Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 20, 2020
Previous Article Next Article

Improving areal capacity of flexible Li–CO2 batteries by constructing a freestanding cathode with monodispersed MnO nanoparticles in N-doped mesoporous carbon nanofibers

Author affiliations

Abstract

High-energy-density batteries are in demand to meet society's immense electricity consumption, especially for wearable and portable devices. Li–CO2 batteries have attracted increasing attention for their high theoretical capacity (1876 W h kg−1) and environmental benignity. Recent research efforts have been mainly focused on improving the performance of powder catalysts; however, the overall energy density is still limited due to the inevitable employment of extra gas diffusion layers (GDLs) in cathodes. Against this backdrop, we report a method of fabricating a freestanding cathode containing ultrafine MnO nanoparticles embedded in mesoporous carbon nanofibers (MnO@NMCNFs) using electrospun Mn metal–organic framework nanofibers as precursors. Benefiting from excellent mechanical strength of the nitrogen-doped carbon nanofiber matrix, abundant mesopores and fully exposed Mn(II) active sites, the obtained cathode guarantees high flexibility, high interface accessibility, high catalytic activity and high conductivity. Therefore, the corresponding Li–CO2 batteries achieved ultrahigh areal capacity (19.07 mA h cm−2), impressively low overpotential (0.73 V) and competitive cycling stability (>50 cycles under cut-off capacity of 1 mA h cm−2). A pouch-type flexible cell based on MnO@NMCNFs steadily lit up commercial LED devices at different bending angles. Our findings advance the application of high-energy Li–CO2 batteries in wearable energy storage systems.

Graphical abstract: Improving areal capacity of flexible Li–CO2 batteries by constructing a freestanding cathode with monodispersed MnO nanoparticles in N-doped mesoporous carbon nanofibers

Back to tab navigation

Supplementary files

Article information


Submitted
29 Feb 2020
Accepted
07 Apr 2020
First published
07 Apr 2020

J. Mater. Chem. A, 2020,8, 10354-10362
Article type
Paper

Improving areal capacity of flexible Li–CO2 batteries by constructing a freestanding cathode with monodispersed MnO nanoparticles in N-doped mesoporous carbon nanofibers

S. Li, Y. Liu, X. Gao, J. Wang, J. Zhou, L. Wang and B. Wang, J. Mater. Chem. A, 2020, 8, 10354
DOI: 10.1039/D0TA02387F

Social activity

Search articles by author

Spotlight

Advertisements