Battery
A current is produced basically by the flow of electrons. The dry cell, or Leclanche battery works by creating two electrochemically different ends (an anode and a cathode) so current passes through when a complete circuit is connected. This involves non-renewable compounds which initiate reactions at both ends of the cell. These reactions allow the flow of ions which ultimately produce the current.Diagram 1: The make-up of a dry cell Diagram 1 shows the composition of the cell initially. As the cell is used zinc ions are formed and ammonium ions are discharged. The zinc reaction occurs at the anode: Zn „_ Zn2+ + 2e- While at the cathode: NH4+ + MnO2 + H2O + e- „_ Mn(OH)3 + NH3 The reduction of Manganese from 4+ to 3+ produces a voltage of about 1.5V. The dry cell is the cheapest commercially available battery. Depending on the relative size, each battery can be worth less than $3. In our fast paced modern world of electricity and communication the dry cell battery is widely used in items such as torches
, walkmans and other music players, calculators, clocks and toys. It is an essential part of our society as the TV could not be changed without these batteries. However there is not a great amount of voltage produced so it can only run smaller items for variable periods of time. The vanadium redox battery, unlike the dry cell is much more complicated. It gets it name from the reactions that take place between the vanadium metal. Energy is stored by employing vanadium redox couples V2+ and V3+ in the negative, while V4+, V5+ in the positive half-cells. These are stored in mild electrolyte sulfuric acid solutions. The VRB has been referred to as "The Green Battery" due to the materials used in it's construction and for it's ability to integrate with natural power sources such as wind and solar. Alternative battery systems contain heavy metals such as lead, nickel, zinc and cadmium all of which have potentially adverse environmental impacts during production, use and disposal. The electrolytes used in VRB have an indefinite life, there are no disposal issues as the electrolytes ar
Some common words found in the essay are:
COST PRACTICALITY, BATTERY CHEMISTRY, V4+ V5+, Green Battery, IMPACT SOCIETY, ENVIRONMENTAL IMPACT, Cathode V4+, CELL CHEMISTRY, dry cell, vanadium redox, environmental impact, impact society, V2+ V3+, + e-, IMPACT VRB, dry cell battery, voltage 15v, cost practicality, redox battery, diagram 1, redox cell, vanadium redox battery, vanadium redox cell,
Approximate Word count = 733
Approximate Pages = 3 (250 words per page double spaced)
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