Flexible, Stretchable, Water-/Fire-Proof Fiber-Shaped Li-CO2 Batteries with High Energy Density

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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  • Lin Chen
  • Junxiang Zhang
  • Guicai Qi
  • Jianli Cheng
  • Bin Wang

Related Research Unit(s)


Original languageEnglish
Article number2202933
Journal / PublicationAdvanced Energy Materials
Issue number1
Online published20 Nov 2022
Publication statusPublished - 6 Jan 2023


Flexible fiber-shaped Li-CO2 batteries are regarded to be a potential candidate to power accessories for wearable electronics due to their high theoretical energy density and carbon-neutral capability. However, the difficulties of electrode preparation and architecture design make it challenging for current Li-CO2 batteries to keep a suitable balance between electrochemical performance and multifunctionality, one-dimensional configuration and so forth. Herein, a flexible, stretchable, water-/fire-proof fiber-shaped Li-CO2 battery is constructed through an integrated electrode design strategy and a mechanical engineering-inspired “spring”-like device architecture. Impressively, the as-prepared highly-active Mo2N anchored N-doped carbon nanotubes/carbon fiber hybrid bundle (CFB@NCNT-Mo2N) cathode delivers a large full capacity of 5586.0 µAh cm−1, corresponding to a high energy density of 14 250 Wh kg-1cathode. Meanwhile, it also demonstrates a low charge potential of ≈3.7 V, excellent rate capabilities, and outstanding long-term cycling stability of 525 cycles. Furthermore, the constructed “spring”-like fiber-shaped Li-CO2 battery device using CFB@NCNT-Mo2N and a newly-proposed gracile fibrous Li metal anode exhibits excellent adaptability to deformations including bending and stretching, as well as other favorable features like water-/fire-resistance. The successful demonstration of the proposed high-performance and multifunctional Li-CO2 batteries provide an effective model for designing future flexible energy storage devices beyond metal-gas batteries for wearables in specific application scenarios.

Research Area(s)

  • fiber-shaped, flexible, high energy density, Li-CO2 batteries, stretchable