Product Search
SHENZHEN OSNPOWER TECH CO.,LTD

Address:Bao An Indutrial Zone,Bao An District ,Shenzhen,China

Tel:+86(0)755-25609940
      +86(0)755-25609941

Fax:+86(0)755-25609943

E-mail:service@osnpower.com

 


Products
Contact usMore>>
Add: Bao An Industrial Zone, Bao An District, Shenzhen, China
Tel:  +86-755-25609940

        +86-755-25609941

Fax: +86-755-25609943

Email:service@osnpower.com
Home  >  Articles  >  LiFePO4 battery

Leclanché Cells

Leclanché Cells

Characteristics

Primary cell with a nominal open circuit voltage of 1.5 Voltsproduced in very high volumes.

Chemistry based on a zinc anode and a cathode/depolariser ofmanganese dioxide which absorbs the liberated hydrogen bubbleswhich would otherwise insulate the electrode from the electrolyte.It uses a carbon rod as the cathode current collector with anelectrolyte of ammonium chloride. Its variants have been in use forover a century. The performance of Leclanché cells improved by 700%between 1920 and 1990.

Also referred to as Zinc- Carbon Cells or Dry Cells (not to beconfused with Solid State Cells) despite having an aqueouselectrolyte since in modern cells the electrolyte of ammoniumchloride and zinc chloride is produced in gel form or held inporous separators to reduce potential leakage if the cell becomespunctured.

Variants include

*                  Zinc carbon (Carbon cathode)

*                  Zinc chloride (Ammonium chloride electrolyte replaced by zincchloride)

*                  Alkaline manganese ( Ammonium chloride electrode replaced bypotassium hydroxide)

See separate page for Alkalinebatteries.

Advantages

Inexpensive materials

Low cost

Available in a wide range of sizes including AAA, AA, C, D and9Volt sizes.

Suitable for a wide range of consumer applications

Interchangeable with alkaline batteries

Shortcomings

Propensity to leak

The basic zinc carbon battery has a lower energy density than thecompeting alkaline batteries

Poor low temperature performance. Do not function well in sub-zerotemperatures.

The use of naturally occurring manganese dioxide from differentsources can lead to wide performance variations due to the presenceof small quantities of impurities such as nickel, copper, arsenic,and cobalt.

Not rechargeable

Applications

General purpose, low cost applications

Toys

Remote controls

Flashlights

Clocks

Consumer applications

Losing market share to alkaline cells and newer technologies

Costs

Lowest cost primary batteries