| With the excessive consumption of non-renewable energy sources such as oil,it is more and more important to develop and utilize renewable energy sources such as solar and wind energy.However,various renewable energy sources are limited by geographical and environmental factors,and there are serious randomness and intermit entity.Therefore,optimized energy management and large-scale storage are critical.Secondary batteries are widely regarded as strong competitors for large-scale energy storage technology,but the scarcity and uneven distribution of lithium in the earth’s crust limit development and have great limitations in the field of large-scale energy storage.In order to solve the above problems,this paper has carried on the in-depth study and discussion on the anion energy storage system and battery super capacitor system,the main contents are as follows:First,we prepared tunnel-type materials(β-FeOOH NRs)as the new cathode in chloride-ion battery systems through simple hydrothermal methods.The unique tunnel structure supported by chloride ions could improve the efficiency of charge transfer,improving the transmission capacity of chlorine ions,and enhance the structural stability of cathode electrodes.In order to determine the charge motor thermostat ion,the physical structure was characterized by SEM and TEM,and it was found that β-FeOOH was a uniform nano-bar structure with a lattice spacing of 0.704 nm;XRD,IR and XPS performed a metallization analysis of their phase composition and chemical element price state,and various analyses such as ex situ XRD,XPS and EDS showed that chloride ions travel irreversibly between the β-FeOOH cathode and the Li anode.As a result,the cathodeβ-FeOOH had a high capacity of 386.5 mAh g-1 at the first discharge(current density of 100 mA g-1)and excellent multiply capability.Then,with the aid of ALD technology,NiAl-LDH nanoplates were grown in place on graphene as an array-like structure.Due to the synergy of combining LDH and graphene,NiAl-LDH@G has excellent electron conductivity,high electrochemical activity and rapid electron transfer.As a result,the NiAl-LDH@G cathode exhibited a high capacity of 223.3 mAh g-1 in the first discharge cycle,excellent multiply capacity and reversible capacity of 107 mAh g-1 in 500 cycles,and an excellent reversible capacity of 72 mAh g-1 after 120 days.The charge/discharge mechanism was confirmed by ex situ XRD,XPS and EDS measurements,and the results showed that chloride and chloride content changes with the combined price of Ni and Al,and chlorides could be inserted and released inversely into and out of NiAl-LDH@G.There were no significant lattice changes.The design and development of high-efficiency multifunction electrode materials played an integral role in an ionized support system.Finally,to meet the needs of wearable electronic devices,flexible supercapacitors should be explored with high energy densities.In this work,carbon nanotubes(CNTs)grown on carbon cloth(CC)were used as flexible substrates,and CNT nanoarrays(NiCoP/CNT)and N doped carbon-coated CNT nanoarrays(CNT@N-C)synthesized on CC and carbon nanotubes.Positive and negative materials prepared for the manufacture of flexible all-solid hybrid supercapacitors.They all exhibited excellent electrochemical properties,with NiCoP/CNT/CC composites providing a ratio capacitance of 261.4 mAh g-1,while CNT@N-C/CC had a high capacitance of 256 F g-1 at a current density of 0.5 A g-1.A hybrid supercapacitor consisting of two well-designed electrodes provided a ratio capacitor of 123.3 mAh g-1 at a current density of 1 mA g-1 in a potential window of 0-1.5 V and retained almost 85%of its initial capacitance after 5000 cycles.In addition,these flexible devices had a maximum energy density of 138.7 Wh kg-1 and a power density of 6.25 kW kg-1,significantly better than some recently reported super capacitors,demonstrating their potential in practical applications. |
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