Aqueous manganese dioxide ink for paper-based capacitive energy storage devices

Jiasheng Qian, Huanyu Jin, Bolei Chen, Mei Lin, Wei Lu, Wing Man Tang, Wei Xiong, Lai Wa Helen Chan, Shu Ping Lau, Jikang Yuan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

57 Citations (Scopus)

Abstract

KGaA, Weinheim. Abstract We report a simple approach based on a chemical reduction method to synthesize aqueous inorganic ink comprised of hexagonal MnO2nanosheets. The MnO2ink exhibits long-term stability and continuous thin films can be formed on various substrates without using any binder. To obtain a flexible electrode for capacitive energy storage, the MnO2ink was printed onto commercially available A4 paper pretreated with multiwalled carbon nanotubes. The electrode exhibited a maximum specific capacitance of 1035 Fg-1(91.7 mFcm-2). Paper-based symmetric and asymmetric capacitors were assembled, which gave a maximum specific energy density of 25.3 Whkg-1and a power density of 81 kWkg-1. The device could maintain a 98.9% capacitance retention over 10000 cycles at 4 Ag-1. The MnO2ink could be a versatile candidate for large-scale production of flexible and printable electronic devices for energy storage and conversion. Printing the future: A simple chemical reduction method has been used to synthesize aqueous MnO2ink that exhibits long-term stability and can form continuous thin films on various substrates without the need for any binder. The as-prepared MnO2ink can also be coated onto conductive A4 paper to form capacitive energy storage devices.
Original languageEnglish
Pages (from-to)6800-6803
Number of pages4
JournalAngewandte Chemie - International Edition
Volume54
Issue number23
DOIs
Publication statusPublished - 1 Jun 2015

Keywords

  • electrochemistry
  • energy-storage devices
  • metal oxides
  • MnO ink 2
  • thin films

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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