▎ 摘　　要

NOVELTY - Preparing nickel selenide super capacitor based on space charge mechanism energy storage comprises coating a hollow nano-sphere structure coated with graphene as a capacitor electrode material and active carbon as a counter electrode, where the lithium-ion super capacitor electrolyte is 1.0 M lithium-lithium-phosphorus (LiPF6) in an EC: DMC: EMC: 1:1:1 1 VoL% lithium-sodium compound lithium, metal lithium, sodium compound lithium and sodium electric anode material as the counter electrode of the battery, assembling into lithium and a sodium ion battery, placing lithium and the sodium battery in a glove box for a certain period of time, discharging 0V after multiple times of charge and discharge cycle, and finishing electrode material stable and ion embedding process, removing the nickel-selenide electrode material from the glove box, placing lithium-ion super capacitor under constant magnetic field, and monitoring electrochemical properties and magnetic change. USE - Preparation method of nickel selenide super capacitor based on space charge mechanism energy storage. ADVANTAGE - The method adopts special design, can realize energy storage of high energy density and high power density, can be effectively applied to the fields of large-rate charging and discharging and large capacity storage, can well avoid the large volume deformation caused by the redox of nickel-selenide itself to cause poor cycle stability, uses space charge mechanism, namely ion conductor/electron conductor interface of charge separation, realizes high energy density, large power density, long cycle performance, good multiplying power performance of the energy storage device, and the nickel selenide has great application value on energy storage. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the nickel selenide XRD pattern of the preparation method of nickel selenide super capacitor based on space charge mechanism energy storage.