What are the advantages of sodium batteries? Can it replace lithium batteries?

Sodium-ion batteries are the closest thing to the goal of replacing lithium batteries. It gave birth to companies such as Faradion (UK), Novasis (US), HiNa (my country) and Tiamat (France). The continuity of sodium-ion batteries has attracted the attention of the industry because compared with Li2CO3 and other lithium raw materials, Na2CO3 is cheaper and has less price fluctuations. The research of sodium ion battery is the same as that of lithium battery, and it is also divided into positive and negative electrode materials and electrolyte. Negative electrode: Because many sodium-based intercalation compounds have a structure similar to that of lithium-based materials, an all-sodium-ion battery was quickly assembled from the research of lithium-ion materials. The hard carbon is composed of disordered graphene layers and nanopores. The absorption of sodium ions is carried out in the inclined area first, followed by the low-pressure plateau. This corresponds to inserting Na+ into the disordered layer and filling the nanopores. Compared with the insertion of Li+ into the graphite, sodium electricity can achieve higher s speed. Positive electrode: The crystal chemistry of sodium-based layered oxides is more abundant than that of lithium-ion layered oxides. This structural difference not only explains the changes in sodium stoichiometry and capacity, but also layered oxides are more prone to sodium-driven structural phase changes. , Thereby reducing the life and power density. In addition, the Na-based polyanionic phase has also been studied in depth, such as phosphate (NaFePO4), sulfate Na2Fe2(SO4)3 and fluorophosphate (NaVPO4F). The Na3V2(PO4)2F3(NVPF) compound has a specific crystal structure composed of open channels for rapid ion diffusion. Under the condition of a uniform potential of 3.9V, each unit compound (i.e. 128mAh/g) can reversibly release 2 Na+, thereby supplying a material-level specific energy of about 507Wh/kg, which is equivalent to 580Wh of LiFePO4 (LFP) as a cathode material for lithium batteries. /kg. Advantages 1. The sodium salt raw material reserves are abundant and the price is low. Compared with the lithium battery ternary cathode material, the iron-manganese-nickel-based cathode material is used, and the raw material cost is lower; 2. The power capacity in fast charging, regenerative braking and start-stop functions, and In terms of the frequency adjustment function of the power grid department, the sodium ion battery based on the open 3D structure performs very well; 3. The sodium ion does not form an alloy with aluminum, and the anode can use aluminum foil as the current collector, which can further reduce the cost; 4. Sodium Electricity can be released or maintained at a voltage of 0V without changing its subsequent performance. 5. Due to the softer chemical properties of Na, the possibility of dendrites and explosions at high charging rates is lower than that of lithium batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement.