凯金新能源申请硬碳负极材料制备方法专利，提升钠离子电池的首次库伦效率

Group 1 - Guangdong Kaijin New Energy Technology Co., Ltd. has applied for a patent titled "Preparation Method of Hard Carbon Anode Material and Its Hard Carbon Anode Material, Sodium Ion Battery," with publication number CN121449046A and application date of December 2025 [1] - The patent describes a preparation method for hard carbon anode material using coal chemical waste as a carbon precursor, which undergoes crushing and reaction with sulfuric acid at a concentration of 30-80 wt.% to obtain an intermediate [1] - The resulting hard carbon anode material exhibits high initial coulombic efficiency, reversible specific capacity, and cycling stability due to the specific catalyst and cooling rate used in the carbonization process [1] Group 2 - Guangdong Kaijin New Energy Technology Co., Ltd. was established in 2012 and is located in Dongguan City, primarily engaged in the non-metallic mineral products industry [2] - The company has a registered capital of 369.069246 million RMB and has made investments in 14 enterprises, participated in 57 bidding projects, and holds 400 patent information records [2] - Additionally, the company possesses 93 administrative licenses and has 4 trademark information records [2]