Given these advantages of widely designable structures and environmentally friendly characteristics, organic electrode materials (OEMs) are considered to be promising electrode materials for alkaline metal-ion batteries. However, their large-scale application is hampered by insufficient specific capacity and rate performance. Here, Fe 2 + is coupled to the anhydride molecule NTCDA to form a novel K-storage anode Fe-NTCDA. In this way, the working potential of Fe-NTCDA anode is reduced, which makes it more suitable to be used as an anode material. Meanwhile, the electrochemical performance is significantly improved due to the increase in K-storage sites. Moreover, electrolytes regulation is implemented to optimize the K-storage behavior, resulting into a high specific capacity of 167 mAh/g after 100 cycles at 50 mA/g and 114 mAh/g even at 500 mA/g in the 3 M KFSI/ DME electrolytes.
Nanocarbon materials demonstrated huge advantages for
K-storage
applications due to their wide range of structural tunabilities. However,
their K-storage performance was still limited by the underutilization
of disordered and ordered carbon structures simultaneously. Here,
we developed a C1N1-based reconstruction strategy
to fabricate N-doped defective carbon nanosheet (NdC) materials for
K-storage. The disordered carbon defects and ordered carbon interlayers
were well balanced via choosing suitable precursors for self-condensation
generation of the C1N1 skeleton as well as subsequently
regulating the high-temperature reconstruction process, resulting
in a significantly enhanced intercalation-adsorption K-storage mechanism.
As a result, the optimized G-NdC materials delivered a high reversible
discharging capacity of 620 mA h/g at 50 mA/g and 241 mA h/g even
at 1000 mA/g as well as 210 mA h/g after 300 cycles at 500 mA/g. These
excellent K-storage properties should be ascribed to the unique order–disorder
balanced microstructures with fast surface capacitive-controlled reaction
kinetics. This study emphasized the important roles of carbon defects
in the K-storage process and provides a deep insight into the understanding
of nanocarbon-based K-storage mechanisms.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.