The Alkaline Dry Cell

By Serena, Lydia

Block: B

IntroductionAlkaline dry cell(alkaline battery): a type of dry cell dependent upon the reaction between zinc and manganese dioxide (Zn/MnO2).

The origination of its name: the electrolyte(KOH) is alkalineits non-fluid electrolyte

The half-reaction are:Anode: Zn(s) + 2OH−

(aq) → ZnO(s) + H2O(l) + 2e− Cathode: 2MnO2(s) + H2O(l) + 2e− →Mn2O3(s) + 2OH−

(aq)

In the earth80% of manufactured batteries in the US 46% of all primary battery sales in Japan68% of all battery sales in Switzerland60% of all battery sales in the UK 47% of all battery sales in the EU20% of all battery sales in China

Product Common battery

A rechargeable battery

Detector

Common usedtoys (robots and cars ) remoteswall clocks other light duty household itemsradiosphoto-flash applicationswatcheshigh-drain applicationscameraInterphoneRazorAlarmCalculatorHearing aids …

The best choice

for your

gadget!!!

Advantages of an Alkaline Battery Chemical

CompositionElectrolyte: a basic

KOH paste(alkaline electrolyte)

Anode : zinc powder provides greater surface area

Advantages of an Alkaline Battery

CapacityThe use of an alkaline

compound more energy.

Produce 500-700 percent more power

Advantages of an Alkaline Battery Shelf LifeNo voltage drop Ability to store for a

long period of time.10 times longer than

common dry cell.

Advantages of an Alkaline Battery Performance in

Different Environments

Ability to be used in different temperatures.

Common dry cell: 0 to 160 degrees

Alkaline Battery: as low as -20 degrees

Disadvantages of an Alkaline Battery

Cost More expensive than

common dry cell

How to recognize the carbon-zinc battery and alkaline battery in your daily life?

Appearance (more beautiful and better design)

Touch (notch on the bottom)Weight (alkaline battery 23g ; carbon-

zinc battery 15g)Sign (AR; LR)

References Life Cycle Impacts of Alkaline Batteries with a Focus on End-of-Life -

EBPA-EU Monthly battery sales statistics - MoETI - March 2011 ^ INOBAT 2008 statistics. Battery Waste Management - 2006 DEFRA EPBA statistics – 2000 http://www.powerstream.com/BatteryFAQ.html http://www.ehow.com/info_12070433_alkaline-dry-cell-vs-ordinary-dry-cell.

html http://www.ehow.com/facts_7719453_alkaline-vs-regular-battery.html http://www.ehow.com/info_8297163_difference-between-alkaline-nonalkali

ne-batteries.html http://www.odec.ca/projects/2006/glaz6j2/battery_info.htm#diagram http://www.wisegeek.com/what-is-a-dry-cell-battery.htm http://dict.battery.com.cn/detail_177.html http://en.wikipedia.org/wiki/Alkaline_battery?vm=r

Homework P232 #55

Thank you for your listening!