LC1-F AC Contactor(Our own model is BC1-F series AC Contactor) ,it is used in rated voltage 380V AC 50Hz/60Hz,allocated special with coil,which can be used in ciruit of 40-400Hz,the control coil voltage(AC coil operation) can up to 660V,rated current up to 800A electric circuits.
LC1-F AC Contactor is mainy used for remoting making&breaking circuits,also for frequency staring or controlling motor,protect circuit from over-load when assembling with thermal over-load relay.It can unify the general electrical equipment,motor and circuit,the auxiliary contact group,Air time-delay head,Mechanical interlock contactor and star-triangle starter.
Electrical Magnetic Contactor,Electrical Ac Contactor DC Contactor,Industrial Controls AC Magnetic Contactor,AC Magnetic Contactor Ningbo Bond Industrial Electric Co., Ltd. , https://www.bondelectro.com
Lithium-sulfur battery belongs to lithium-ion battery? What is the difference between lithium-ion battery and lithium-sulfur battery?
Lithium-sulfur batteries are a type of advanced energy storage technology that has not yet reached full commercialization. These batteries use sulfur as the positive electrode and metallic lithium as the negative electrode, offering significant advantages over conventional lithium-ion batteries. One of their key benefits is an exceptionally high specific capacity, reaching up to 1675 mAh/g—far surpassing the typical 150 mAh/g of lithium cobalt oxide batteries. Additionally, sulfur is a low-cost, environmentally friendly material, making lithium-sulfur batteries a promising candidate for future energy storage solutions.
Despite these advantages, lithium-sulfur batteries face several challenges that have hindered their widespread adoption. The complex electrochemical reactions during charge and discharge, particularly involving polysulfides, lead to issues such as poor cycle life and capacity fading. As of 2013, researchers were still working to fully understand the intermediate products formed during these reactions, which complicates the development of stable and efficient battery designs.
During discharge, the lithium anode reacts by losing electrons, forming lithium ions, while the sulfur cathode accepts these ions and combines with them to form various sulfide compounds. This process occurs in two distinct voltage plateaus, corresponding to different stages of sulfur reduction. The first plateau appears around 2.4–2.1 V, associated with the formation of polysulfides (Li₂Sₙ), and the second occurs near 2.1–1.8 V, where these polysulfides further reduce to solid Li₂S. On the other hand, during charging, the reverse reaction takes place, though complete oxidation back to elemental sulfur is difficult, resulting in a charging plateau near 2.5–2.4 V.
The theoretical voltage of a lithium-sulfur battery is approximately 2.287 V when lithium reacts completely with sulfur to form lithium sulfide (Liâ‚‚S). This leads to a high theoretical specific energy of about 2600 Wh/kg, making it highly attractive for applications requiring lightweight and high-energy-density power sources. However, practical implementation remains limited due to technical challenges, including the dissolution of polysulfides into the electrolyte and the instability of the lithium metal anode.
Research continues to address these issues through innovations in electrode materials, electrolyte formulations, and cell design. Scientists like Yuan Lixia have contributed to understanding the electrochemical mechanisms involved, highlighting the importance of controlling the formation and behavior of polysulfides. As progress is made, lithium-sulfur batteries may one day become a viable alternative to traditional lithium-ion batteries, especially in applications such as electric vehicles and grid-scale energy storage.