Recently, the research team led by Li Xianfeng and Zhang Huamin of the Energy Storage Technology Research Department of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences has made new progress in the research of ion-conducting membranes for alkaline zinc-based flow batteries. The research results are published online in "Advanced Functional Materials" (Adv. Funct. Mater.).
Zinc-based flow battery energy storage technology uses abundant zinc as the negative electrode active material. It has the characteristics of low cost, high safety, high open circuit voltage and environmental friendliness. It has good application prospects in the field of distributed energy storage.
At present, the key problem of zinc-based flow batteries is the dendrite, accumulation, and shedding of zinc negative electrodes, resulting in poor battery cycle stability. The film plays an important role in regulating zinc deposition morphology and inhibiting dendrite growth to improve the reliability of battery operation. In the early stage, the research team can adjust the zinc deposition direction and morphology by adjusting the negative charge properties of the porous ion conductive membrane, thereby greatly improving the surface capacity of the zinc-based flow battery and the cycle stability of the battery (Nat. Commun., 2018).
Based on the previous research work, this work selected a commercial polyethylene porous membrane (<20 USD / m2) as the base membrane, and introduced functionalized hollow spheres into the base membrane in situ to prepare a mixed matrix porous membrane, in which the hollow spheres Greatly shorten the ion transmission path, significantly improve the power density of the battery. In addition, the selected hollow ball has excellent stability in alkali. The prepared membrane has excellent mechanical properties and can effectively inhibit the growth of zinc dendrites, thereby greatly improving the cycle stability of zinc-based flow batteries. The alkaline zinc-iron flow battery assembled by the membrane material is used at 80mA. / cm2 charge and discharge conditions, the energy efficiency exceeds 88%. This work provides a good guide for the development of high-power density zinc-based flow batteries.
The above work was supported by the National Natural Science Foundation of China, the CAS Frontier Key Project, the CAS-DOE, and the Dalian Institute of Chemical Industry's Independent Deployment Fund.
A jigsaw is a power tool to cut various materials which can also be used to make bevel cuts. It is equipped with a base plate. The saw blade which is positioned at right angle to the motor shaft executes a straight or orbital stroke motion. Jigsaws are available with knob or top handle, with universal motors.
Jig Saw,Cordless Jig Saw,Wood Jig Saw,Handheld Jig Saw
AWLOP CO.,LTD , https://www.awlop.com