3D MXene-Based Flexible Network for High-Performance Pressure Sensor with a Wide Temperature Range.
3D MXene-Based Flexible Network for High-Performance Pressure Sensor with a Wide Temperature Range.
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DOI：
10.1002/advs.202205303
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发表时间：
2023-02
期刊：
影响因子：
15.1
通讯作者：
Nan, Ce-Wen
中科院分区：
文献类型：
--
作者：
Xie, Yimei;Cheng, Yongfa;Ma, Yanan;Wang, Jian;Zou, Junjie;Wu, Han;Yue, Yang;Li, Baowen;Gao, Yihua;Zhang, Xin;Nan, Ce-Wen
随着智能可穿戴设备的日益普及，各种复杂的应用场景迫切需要柔性压力传感器。现有柔性压力传感器面临的巨大挑战是在较宽的温度范围内保持高灵敏度，这对于其在恶劣环境中的应用至关重要。据报道，一种由均匀覆盖 MXene 纳米片的聚醚酰亚胺 (PEI) 纤维网络制成的柔性压阻传感器可构建导电通路，在 -5 °C（灵敏度为 80 kPa−1）至 150 °C (20 kPa−1) 的宽温度范围内表现出超高灵敏度，检测限低至 9 Pa，快速响应时间为 163 ms，出色的耐用性室温下 10 000 次循环，100 °C 下 2000 次循环，-5 °C 下 500 次循环。压力传感器可以实时监测人体的各种活动，应用于人机交互，测量压力分布。它还可以在 150°C 和极低温度（液氮中）下对外部机械刺激做出敏感反应。此外，纤维网络表现出优异的焦耳热性能，在12V的施加电压下可以达到78℃。因此，压阻传感器在恶劣温度条件下的可穿戴服装和个人加热应用中具有相当大的潜力。提出了一种基于 3D MXene/聚醚酰亚胺网络的高灵敏度压阻传感器。该传感器在-5 °C时80 kPa−1至150 °C时20 kPa−1的宽温度范围内表现出超高灵敏度，检测限低至9 Pa，在室温下超过10 000次循环、100 °C下2000次循环和-5 °C下500次循环具有出色的耐用性。
With the increasing popularity of smart wearable devices, flexible pressure sensors are highly desired in various complex application scenarios. A great challenge for existing flexible pressure sensors is to maintain high sensitivity over a wide temperature range, which is critical for their applications in harsh environments. Herein, a flexible piezoresistive sensor made of polyetherimide (PEI) fibrous network evenly covered with MXene nanosheets is reported to construct conductive pathways, showing ultrahigh sensitivity over a wide temperature range from −5 °C (sensitivity of 80 kPa−1) to 150 °C (20 kPa−1), low detection limit of 9 Pa, fast response time of 163 ms, outstanding durability over 10 000 cycles at room temperature, 2000 cycles at 100 °C and 500 cycles at −5 °C. The pressure sensor can monitor various human activities in real‐time, apply to human–machine interaction, and measure pressure distribution. It also can sensitively respond to external mechanical stimuli at 150 °C and extremely low temperature (in liquid nitrogen). Moreover, the fibrous network exhibits an excellent Joule heating performance, which can reach 78 °C at an applied voltage of 12 V. Thus, the piezoresistive sensor has considerable potential for wearable garments and personal heating applications in harsh temperature conditions. A highly‐sensitive piezoresistive sensor based on 3D MXene/polyetherimide network is proposed. The sensor exhibits ultrahigh sensitivity in a wide temperature range from 80 kPa−1 at −5 °C to 20 kPa−1 at 150 °C, low detection limit of 9 Pa, outstanding durability over 10 000 cycles at room temperature, 2000 cycles at 100 °C and 500 cycles at −5 °C.
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