Battery VS Supercapacitor

Battery VS Supercapacitor
Battery VS Supercapacitor

Batteries as supercapacitors are electrical storage devices. Battery is more widely used due to its ability to store more energy for a given weight and volume: it has a better energy density. Supercapacitor on the other hand can be charged and discharged very quickly (or slowly if you do not need power): it has a very high power density.

But the differences between these two systems do not stop there. The evolution of these features with the technological improvements and declining prices mean that supercapacitors are increasingly used and will be even more in the future.

There are important differences between the technologies of batteries and supercapacitors. There is one side the lead-acid batteries, Ni-MH, LMP, Li-Po, Li-ion, etc. On the other side, there are supercapacitors with organic electrolyte, with aqueous electrolyte, with ionic liquid, hybrid supercapacitors, pseudo-supercapacitors...

To simplify things, here is a table comparing the today key battery: Lithium-ion battery that offers a very good energy density, and supercapacitors commonly used today.

Feature Li-ion Battery Supercapacitor
Gravimetric energy (Wh/kg) 100 - 265 4 - 10
Volumetric energy (Wh/L) 220 - 400 4 - 14
Power density (W/kg) 1,500 3,000 - 40,000
Voltage of a cell (V) 3.6 2.7 - 3
ESR (mΩ) 500 40 - 300
Efficiency (%) 75 - 90 98
Cyclability (nb recharges) 500 - 1,000 500,000 - 20,000,000
Life 5 - 10 years 10 - 15 years
Self-discharge (% per month) 2 40 - 50 (descending)
Charge temperature 0 to 45°C -40 to 65°C
Discharge temperature -20 to 60°C -40 to 65°C
Deep discharge pb yes no
Overload pb yes no
Risk of thermal runaway yes no
Risk of explosion yes no (1)
Charging 1 cell complex easy
Charging cells in series complex complex
Voltage on discharge stable decreasing (2)
Cost per kWh 200 - 1,000 € 10,000 €

(1) With a compliant charging system and exposure temperature in the operating range (often from -40 to 65°C), there is no risk that a supercapacitor explode or catch fire, unlike a Lithium-ion battery.

(2) At a constant voltage charging, the voltage of a supercapacitor increases progressively, but the charge is more effective at constant current and voltage then rises straight. During discharge, the voltage of a supercapacitor decreases continuously. To exploit at best the energy of a supercapacitor, we use a voltage converter to obtain a stable voltage.

Supercapacitor boat
Supercapacitor electric boat
Supercapacitor electric bus
World's fastest charging electric bus : 10 seconds
Supercapacitor electric bus adopted in China
Supercapacitor electric bus adopted in China

Battery and supercapacitor: rival or complementary?

We should not necessarily oppose battery and supercapacitor. For many applications, these storage systems enable a more efficient solution when they are used together.

Indeed, battery can be used to store a large amount of electricity while supercapacitor, positioned in buffer energy system is used for power peaks demands. This avoids too severe demands on battery witch alter its life, while gaining power.

Thus, the cars of Autolib' - a successfull electric car sharing service in Paris (FRANCE) - use supercapacitors associated with Lithium Metal Polymer batteries that have a low power density, but a longer service life than Li-ion batteries. A very appropriate choice for high demand vehicles.


#1  - said :

I’ve seen all the entries and all of them are very good. I think that more entries should be in this blog because more people visit it and more people have different opinions so different entries.

#2  - writing essays said :

I generally get a kick out of the chance to read articles to enhance my insight. I discovered your blog online as a good wellspring of data. Your posts are truly helped me to get some exceptionally essential information. Continuously keep this quality and structure. Thanks to your articles.

#3  - manolomendez said :

I admit, I have not been on this web page in a long time... however it was another joy to see It is such an important topic and ignored by so many, even professionals. I thank you to help making people more aware of possible issues.

#4  - Jen said :

I love the Batman vs. Superman reference. Genius and hilarious!

#5  - car hire peyia cyprus said :

Wow what a great topic.

#6  - N10-007 exam question said :

The evolution of these features with the technological improvements and declining prices mean that supercapacitors are increasingly used and will be even more in the future.

#7  - loemrntdherid1 said :

This is good site to spent time on .

#8  - roblox hack said :

This feature is very useful for the online free roblox free robux hack to generate and to get robux for free with out the use of free robux generator.

#9  - Mechanical Engineering College said :

Anangpurias is the must go Institutes for those who sincerely want to pursue their professional education and want to contribute to their respective professional fields. Over a period of 17 years, we have grown and evolved as the Institutes of eminence, passing many milestones and shaping traditions along the way.

Website :

#10  - Do my computer science homewor said :

I Personally Like Your Post, You Have Shared Good Article. It Will Help Me In Great Deal.

#11  - said :

I Personally Like Your Post, You Have Shared Good Article. It Will Help Me In Great Deal.

#12  - John Keats said :

____Black Friday Deals and Coupons ___

****** DJI Phantom 3 Standard Drone Black Friday *******

****** Toshiba Laptops Best Buy ******

#13  - visiting card said :

Hii, Great article. Keep it up.

#14  - pamphlet printing said :

Great Post !

#15  - Packers And Movers Mumbai said :

Hire Best Packers And Movers Mumbai for hassle-free Household Shifting, ***Office Relocation, Car Transporation, Loading Unloading, packing Unpacking at affordable Price Quotation. Top Rated, Safe and Secure Service Providers who can help you with 24x7 and make sure a Untroubled Relocation Services at Cheapest/Lowest Rate @

#16  - Sayali said :

Useful feature! Simply put your blog post to my favourite blog list and will look forward to additional updates.

#17  - Packers And Movers Bangalore said :

Packers And Movers Bangalore Local Household Shifting Service, Get Free Best Price Quotes Local Packers and Movers in Bangalore List, Compare Charges, Save Money And Time at @

#18  - Packers and Movers Hyderabad said :

Packers and Movers Hyderabad Give Certified and Verified Service Providers, Cheap and Best ###Office Relocation Charges, ***Home Shifting, ✔✔✔Goods Insurance worth Rs. 10,000, Assurance for Local and Domestic House Shifting. Safe and Reliable Household Shifting Services in Hyderabad with Reasonable Packers and Movers Price Quotation @

#19  - Packers And Movers Gurgaon said :

Packers and Movers Gurgaon Provide Reliable, Safe and Certified Service Provider list, Get Free ***Best Price Quotaition and Compare Charges. ???Hassle free Household Shifting Services, High Quality packing Material, Office Relocation, Car Transportaion, ###Local and Domestic Shifting Service @

#20  - Packers And Movers Delhi said :

Get Shifting/Relocation Quotation from ###Packers and Movers Delhi. Packers and Movers Delhi 100% Affordable and Reliable ***Household Shifting Services. Compare Transportation Charges and Save Time, Verified and Trusted Packers and Movers in Delhi, Cheap and Safe Local, Domestic House Shifting @


Rss feed of the article's comments

Write a comment

What is the third letter of the word maisn?