A) Calculate the amount of electroactive material required for the 15Ah Leclanche cell and Duracell. B)Calculate their energy density if the weight of non-electro material is 35% of the weight of electroactive material. [Atomic weight of Zn = 65.3g; Mn=55g]
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Answers
Answer:
Compared with zinc-carbon batteries of the Leclanché cell or zinc chloride types, alkaline batteries have a higher energy density and longer shelf life, yet provide the same voltage.
The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide instead of the acidic ammonium chloride or zinc chloride electrolyte of the zinc-carbon batteries. Other battery systems also use alkaline electrolytes, but they use different active materials for the electrodes.
Alkaline batteries account for 80% of manufactured batteries in the US and over 10 billion individual units produced worldwide. In Japan alkaline batteries account for 46% of all primary battery sales. In Switzerland alkaline batteries account for 68%, in the UK 60% and in the EU 47% of all battery sales including secondary types.[1][2][3][4][5] Alkaline batteries contain zinc and manganese dioxide (Health codes 1), which can be toxic in higher concentrations. However, compared to other battery types, the toxicity of alkaline batteries is moderate.[
- Electroactive polymers, or EAPs, are polymers that exhibit a change in size or shape when stimulated by an electric field.
- The most common applications of this type of material are in actuators and sensors.