High-Energy-Density Foldable Battery Enabled by Zigzag-Like Design

Xiangbiao LIAO, Changmin SHI, Tianyang WANG, Boyu QIE, Youlong CHEN, Pengfei YANG, Qian CHENG, Haowei ZHAI, Meijie CHEN, Xue WANG, Xi CHEN*, Yuan YANG

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

57 Citations (Scopus)

Abstract

Flexible batteries, seamlessly compatible with flexible and wearable electronics, attract a great deal of research attention. Current designs of flexible batteries struggle to meet one of the most extreme yet common deformation scenarios in practice, folding, while retaining high energy density. Inspired by origami folding, a novel strategy to fabricate zigzag-like lithium ion batteries with superior foldability is proposed. The battery structure could approach zero-gap between two adjacent energy storage segments, achieving an energy density that is 96.4% of that in a conventional stacking cell. A foldable battery thus fabricated demonstrates an energy density of 275 Wh L−1 and is resilient to fatigue over 45 000 dynamic cycles with a folding angle of 130°, while retaining stable electrochemical performance. Additionally, the power stability and resilience to nail shorting of the foldable battery are also examined.

Original languageEnglish
Article number1802998
Number of pages7
JournalAdvanced Energy Materials
Volume9
Issue number4
Early online date7 Dec 2018
DOIs
Publication statusPublished - 24 Jan 2019
Externally publishedYes

Bibliographical note

Funding Information:
X.B.L., C.M.S., T.Y.W., and B.Q. contributed equally to this work. Y.Y. acknowledges support from startup funding by Columbia University and AFOSR (FA9550-18-1-0410). M.J.C., X.W., and X.B.L. acknowledge support from the China Scholarship Council (CSC) graduate scholarship. The work of X.B.L. and X.C. was supported by the Yonghong Zhang Family Center for Advanced Materials for Energy and Environment.

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • energy density
  • flexible
  • foldable
  • lithium ion batteries
  • nonflammable

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