The document discusses batteries and supercapacitors. It describes how batteries store chemical energy through electrochemical reactions while supercapacitors store electrical energy via physical separation of charges. Some key advantages of supercapacitors over batteries are their ability to charge and discharge quickly, operate over a wide voltage range, and withstand many charge/discharge cycles. The document outlines different types of supercapacitors and their construction, parameters for rating them, and areas of application such as electrical vehicles and backup power systems.
2. BATTERYBATTERYBATTERYBATTERY
Electrode materialsElectrode materials
react electrochemicallyreact electrochemically
with the ions required inwith the ions required in
the reaction to bethe reaction to be
transferred throughtransferred through
electrolyte in which theelectrolyte in which the
electrodes are immersedelectrodes are immersed
Energy storage capacityEnergy storage capacity
is given by Ah or Whis given by Ah or Wh
3. SHORTCOMINGSSHORTCOMINGS
OF BATTERIESOF BATTERIES
SHORTCOMINGSSHORTCOMINGS
OF BATTERIESOF BATTERIES
CostCost
MaintenanceMaintenance
Shelf and working lifeShelf and working life
Weight and sizeWeight and size
Large number ofLarge number of
battery conditioningbattery conditioning
parametersparameters
4. PEAK POWERPEAK POWER
REQUIREMENT WHEREREQUIREMENT WHERE
BATTERY AND CAPACITORBATTERY AND CAPACITOR
HAS PROBLEMSHAS PROBLEMS
PEAK POWERPEAK POWER
REQUIREMENT WHEREREQUIREMENT WHERE
BATTERY AND CAPACITORBATTERY AND CAPACITOR
HAS PROBLEMSHAS PROBLEMS
Starting of any DC MotorStarting of any DC Motor
Generator-Motor setsGenerator-Motor sets
CamerasCameras
Audio Video devicesAudio Video devices
SUPERCAPACITOR CAN BE USED TOSUPERCAPACITOR CAN BE USED TO
FULFILLFULFILL
PEAK POWER REQUIREMENTSPEAK POWER REQUIREMENTS
Starting of any DC MotorStarting of any DC Motor
Generator-Motor setsGenerator-Motor sets
CamerasCameras
Audio Video devicesAudio Video devices
SUPERCAPACITOR CAN BE USED TOSUPERCAPACITOR CAN BE USED TO
FULFILLFULFILL
PEAK POWER REQUIREMENTSPEAK POWER REQUIREMENTS
5. EDLC Stores Energy in the Form of Electrostatic Charges byEDLC Stores Energy in the Form of Electrostatic Charges by
Polarizing an Electrolyte Solution. There Is No ChemicalPolarizing an Electrolyte Solution. There Is No Chemical
Reaction Involved in Its Mechanism Which Is ReversibleReaction Involved in Its Mechanism Which Is Reversible
STORES GREATER AMOUNT OF ENERGYSTORES GREATER AMOUNT OF ENERGYSTORES GREATER AMOUNT OF ENERGYSTORES GREATER AMOUNT OF ENERGY
EXTREMELY EFFICIENTEXTREMELY EFFICIENT
8. COMPARATIVE STUDYCOMPARATIVE STUDY
EDLCEDLC
Operates within its anyOperates within its any
voltage rangevoltage range
Can be stored in charged/Can be stored in charged/
discharged statedischarged state
It can completelyIt can completely
dischargedischarge
Stores less energyStores less energy
It can deliver frequentIt can deliver frequent
power pulsespower pulses
It can charge very fastIt can charge very fast
It can recycle thousandIt can recycle thousand
timestimes
EDLCEDLC
Operates within its anyOperates within its any
voltage rangevoltage range
Can be stored in charged/Can be stored in charged/
discharged statedischarged state
It can completelyIt can completely
dischargedischarge
Stores less energyStores less energy
It can deliver frequentIt can deliver frequent
power pulsespower pulses
It can charge very fastIt can charge very fast
It can recycle thousandIt can recycle thousand
timestimes
BatteryBattery
Operates with narrow range ofOperates with narrow range of
voltagevoltage
Storage is problem in anyStorage is problem in any
statestate
Over discharging can damageOver discharging can damage
itit
Stores more energyStores more energy
Life gets affected due to highLife gets affected due to high
power pulsespower pulses
Fast charging can damage itFast charging can damage it
It can recycle few hundredIt can recycle few hundred
timestimes
BatteryBattery
Operates with narrow range ofOperates with narrow range of
voltagevoltage
Storage is problem in anyStorage is problem in any
statestate
Over discharging can damageOver discharging can damage
itit
Stores more energyStores more energy
Life gets affected due to highLife gets affected due to high
power pulsespower pulses
Fast charging can damage itFast charging can damage it
It can recycle few hundredIt can recycle few hundred
timestimes
10.
