In:
Journal of The Electrochemical Society, The Electrochemical Society, Vol. 168, No. 3 ( 2021-03-01), p. 030523-
Abstract:
Herein, we report a binder-free, low-cost and high performance cathode for lithium-oxygen batteries based on carbon black BP2000 decorated Ni(OH) 2 nanoflakes array on Ni foam. The Ni(OH) 2 nanoflakes array is fabricated by hydrothermal treatment of Ni foam in acidic medium without nickel salt. The highly organized structure of Ni(OH) 2 nanoflakes array provides a more uniform distribution of catalysts and discharge products, resulting in high capacity with a relatively stable cycling voltage profile. The cathode outputs a discharge capacity as high as 12400 mAh g carbon −1 at 160 mA g carbon −1 , which is 244% higher than that of BP2000 decorated Ni foam electrode without Ni(OH) 2 nanoflakes array. The cathode can sustain 100 cycles under a capacity limitation of 320 mAh g carbon −1 with high energy efficiency (∼67%). Our work points out the key issues and suggests an effective method for the surface modification technology.
Type of Medium:
Online Resource
ISSN:
0013-4651
,
1945-7111
DOI:
10.1149/1945-7111/abec95
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2021