论文标题
锂离子电池的室温液体金属负电极的一步搅拌制备
One-step stirring preparation of room temperature liquid metal negative electrode for the lithium-ion battery
论文作者
论文摘要
作为一种新型的自我修复材料，由GA和SN组成的室温液体金属（LM）是锂离子电池中有前途的阳极（LIBS）。很难直接准备使用纯LM的电极浆料。在这里，通过简单的高速搅拌方法成功制备了LM电极浆。浆液中的LM以液体颗粒的形式均匀分布（平均尺寸为100μm），没有发生聚集。 LM的初始排放特异性能力为1148 mAh G-1，稳定的排放特异性容量为350 mAh g-1。循环伏安法测量表明，在0.37 V，0.67 V，0.67 V，1.02 V和0.72 V，0.79 V，0.97 V，0.79 V，0.97 V中出现三对明显的还原峰和氧化。 SEI膜在长周期内消耗活性锂和电解质，从而导致可逆能力损失。
As a new type of self-healing material, room-temperature liquid metal (LM) composed of Ga, In and Sn is a promising anode in lithium-ion batteries (LIBs). It is difficult to directly prepare an electrode slurry with pure LM. Here, the LM electrode slurry was successfully prepared by simple high-speed stirring method. The LM in the slurry was evenly distributed in the form of liquid particles (average size 100 μm) and no aggregation occurred. The initial discharge specific capacity of LM is 1148 mAh g-1, and the stable discharge specific capacity is 350 mAh g-1. Cyclic voltammetry measurements show that three pairs of obvious reduction peaks and oxidation occur in LM anodes at 0.37 V,0.67 V,1.02 V and 0.72 V,0.79 V,0.97 V. In the process of lithium insertion, the LM undergoes a liquid-solid phase transition, and when it is delithiated, it will be converted into a liquid phase. The SEI film consumed active lithium and electrolyte during the long cycle, resulting in loss of reversible capacity.
