From industrially weavable and knittable highly conductive yarns to large wearable energy storage textiles

Yan Huang, Hong Hu, Yang Huang, Minshen Zhu, Wenjun Meng, Chang Liu, Zengxia Pei, Chonglei Hao, Zuankai Wang, Chunyi Zhi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

321 Citations (Scopus)

Abstract

Wearable electronic textiles that store capacitive energy are a next frontier in personalized electronics. However, the lack of industrially weavable and knittable conductive yarns in conjunction with high capacitance, limits the wide-scale application of such textiles. Here pristine soft conductive yarns are continuously produced by a scalable method with the use of twist-bundle-drawing technique, and are mechanically robust enough to be knitted to a cloth by a commercial cloth knitting machine. Subsequently, the reduced-graphene-oxide-modified conductive yarns covered with a hierarchical structure of MnO2 nanosheets and a polypyrrole thin film were used to fabricate weavable, knittable and wearable yarn supercapacitors. The resultant modified yarns exhibit specific capacitances as high as 36.6 mF cm-1 and 486 mF cm-2 in aqueous electrolyte (three-electrode cell) or 31 mF cm-1 and 411 mF cm-2 in all solid-state two-electrode cell. The symmetric solid-state supercapacitor has high energy densities of 0.0092 mWh cm-2 and 1.1 mWh cm-3 (both normalized to the whole device) with a long cycle life. Large energy storage textiles are fabricated by weaving our flexible all-solid-state supercapacitor yarns to a 15 cm × 10 cm cloth on a loom and knitting in a woollen wrist band to form a pattern, enabling dual functionalities of energy storage capability and wearability.
Original languageEnglish
Pages (from-to)4766-4775
Number of pages10
JournalACS Nano
Volume9
Issue number5
DOIs
Publication statusPublished - 26 May 2015

Keywords

  • energy storage textiles
  • knittability
  • wearability
  • weavability
  • yarn supercapacitors

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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