上海交通大学梁正团队开发了一种用于快速稳定和可持续硅基阳极的，耐用和无害的超分子粘合剂。相关研究成果发表在2024年12月4日出版的《美国化学会杂志》。

在硅基阳极的反复体积变化过程中，粘合剂的机械疲劳会导致粘合剂网络崩溃，从而导致锂离子电池（LIBs）过早失效。

该文中，研究人员设计了一种无损伤的聚合物粘合剂，其具有机械互锁的网络，利用菊花链（DCMIN）和聚丙烯酸（PAA）来提高硅基阳极的结构内聚力。这个DCMIN@PAA粘合剂具有坚固的机械性能、高弹性和优异的粘附性。

更重要的是，装饰在线组件上的二烷基铵盐与苯并-24-冠-8的醚基之间的识别，为DCMIN@PAA粘合剂在快速消散能量和减少损伤累积方面发挥重要作用。因此，DCMIN@PAA纯硅阳极在1℃下，经过1050次循环后表现出高保留率和快速的速率响应（5℃）。

这个DCMIN@PAA粘合剂还提高了，使用纯硅阳极的自制袋式电池的循环稳定性。此外，水溶性DCMIN@PAA粘合剂能够快速释放和分离，可以促进报废阳极的回收，增强电池的可持续性。

该项工作强调了考虑粘合剂时能量耗散的必要性，并为稳定遭受体积变化引起的应力累积的硅基阳极，提供了一条可行的途径。

附：英文原文

Title: Durable and Damageless Supramolecular Binder for Fast, Stable, and Sustainable Si-Based Anodes

Author: Zhu Liu, Yongming Wang, Guoquan Liu, Xinyang Yue, Zhangqin Shi, Yihong Tan, Jun Zhao, Yu Lei, Xuzhou Yan, Zheng Liang

Issue&Volume: December 4, 2024

Abstract: Mechanical fatigue of the binders during the repeated volume change of Si-based anodes induces binder network collapse, resulting in lithium-ion batteries (LIBs) failing prematurely. Herein, we designed a damageless polymer binder with a mechanically interlocked network utilizing [an]daisy chains (DCMIN) and poly(acrylic acid) (PAA) to improve the structural cohesion of the Si-based anode. This DCMIN@PAA binder exhibits robust mechanical properties, high elasticity, and excellent adhesion. More importantly, the recognition between the dialkylammonium salt decorated on the thread component and the ether group of benzo-24-crown-8 provides efficacy for the DCMIN@PAA binder in quickly dissipating energy and reducing damage accumulation. Therefore, with the DCMIN@PAA binder, the pure-Si anode showcases high retention over 1050 cycles at 1 C and a fast rate response (5 C). The DCMIN@PAA binder also improves the cycling stability of the homemade pouch cell using a pure-Si anode. In addition, the water-soluble DCMIN@PAA binder, capable of quick release and separation, could facilitate recycling of the end-of-life anode, enhancing the sustainability of the battery. This work highlights the indispensability of energy dissipation with the consideration of a binder and provides a viable path forward to stabilize Si-based anodes suffering from volume change-induced stress accumulation.

DOI: 10.1021/jacs.4c11217

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.4c11217