The Alkaline Dry Cell By Serena Lydia Block

The Alkaline Dry Cell By Serena, Lydia Block: B

Introduction Alkaline dry cell(alkaline battery): a type of dry cell dependent upon the reaction between zinc and manganese dioxide (Zn/Mn. O 2). The origination of its name: the electrolyte(KOH) is alkaline its non-fluid electrolyte

The half-reaction are: Anode: Zn(s) + 2 OH−(aq) → Zn. O(s) + H 2 O(l) + 2 e− Cathode: 2 Mn. O 2(s) + H 2 O(l) + 2 e− →Mn 2 O 3(s) + 2 OH−(aq)

In the earth � 80% of manufactured batteries in the US � 46% of all primary battery sales in Japan � 68% of all battery sales in Switzerland � 60% of all battery sales in the UK � 47% of all battery sales in the EU � 20% of all battery sales in China

Product �Common battery �A rechargeable battery �Detector

Common used �toys (robots and cars ) remotes �wall clocks �other light duty household items �radios �photo-flash applications �watches �high-drain applications �camera �Interphone �Razor �Alarm �Calculator �Hearing aids … r o f e c i o h c t s e b e h T ! ! ! t e g d a g r u yo

Advantages of an Alkaline Battery �Chemical Composition ØElectrolyte: a basic KOH paste(alkaline electrolyte) ØAnode : zinc powder provides greater surface area

Advantages of an Alkaline Battery �Capacity ØThe use of an alkaline compound more energy. ØProduce 500 -700 percent more power

Advantages of an Alkaline Battery �Shelf Life ØNo voltage drop ØAbility to store for a long period of time. Ø 10 times longer than common dry cell.

Advantages of an Alkaline Battery �Performance in Different Environments Ø Ability to be used in different temperatures. Ø Common dry cell: 0 to 160 degrees Ø Alkaline Battery: as low as -20 degrees

Disadvantages of an Alkaline Battery �Cost Ø 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 23 g ; carbon-zinc battery 15 g) �Sign (AR; LR)

References � � � � Life Cycle Impacts of Alkaline Batteries with a Focus on End-of-Life - EBPA-EU Monthly battery sales statistics - Mo. ETI - March 2011 ^ INOBAT 2008 statistics. Battery Waste Management - 2006 DEFRA EPBA statistics – 2000 http: //www. powerstream. com/Battery. FAQ. 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-nonalkalinebatteries. html http: //www. odec. ca/projects/2006/glaz 6 j 2/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 �P 232 #55 Thank you for your listening!