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Vol. 13 (2021)

Highly Sensitive Pseudocapacitive Iontronic Pressure Sensor with Broad Sensing Range

https://doi.org/10.1007/s40820-021-00664-w
Libo Gao
School of Mechano‑Electronic Engineering, Xidian University, Xian 710071, Shaanxi, P. R. China
Meng Wang
School of Mechano‑Electronic Engineering, Xidian University, Xian 710071, Shaanxi, P. R. China
Weidong Wang
School of Mechano‑Electronic Engineering, Xidian University, Xian 710071, Shaanxi, P. R. China
Hongcheng Xu
School of Mechano‑Electronic Engineering, Xidian University, Xian 710071, Shaanxi, P. R. China
Yuejiao Wang
Department of Mechanical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, P. R. China
Haitao Zhao
Materials Interfaces Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, P. R. China
Ke Cao
School of Mechano‑Electronic Engineering, Xidian University, Xian 710071, Shaanxi, P. R. China
Dandan Xu
School of Mechano‑Electronic Engineering, Xidian University, Xian 710071, Shaanxi, P. R. China
Lei Li
State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, No. 28, Xianning West Road, Xian 710049, Shaanxi, P. R. China

Corresponding Author: Lei Li

l-li@xjtu.edu.cn

Nano-Micro Letters, Vol. 13 (2021), Article Number: 140

Abstract

Flexible pressure sensors are unprecedentedly studied on monitoring human physical activities and robotics. Simultaneously, improving the response sensitivity and sensing range of flexible pressure sensors is a great challenge, which hinders the devices’ practical application. Targeting this obstacle, we developed a Ti3C2Tx-derived iontronic pressure sensor (TIPS) by taking the advantages of the high intercalation pseudocapacitance under high pressure and rationally designed structural configuration. TIPS achieved an ultrahigh sensitivity (Smin > 200 kPa−1, Smax > 45,000 kPa−1) in a broad sensing range of over 1.4 MPa and low limit of detection of 20 Pa as well as stable long-term working durability for 10,000 cycles. The practical application of TIPS in physical activity monitoring and flexible robot manifested its versatile potential. This study provides a demonstration for exploring pseudocapacitive materials for building flexible iontronic sensors with ultrahigh sensitivity and sensing range to advance the development of high-performance wearable electronics.


Highlights:


1 The iontronic pressure sensor achieved an ultrahigh sensitivity (Smin > 200 kPa−1, Smax > 45,000 kPa−1).
2 The iontronic pressure sensor exhibited a broad sensing range of over 1.4 MPa.
3 Pseudocapacitive iontronic pressure sensor using MXene was proposed.

Keywords

Iontronic sensor Flexible electronics Pressure sensor Pseudocapacitance Ti3C2Tx MXene
Gao, Libo, Meng Wang, Weidong Wang, Hongcheng Xu, Yuejiao Wang, Haitao Zhao, Ke Cao, Dandan Xu, and Lei Li. 2021. “Highly Sensitive Pseudocapacitive Iontronic Pressure Sensor With Broad Sensing Range”. Nano-Micro Letters 13 (June):140. https://doi.org/10.1007/s40820-021-00664-w.
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