advantages and disadvantages of primary and secondary cells pdf

Advantages and disadvantages of primary and secondary cells pdf

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Primary (Non Rechargeable) Batteries

Rechargeable Batteries

Lead-Acid Batteries

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Primary (Non Rechargeable) Batteries

A primary cell is a battery a galvanic cell that is designed to be used once and discarded, and not recharged with electricity and reused like a secondary cell rechargeable battery. In general, the electrochemical reaction occurring in the cell is not reversible, rendering the cell unrechargeable. As a primary cell is used, chemical reactions in the battery use up the chemicals that generate the power; when they are gone, the battery stops producing electricity. In contrast, in a secondary cell , the reaction can be reversed by running a current into the cell with a battery charger to recharge it, regenerating the chemical reactants. Primary cells are made in a range of standard sizes to power small household appliances such as flashlights and portable radios. About 15 billion primary batteries are thrown away worldwide every year, virtually all ending up in landfills.

Rechargeable batteries also known as secondary cells are batteries that potentially consist of reversible cell reactions that allow them to recharge, or regain their cell potential, through the work done by passing currents of electricity. As opposed to primary cells not reversible , rechargeable batteries can charge and discharge numerous times. Secondary cells encompass the same mechanism as the primary cells with the only difference being that the Redox reaction of the secondary cell could be reversed with sufficient amount of energy placed into the equation. The figure below illustrates the mechanism of a charging secondary cell. The Charger shown on the top of the diagram is pulling the negative charges toward the right side of the separator.

Rechargeable Batteries

They offer some distinct advantages and improvements over other forms of battery technology. To gain the best from the li-ion battery technology, it is necessary to understand not only the advantages, but also the limitations or disadvantages of the technology. In this way they can be used in a manner that plays to their strengths in the best way. With lithium ion battery technology advancing at a very swift rate, the disadvantages are being addressed and the overall technology is being improved. There are many advantages to using a li-ion cell of battery.

Lead-Acid Batteries

Classification of Cells or Batteries. Electrochemical batteries are classified into 4 broad categories. A primary cell or battery is one that cannot easily be recharged after one use, and are discarded following discharge. Most primary cells utilize electrolytes that are contained within absorbent material or a separator i. A secondary cell or battery is one that can be electrically recharged after use to their original pre-discharge condition, by passing current through the circuit in the opposite direction to the current during discharge.

Lithium Ion Battery Advantages & Disadvantages

A potential difference is created that can drive an electric current to do work. Electrochemical cells have very important commercial applications as a portable supply of electricity to power electronic devices such as mobile phones, tablets and laptops.


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