新宙邦CBS添加剂登上《Small》：高压电解液难题的新解法

Core Viewpoint - The battery industry is undergoing a new round of material upgrades driven by the demands of electric vehicles for lightweight and ultra-fast charging, as well as consumer electronics for thinness and long battery life. High-performance materials such as high-nickel cathodes and silicon-carbon anodes are accelerating their application [2]. Group 1: High-Performance Materials - High-voltage cathodes (4.5 V–4.7 V) are becoming a key focus in the industry due to their ability to enhance energy density and fast charging capabilities. However, issues such as electrolyte oxidation and transition metal ion dissolution pose challenges to battery lifespan and safety [2][4]. - The research team has developed a hybrid molecule CBS (Carbonate Bis(Sulfate)) that combines the structural advantages of carbonates and sulfates, addressing the critical need for a stable electrode-electrolyte interface [4][5]. Group 2: Performance Improvements - The CBS additive significantly enhances battery lifespan, with a capacity retention rate of 94% after 600 cycles at 25°C, and 90% after 1000 cycles at 45°C, showing a much lower impedance growth compared to the baseline [6]. - At 60°C, batteries with CBS maintained a capacity retention rate of 90% after 30 days, with only 3% volume expansion, while the baseline electrolyte showed only 13% capacity retention and 34% volume expansion [7]. - Safety is greatly improved, with the decomposition temperature of the SEI formed by CBS rising from 124.8°C to 140°C, and the CEI decomposition temperature increasing from 93.1°C to 121.4°C, effectively delaying thermal runaway risks [8]. Group 3: Versatility Across Battery Systems - CBS shows advantages beyond the NCM system, performing well in other mainstream battery chemistries. For instance, in the LiCoO₂ system, the capacity retention rate exceeds 80% after 800 cycles at 25°C, compared to only 37% for the baseline [11]. - In the LiMn₀.₆Fe₀.₄PO₄ system, CBS effectively inhibits Mn²+ dissolution at high temperatures, demonstrating superior cycling stability compared to baseline and PS electrolytes [12]. Group 4: Research and Collaboration - The research on CBS was led by a team from Shenzhen New Zobang Technology Co., Ltd. and Southern University of Science and Technology, highlighting a strong collaborative effort in advancing battery chemistry and materials [16]. - Since the release of the CBS technology, multiple leading industry players have shown interest, and the technology is being widely applied in the ICT industry. The company is also focusing on intellectual property protection and value conversion [17].