Leaders in Activated Carbon | Supercapacitor Activated Carbon (Part 1)

1Basic Introduction

Super capacitor activated carbon is usually called super activated carbon or carbon electrode material. It is characterized by large specific surface area, concentrated pores, low ash, and good conductivity. It is suitable for manufacturing high-performance batteries, Supercapacitor and heavy metal recovery carriers. High purity and ultra-fine activated carbon for supercapacitors has a high specific surface area and developed mesopores. The pore structure distribution is reasonable, and the apparent density is moderate, making it irreplaceable for other types of activated carbon.

The study of the specific surface area of supercapacitor activated carbon is very important. The detection data of the specific surface area of supercapacitor activated carbon can only be true and reliable when detected using the BET method. Currently, many instruments in China can only perform direct comparison testing, which has also been phased out in China. At present, the multi-point BET method is commonly used for specific surface area testing both domestically and internationally. The specific surface area measurement standards developed domestically and internationally are based on the BET testing method. Please refer to the Chinese domestic standard (GB/T19587-2004) - Gas adsorption BET principle for determining the specific surface area of solid substances. Specific surface area testing is actually a time-consuming task. Due to the different adsorption abilities of samples, some samples may require a whole day of testing. If the testing process is not fully automated, the testers cannot leave at all times and need to be highly concentrated. Observing the dashboard and manipulating the knobs can lead to the failure of the testing process, which will waste a lot of valuable time for testers. F-Sorb2400 specific surface area tester is an instrument that can really realize the BET method detection function (also has the direct comparison method). The more important F-Sorb2400 specific surface area tester is the only automatic and intelligent specific surface area detection equipment in China so far. Its test results are highly consistent with the international standards and have good stability. At the same time, it reduces Personal equation and improves the accuracy of test results.

2processing method

A treatment method for activated carbon used in supercapacitors, characterized in that any one of metal ions Al3+, Li+, Zn2+, Cu2+, Tl+, Pb2+is used for under potential deposition on the surface of activated carbon to provide Faraday quasi capacitance for electrochemical double-layer capacitors. Either of the ion solutions can be added to the KoH electrolyte of the supercapacitor, or the activated carbon powder can be modified with any of the ion solutions to deposit the ions in its micropores. The super container made by the present invention is combined with a battery or other batteries to form a composite battery, solving the problem that existing batteries cannot meet the requirements of high power, large capacity, and fast charging. It is widely used in important departments such as aerospace, military, transportation, power, communication, and has important practical significance and broad prospects.

3key technology

In order to ensure the good performance of the electrochemical supercapacitor obtained, the selected electrode material must be easy to form a high double layer capacitance or Faraday capacitance at the electrode/electrolyte interface, have appropriate mechanical stability, and have good electronic and ion conductivity. In the research and development process of electrochemical capacitors, many different electrode materials have been developed and used. Currently, the electrode materials of electrochemical supercapacitors mainly include carbon electrodes, metal oxide electrodes, and conductive polymer electrodes. Due to the fact that electrode materials are the core factor determining the performance of supercapacitors, supercapacitors require electrode materials to meet the following conditions:
(1) Having internally connected holes;
(2) A very large surface area per unit volume or mass;
(3) Good wettability of electrolyte;
(4) High conductivity of solid state networks;
(5) Good chemical stability, no chemical reaction with electrolyte;
(6) Long service life;
(7) Low price and easy availability to achieve higher energy density and power density.

New Highlights of Activated Carbon Market

In the second week of resuming work after entering the year, the domestic activated carbon market is gradually recovering. Currently, coal based carbon enterprises have a relatively high operating rate due to fewer furnace shutdowns during the Chinese New Year; The construction of wooden charcoal enterprises in the south has slowed down slightly, with some recovering and some still undergoing maintenance and technological transformation. It is expected that there will be an increase in construction next week; Coconut shell and fruit shell charcoal enterprises are still in operation.
With the passing of Yuanxiao (Filled round balls made of glutinous rice-flour for Lantern Festival) and the end of the year, the factory gradually made external quotations, and the downstream and middlemen made inquiries. From the perspective of the market after the year, the current price of coal based pillar carbon has shown a slight decline compared to before, mainly due to factors such as lower raw material prices, insufficient demand follow-up, and inventory pressure. The prices of other types of carbon have temporarily remained stable; The quotation for wooden charcoal is not high, and the holding factory stated that the price is stable, while the manufacturer is watching the market; Coconut shell and fruit shell charcoal offer slightly different prices, but the overall trend is mainly stable. Currently, there is not much spot supply of imported raw materials, and the origin is in the rainy season in the Philippines. Traders have stated that the price fluctuation will not be significant after the year, but buyers do not have a high ability to accept high prices.
It is expected that the overall operating rate of enterprises will increase next week, and the enthusiasm of all parties in the market to enter the market will be higher. Quotations and inquiries will increase.