AUTHOR=Guo Mingxuan , Li Haibo 

TITLE=The Hydrolyzed Mil-88B(Fe) With Improved Surface Area for High-Capacity Lithium Ion Battery

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.781008

DOI=10.3389/fenrg.2021.781008

ISSN=2296-598X

ABSTRACT=In this work, the Mil-88B(Fe) is modified by a facile hydrolysis method for high-performance lithium ions battery (LIB). The hydrolyzed Mil-88B(Fe) (H-Mil-88B(Fe)) heritages the spindle-like shape of Mil-88B(Fe) and forms a porous structure which possesses relatively high specific surface area (427.86 m2 g-1). It is 15 times higher than that of pristine Mil-88B(Fe). As anode for LIB, it reaches to high specific capacity of 600.1 mAh g-1 after 100 cycles at 100 mA g-1, while it is 312.5 mAh g-1 for pure Mil-88B(Fe). Furthermore, the kinetic analysis on i=av^breveals that the b value of H-Mil-88B(Fe) is 0.888, which suggests the mixed contribution from the diffusion and capacity reactions. Further, the capacitance contribution fractions of H-Mil-88B(Fe) is 47.6, 53.28, 56.88, 74.68 and 69.14% at the sweep rate of 0.2, 0.4, 0.6, 0.8, 1.0 mV s-1, respectively, demonstrating a capacitance-dominated charge storage process at fast charging rates.