Synergistic Superiority of a Silver‐Carbon Black‐Filled Conductive Polymer Composite for Temperature–Pressure Sensing,Advanced Engineering Materials

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Synergistic Superiority of a Silver‐Carbon Black‐Filled Conductive Polymer Composite for Temperature–Pressure Sensing
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-01-09 , DOI: 10.1002/adem.202001392
Gang Wang ₁ , Mingjiang Ouyang ₂ , Yifang Huang ₂ , Yining Huang ₃ , Zheng Yang ₁ , Bingkun Guo _{2,

3} , Jinbo Wu _{2,

3} , Mengying Zhang ₁ , Weijia Wen _{2,

4,

5}

Affiliation

Flexible conductive polymer composites (CPCs) are creating new opportunities in soft electronics and their applications. Compared with CPCs based on unary filler systems, CPCs with binary fillers have plenty of advantages in mechanical and electrical properties due to the synergistic superiority of fillers. Herein, a new kind of flexible binary fillers CPC composed of nano‐sized carbon black (CB) particles and micro‐sized silver (Ag) platelets uniformly dispersed in polydimethylsiloxane (PDMS) is reported and named Ag‐CB‐PDMS. A synergistic conductive network structure based on observation of scanning electron microscope (SEM) is proposed. The conductivity is approximately 20 times higher than that of unary filler system, with a threefold improvement in its stability. Through the regulation of the filler concentration, the temperature coefficient can be adjusted, and the resistance is insensitive to temperature when silver and carbon black concentrations are 15 and 18 wt%, respectively. Meanwhile, Ag‐CB‐PDMS retains good flexibility and shows excellent piezoresistive characteristics. During compression‐release cycles, Ag‐CB‐PDMS exhibits excellent stability, good repeatability (1000 cycles), and fast response time (52 ms). A temperature–pressure sensor is constructed based on Wheatstone bridge for real‐time monitoring of lithium‐ion batteries (LiBs) to achieve early safety warning.

中文翻译：

银-炭黑填充导电聚合物复合材料在温度-压力传感方面的协同优势

柔性导电聚合物复合材料（CPC）在软电子及其应用中创造了新的机遇。与基于一元填料系统的CPC相比，具有二元填料的CPC在机械和电气性能方面具有很多优势，这归因于填料的协同优势。本文报道了一种新型的柔性二元填料CPC，它由均匀分散在聚二甲基硅氧烷（PDMS）中的纳米级炭黑（CB）颗粒和微米级银（Ag）血小板组成，并命名为Ag-CB-PDMS。提出了一种基于扫描电镜观察的协同导电网络结构。电导率大约是一元填料体系的20倍，其稳定性提高了三倍。通过调节填料浓度，当银和炭黑的浓度分别为15和18 wt％时，温度系数可以调节，并且电阻对温度不敏感。同时，Ag-CB-PDMS保留了良好的柔韧性并显示出出色的压阻特性。在压缩释放周期中，Ag-CB-PDMS具有出色的稳定性，良好的重复性（1000个循环）和快速的响应时间（52毫秒）。基于惠斯通电桥构造的温度-压力传感器可对锂离子电池（LiB）进行实时监控，以实现早期安全预警。Ag‐CB‐PDMS具有出色的稳定性，良好的重复性（1000个循环）和快速的响应时间（52 ms）。基于惠斯通电桥构造的温度-压力传感器可对锂离子电池（LiB）进行实时监控，以实现早期安全预警。Ag‐CB‐PDMS具有出色的稳定性，良好的重复性（1000个循环）和快速的响应时间（52 ms）。基于惠斯通电桥构造的温度-压力传感器可对锂离子电池（LiB）进行实时监控，以实现早期安全预警。

更新日期：2021-01-09

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