南京明善新材料科技有限公司，专注MXene研发多年。

"Hard carbon" applied to sodium-ion batteries is a newly developed material recently developed by the company.

As the most promising anode material for sodium-ion batteries, hard carbon materials can effectively contain sodium ions with their unique disordered layer structure, adjustable nanopores and large layer spacing (about 0.37–0.40 nm), and achieve a reversible specific capacity of 300–350 mAh/g and excellent cycle stability through the synergy of multiple mechanisms such as surface adsorption, pore filling and interlayer embedding. Compared with graphite, hard carbon not only has a lower working potential platform, which helps to improve the energy density of the whole battery, but also ensures the long cycle life of the electrode. The material has a wide range of raw materials (such as coconut shell, wood and resin, etc.), low cost, suitable for large-scale applications, and has been commercialized in the sodium-ion battery products of CATL, Zhongke Haina and other companies, and has shown great potential in cost-sensitive fields such as grid energy storage and low-speed electric vehicles. Although there are still challenges in the first circle of Coulomb efficiency and volumetric energy density, through the continuous optimization of precursor screening, structural regulation and interface modification, hard carbon is continuing to promote sodium-ion batteries from the laboratory to industrialization and become one of the key anode materials.