Automated Electrospinning Equipment| Interfacial Chemistry and Lithiophilicity Design for HighEnergy Hybrid Li-lon/Metal Batteries in a Wide TemperatureRange

Prof. Zhifeng Zheng's Team at Xiamen University: High-Energy Hybrid Lithium-Ion/Metal Batteries Operating in a Wide Temperature Range from 50°C to -20°C

Challenge: Lithium-ion/metal hybrid batteries can optimize energy density and lifespan. However, hybrid batteries face critical issues such as poor Li reversibility and dendrite growth.

Method: A collaborative team led by Prof. Zhifeng Zheng (Xiamen University) and Lizhe Liang (Guangxi University) developed a strategy combining carbon fiber lithiophilicity and interface synergy. They designed silver nanoparticle-decorated graphitic layer-encapsulated carbon nanofibers (G-CF-Ag) as current collectors/anodes for LIB/LMBs and regulated interface chemistry to enhance hybrid battery performance.

Innovation 1: In hybrid storage (2.5-0 V, depositing 500 mA h/g Li below 0 V, ≈1.25 mA h/cm2 Li), the battery delivered an ultrahigh plateau capacity of 716 mA h/g at 0.2 C (capacity below 0.1V voltage) while maintaining 99.1% average CE over 150 fast-charge cycles at 2 C. Stable operation was achieved across a wide temperature range from 50°C to -20°C.

Innovation 2: With an N/P ratio of 0.3, G-CF-Ag||NCM811 delivered a high energy density of 587.5 W h kg−1 at 0.2 C. Under the same N/P ratio, G-CF-Ag||LFP demonstrated stable cycling across the wide temperature range of 50°C to -20°C.