What are the advantages and disadvantages of power batteries and energy storage batteries? -(2)

Continue with the previous about the advantages and disadvantages of battery energy storage (analysis of the rest six energy storage Lead Acid Batteries) as follow:

Fourth, super capacitor
The main advantage:
1. High power density;
2. The charging time is short.
Main disadvantages:
The energy density is low, only 1-10Wh/kg, and the supercapacitor cruising range is too short to be used as the mainstream power source for electric vehicles.
Advantages and disadvantages of battery energy storage (analysis of nine energy storage Maintenance Free Battery)

Five, fuel cell
The main advantage:
1. It has higher specific energy and longer mileage.
2. High power density, high current charge and discharge;
3. Environmental protection, no pollution.
Main disadvantages:
1. The system is complex and the technology maturity is poor;
2. The construction of hydrogen supply system lags behind;
3. There are high requirements for sulfur dioxide in the air. Due to serious domestic air pollution, fuel cell vehicles in China have a short life span.

Six, sodium sulfur battery
Advantage:
1. High specific energy (theory 760 wh/kg; actual 390 wh/kg);
2, high power (discharge current density up to 200 ~ 300mA / cm2);
3, charging speed is fast (filled with 30min);
4, long life (15 years; or 2500 ~ 4500 times);
5, no pollution, recyclable (Na, S recovery rate of nearly 100%); 6, no self-discharge phenomenon, high energy conversion rate;
insufficient:
1. The working temperature is high, and its working temperature is between 300 and 350 degrees. When the battery is working, it needs a certain heating and heat preservation, and the startup is slow;
2, the price is expensive, 10,000 yuan per kWh;
3. Poor security.

Seven, flow battery (vanadium battery)
advantage:
1. Safe and deep discharge;
2, large scale, storage tank size is not limited;
3. There is a large charge and discharge rate;
4, long life, high reliability;
5, no emissions, low noise;
6, charging and discharging switching fast, only 0.02 seconds;
7. The location is not subject to geographical restrictions.
Disadvantages:
1. Cross-contamination of positive and negative electrolytes;
2. Some use expensive ion exchange membranes;
3. The two solutions are bulky and have lower specific energy;
4. Energy conversion efficiency is not high.

Eight, lithium air battery
Fatal defect:
The solid reaction product lithium oxide (Li2O) is deposited on the positive electrode, and the contact between the electrolyte and the air is blocked, thereby causing the discharge to stop. Scientists believe that the performance of lithium-air batteries is 10 times that of lithium-ion batteries, providing the same energy as gasoline. Lithium-air batteries charge oxygen from the air, so the battery can be smaller and lighter. Many laboratories around the world are studying this technology, but if there is no major breakthrough, it may take another 10 years to achieve commercial use.

Nine, lithium-sulfur battery (lithium-sulfur battery is a kind of high-capacity Energy Storage System with great development prospects)
advantage:
1. High energy density, theoretical energy density up to 2600Wh/kg;
2. Low raw material costs;
3. Low energy consumption;
4, low toxicity.
Although lithium-sulfur battery research has been going on for decades, and in the past 10 years, many achievements have been made, but there is still a long way to go.