| 摘要 |
The present invention relates to dry cells, it discloses a negative electrode body for dry cells, comprising (by weight): 0.0005~0.010% magnesium; 0.001~0.005% indium or 0.0005~0.005% tin; 0~0.004% lead; 0~0.0005% cadmium; the rest being zinc. It also discloses the preparing method of said negative electrode body for dry cells. It further discloses a Zn/MnO 2 dry cell, including said negative electrode body of the present invention, on the inner surface of which places a coated paper, the outer of which are PVC sheath and iron shell. Inside the coated paper there are powdery bobbin and carbon rod, there is bobbin washer over the powdery bobbin, on the bottom side of the Zn/MnO 2 dry cell there are bottom cap and bottom seal, and on the upper side of it there are rubber plug, top cap and upper seal. It is necessary to add lead and cadmium for the preparation of the prior art zinc can used for the negative electrode body of Zn/MnO 2 dry cell, whereas metal indium or tin is added in place of lead and cadmium for the preparation of the zinc can of the present invention. Compared with prior arts, an advantage of the Zn/MnO 2 dry cells of the present invention is that they are free of lead and cadmium, the preparing process without the addition of lead and cadmium does not lead to environmental pollution, and meets the requirements of environmental protection. |
