‐ion batteries. Silicon (Si) has been regarded as a promising anode material because of its outstanding theoretical capacity, but it suffers from an inherent volume expansion problem. Binders have demonstrated improvements in the electrochemical performance of Si anodes. Achieving ultrahigh‐areal‐capacity Si anodes with rational binder strategies remains a significant challenge. Herein, a binder‐lithiated strategy is proposed for ultrahigh‐areal‐capacity Si anodes. A hard/soft modulated trifunctional network binder (N‐P‐LiPN) is constructed by the partially lithiated hard polyacrylic acid as a framework and partially lithiated soft Nafion as a buffer via the hydrogen binding effect. N‐P‐LiPN has strong adhesion and mechanical properties to accommodate huge volume change of the Si anode. In addition, lithium‐ions are transferred via the lithiated groups of N‐P‐LiPN, which significantly enhances the ionic conductivity of the Si anode. Hence, the Si@N‐P‐LiPN electrodes achieve the highest initial Coulombic efficiency of 93.18% and a stable cycling performance for 500 cycles at 0.2 C. Specially, Si@N‐P‐LiPN electrodes demonstrate an ultrahigh‐areal‐capacity of 49.59 mAh cm−2. This work offers a new approach for inspiring the battery community to explore novel binders for next‐generation high‐energy‐density storage devices.

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

View Paper: https://www.semanticscholar.org/paper/472076e372d89364f096f0cde7e984df9138ffd6

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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, methodology): “(C) Schematic of the preparation of the N-P-LiPN binder.(96) Copyright 2020, WILEY-VCH.”