TY - JOUR
T1 - Capacitive Behavior Based on the Ultrafast Mass Transport in a Self-Supported Lithium Oxygen Battery Cathode
AU - Zhao, Guangyu
AU - Liu, Yufei
AU - Tang, Lei
AU - Zhang, Li
AU - Sun, Kening
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/3/25
Y1 - 2019/3/25
N2 - The pore structures of lithium oxygen battery cathodes play a significant role in their reversibility and lifespan by deciding the mass transport in cathodes. In the present work, a porous Co3O4/C modified wood-derived slice is used as self-supported lithium oxygen battery cathode. The straight tubes in vertical and horizontal directions inherited from wood vessels afford the cathodes facilitated paths for gas and ion transport, respectively. Furthermore, the homogeneous distribution of mesoporous Co3O4/C polyhedrons on tube wall of wood-derived substrates creates a uniform reaction interface in the cathodes. The ultrafast mass transport and uniform reaction interface lead to a capacitive contribution in battery capacity, owing to the fast kinetics that is free from the semi-infinite diffusion control. Accordingly, these merits enable the cathodes to have good reversibility and cyclability. The batteries can cycle more than 380 rounds without obvious overpotential variation at a current density of 1.0 mA cm-2 within a capacity limitation of 1.0 mAh cm-2.
AB - The pore structures of lithium oxygen battery cathodes play a significant role in their reversibility and lifespan by deciding the mass transport in cathodes. In the present work, a porous Co3O4/C modified wood-derived slice is used as self-supported lithium oxygen battery cathode. The straight tubes in vertical and horizontal directions inherited from wood vessels afford the cathodes facilitated paths for gas and ion transport, respectively. Furthermore, the homogeneous distribution of mesoporous Co3O4/C polyhedrons on tube wall of wood-derived substrates creates a uniform reaction interface in the cathodes. The ultrafast mass transport and uniform reaction interface lead to a capacitive contribution in battery capacity, owing to the fast kinetics that is free from the semi-infinite diffusion control. Accordingly, these merits enable the cathodes to have good reversibility and cyclability. The batteries can cycle more than 380 rounds without obvious overpotential variation at a current density of 1.0 mA cm-2 within a capacity limitation of 1.0 mAh cm-2.
KW - capacitive behavior
KW - cathode
KW - lithium oxygen battery
KW - metal-organic framework derivate
KW - wood derived substrate
UR - http://www.scopus.com/inward/record.url?scp=85064846703&partnerID=8YFLogxK
U2 - 10.1021/acsaem.8b02154
DO - 10.1021/acsaem.8b02154
M3 - Article
AN - SCOPUS:85064846703
SN - 2574-0962
VL - 2
SP - 2113
EP - 2121
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 3
ER -