a) BFC on the socks showing the response of lactase for wearable self‐powered sensors during exercise. b) Schematic diagram of the integrated “scavenge‐sense‐display” system for textile BFC. c) Real‐time performances of a stretchable BFC. d) Real‐time scavenging of electrical energy by stretchable BFC in a human subject. e) Schematic of a sensor array (top: urea and NH4
+, bottom: glucose and pH) for simultaneous monitoring of various analytes in sweat. f–h) Schematic representation of perspiration‐powered electronic skin (PPES) for remote human–machine interaction and the PPES integrated with strain sensors. i) Sweat‐based energy storage with hybrid integration of solar cell and chemiresistive sensor for sweat salinity analysis. j) The performance of sweat salinity sensors using sweat electrolyte‐based supercapacitor. a,b) Reproduced with permission.[
189
] Copyright 2016, Royal Society of Chemistry. c,d) Adapted with permission.[
77
] Copyright 2017, Royal Society of Chemistry. e–h) Adapted with permission.[
40
] Copyright 2020, The Authors, published by AAAS. j) Reproduced under the terms of the CC‐BY Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0).[
35
] Copyright 2020, The Authors, published by Wiley‐VCH.