With tetramethylethylene (2,3-Dimethyl-2-butene, TME) as the polymer source, lithium powder (Li) was immersed to obtain highly stable lithium powder (TME-Li) coated with poly 2,3-Dimethyl-2-butene. It was pre-embedded into an electrode sheet with an intermediate carbon microsphere (MCMB)/multi-wall carbon nanotube (MWCNT)/super carbon black (SP) composite material as a negative electrode and assembled into a lithium-ion capacitor (LIC). Scanning electron microscopy and intelligent Fourier transform infrared spectroscopy were used to analyze lithium powder and electrode sheets scientifically. In addition, constant current charge–discharge (GCD) and electrochemical impedance spectroscopy were also used to analyze the electrochemical properties of the LIC. The results show that embedded TME-Li can improve the electrochemical performance of capacitors efficiently. When the current density is 50 mA g⁻¹, the specific capacitance can reach 69.09 F g⁻¹. Within the current density range of 50–700 mA g⁻¹, the maximum power density is 1.02 kw kg⁻¹, and the energy density is as high as 91.14 Wh kg⁻¹. After 4000 constant current charge and discharge cycles, the capacitance retention rate is still above 83%, showing good electrochemical performance.

以四甲基乙烯（2,3-二甲基-2-丁烯，TME）为聚合物源，将锂粉（Li）浸入以获得高稳定性的涂有聚2,3-二甲基-2-丁烯的锂粉（TME-Li）。 。将其预先嵌入以中间碳微球（MCMB）/多壁碳纳米管（MWCNT）/超级碳黑（SP）复合材料为负极的电极片中，并组装成锂离子电容器（LIC） 。运用扫描电子显微镜和智能傅里叶变换红外光谱对锂粉和电极片进行了科学分析。此外，还使用恒流充放电（GCD）和电化学阻抗谱分析LIC的电化学性质。结果表明，嵌入式TME-Li可以有效提高电容器的电化学性能。当电流密度为50 mA g^-1，比电容可以达到69.09 F g ^-1。在50–700 mA g ^-1的电流密度范围内，最大功率密度为1.02 kw kg ^-1，能量密度高达91.14 Wh kg ^-1。经过4000次恒定电流充放电循环后，电容保持率仍高于83％，表现出良好的电化学性能。