Two Electrodes of porous carbon material in the electrolyte withTwo Electrodes of porous carbon material in the electrolyte with
separator.separator.
Porous carbon gives very high surface area of the order of 1500Sq. m perPorous carbon gives very high surface area of the order of 1500Sq. m per
gram.gram.
High surface area gives very high capacitance.High surface area gives very high capacitance.
Two Electrodes of porous carbon material in the electrolyte withTwo Electrodes of porous carbon material in the electrolyte with
separator.separator.
Porous carbon gives very high surface area of the order of 1500Sq. m perPorous carbon gives very high surface area of the order of 1500Sq. m per
gram.gram.
High surface area gives very high capacitance.High surface area gives very high capacitance.
11. EDLC CONSTRUCTIONEDLC CONSTRUCTION
The functional components of a supercapacitorThe functional components of a supercapacitor
Electrodes, Electrolyte and SeparatorElectrodes, Electrolyte and Separator
Surface properties -Surface properties - Significant impact on specificSignificant impact on specific
capacitancecapacitance
Aqueous electrolytes-Aqueous electrolytes- Better conductivity thanBetter conductivity than
organic electrolytesorganic electrolytes
LOW BREAKDOWN VOLTAGELOW BREAKDOWN VOLTAGE
The properties of the separator.The properties of the separator.
12. PARAMETERS FORPARAMETERS FOR
DECIDING RATING OFDECIDING RATING OF
EDLCEDLC
Maximum operating voltage(1 toMaximum operating voltage(1 to
5.0V)5.0V)
Power/ Current (series parallelPower/ Current (series parallel
connections)connections)
Minimum operating voltageMinimum operating voltage
Duration of dischargeDuration of discharge
Repetition rateRepetition rate
(life and thermal issues)(life and thermal issues)
Maximum operating voltage(1 toMaximum operating voltage(1 to
5.0V)5.0V)
Power/ Current (series parallelPower/ Current (series parallel
connections)connections)
Minimum operating voltageMinimum operating voltage
Duration of dischargeDuration of discharge
Repetition rateRepetition rate
(life and thermal issues)(life and thermal issues)
13. EFFECTIVEEFFECTIVE
CAPACITANCECAPACITANCE
Pseudocapacitance- Arises fromPseudocapacitance- Arises from
reversible Faradic reactionreversible Faradic reaction
Charge transfer reaction - voltageCharge transfer reaction - voltage
dependentdependent
High value of specific capacitance -High value of specific capacitance -
Result of Double Layer CapacitanceResult of Double Layer Capacitance
Presence of high surface area materialPresence of high surface area material
due to charge separation taking placedue to charge separation taking place
at atomic levelat atomic level
14. A battery subjected to a pulsed
current without Supercapacitor
A battery subjected to a pulsed
current with a supercapacitor
15. PROBLEMS INPROBLEMS IN
MANUFACTURINGMANUFACTURING
Packaging
Inter-electrode connection
Ventilation
Leakage of electrolyte
Formation of multi-electrode multi cell unit
Keeping minimum contact resistance to meet
power density
Packaging
Inter-electrode connection
Ventilation
Leakage of electrolyte
Formation of multi-electrode multi cell unit
Keeping minimum contact resistance to meet
power density
16. AREAS OFAREAS OF
APPLICATIONS OFAPPLICATIONS OF
EDLCEDLC
Quick charge application- charging in sec andQuick charge application- charging in sec and
discharging in minutes( power tools and toys )discharging in minutes( power tools and toys )
Electrical Vehicles (starting).Electrical Vehicles (starting).
Short term support for uninterrupted powerShort term support for uninterrupted power
system with generator backupsystem with generator backup
Solar array (Energy rich , power poor source )Solar array (Energy rich , power poor source )
Supporting power buses while switchingSupporting power buses while switching
Computer memory backups- low current longComputer memory backups- low current long
duration requirementsduration requirements