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采用Zwitterionic粘合剂设计的接口可实现抗粉碎和长周期无电池
Xuedi Wang1, Li Li1, Xiaohu Qian1
1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 23, 2025
概括
通过防止降解和稳定接口,新的zwitterionic粘合剂策略显著改善了无阳极电池 (AFZB),从而实现了长时间的高性能能量存储.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 无阳极电池 (AFZB) 承诺高能量密度,但面临诸如粉碎和树突生长等挑战,限制循环寿命.
- 现有的解决方案往往无法在电化学循环过程中提供全面的阳极稳定.
研究的目的:
- 开发一种新聚合物粘合剂 (ZPB) 策略,以抑制粉碎和稳定AFZB中的电极-电解质接口.
- 在无金属阳极电池系统中建立zwitterionic结合物的结构-功能-性能相关性.
主要方法:
- 在阳极中加入一个合理设计的基聚合物粘合剂 (ZPB).
- 工程阳极的机械强度和离子流量分布的描述.
- 在不对称的电池中评估涂/剥离库伦比效率 (CEs).
- 测试完全没有阳极的电池 (ZPB/C@CuidiyeNVO) 的循环稳定性和容量保留.
主要成果:
- 采用ZPB的策略使阳极具有增强的机械强度和均的离子流分布.
- 通过粘弹性应力消散,Zwitterionic架构有效地减轻了沉积引起的体积变化.
- 在不对称的电池中实现了99.5%的令人印象深刻的Coulombic效率 (CE).
- 在充满电池时表现出显著的循环稳定性,在2 A g-1时保持超过1000个循环后的86%容量.
结论:
- 采用zwitterionic粘合剂策略,可提高无阳极电池的性能和稳定性的可扩展设计.
- 这项工作确立了zwitterionic分子设计与实用电池应用的界面稳定机制之间的明确相关性.
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