在“双碳”背景下,将超级电容器领域中的研究成果与实验教学相互融合,打造了一个适用于高等院校工科专业大学一年级学生的普通化学实验。从氧化锰电极材料的合成和储能原理出发,引导学生掌握电沉积技术和电化学性能评估方法,鼓励学生进...在“双碳”背景下,将超级电容器领域中的研究成果与实验教学相互融合,打造了一个适用于高等院校工科专业大学一年级学生的普通化学实验。从氧化锰电极材料的合成和储能原理出发,引导学生掌握电沉积技术和电化学性能评估方法,鼓励学生进行交流与讨论。实验的开设有助于学生了解科学研究的基本方法,培养创新意识和团队协作精神,为新时代高校普通化学实验课程的有效开展提供了宝贵经验。Under the background of “Double Carbon” goal, a general chemistry experiment for first-year students majoring in engineering at the university has been developed by integrating research achievements in the field of supercapacitors with experimental teaching. Starting from the synthesis and energy storage mechanism of manganese oxide electrode materials, this experiment guides students to master electrodeposition technology and electrochemical performance evaluation methods. Meanwhile, students are encouraged to engage in communication and discussion during experimental process. The establishment of this experiment not only helps students understand the basic method of scientific research but also fosters their innovative mindset and teamwork spirit, providing valuable experience for the effective delivery of general chemistry experimental courses in college in the new era.展开更多
超级电容器是一种新型电化学储能器件,具有充放电速度快、使用寿命长及安全环保等特点,可广泛应用于民用、军事及航空航天等领域。电极材料是影响超级电容器性能的重要指标。氧化锰电极材料具有理论容量大、电位窗口宽及储量丰富等优势...超级电容器是一种新型电化学储能器件,具有充放电速度快、使用寿命长及安全环保等特点,可广泛应用于民用、军事及航空航天等领域。电极材料是影响超级电容器性能的重要指标。氧化锰电极材料具有理论容量大、电位窗口宽及储量丰富等优势,但其自身电导率较低,实际电化学性能表现仍需进一步提高。本文利用恒电流沉积技术在碳布基底上电沉积氧化锰电极材料,研究了制备液中Mn2+浓度对氧化锰电化学性能的影响。结果表明,当制备液中Mn2+浓度为0.15 mol/L时,沉积时间为10 min时,所制备的氧化锰具有多孔状的纳米纤维形貌,在1 mA/cm2电流密度下的面积比电容高达841.0 mF/cm2,在50 mA/cm2下的比电容维持率高达53.91%。Supercapacitors are a novel type of electrochemical energy storage device characterized by rapid charging and discharging, long service life, safety, and environmental friendliness. They can be broadly applied in civil, military, aerospace, and other fields. Electrode material is a crucial factor influencing the performance of supercapacitors. Manganese oxide electrode materials offer advantages such as high theoretical capacitance, wide potential window, and abundant reserves. However, their low intrinsic conductivity necessitates further enhancement of their actual electrochemical performance. In this paper, manganese oxide electrode materials were electrodeposited onto a carbon cloth substrate using galvanostatic deposition technology. The influence of Mn2+ concentration in the preparation solution on the electrochemical performance of manganese oxide was investigated. The results indicated that when the Mn2+ concentration in the preparation solution was 0.15 mol/L and the deposition time was 10 minutes, the prepared manganese oxide exhibited a porous nanofiber morphology. It achieved a high areal capacitance of 841.0 mF/cm2 at a current density of 1 mA/cm2 and maintained a high capacitance retention rate of 53.91% at 50 mA/cm2.展开更多
文摘在“双碳”背景下,将超级电容器领域中的研究成果与实验教学相互融合,打造了一个适用于高等院校工科专业大学一年级学生的普通化学实验。从氧化锰电极材料的合成和储能原理出发,引导学生掌握电沉积技术和电化学性能评估方法,鼓励学生进行交流与讨论。实验的开设有助于学生了解科学研究的基本方法,培养创新意识和团队协作精神,为新时代高校普通化学实验课程的有效开展提供了宝贵经验。Under the background of “Double Carbon” goal, a general chemistry experiment for first-year students majoring in engineering at the university has been developed by integrating research achievements in the field of supercapacitors with experimental teaching. Starting from the synthesis and energy storage mechanism of manganese oxide electrode materials, this experiment guides students to master electrodeposition technology and electrochemical performance evaluation methods. Meanwhile, students are encouraged to engage in communication and discussion during experimental process. The establishment of this experiment not only helps students understand the basic method of scientific research but also fosters their innovative mindset and teamwork spirit, providing valuable experience for the effective delivery of general chemistry experimental courses in college in the new era.
文摘超级电容器是一种新型电化学储能器件,具有充放电速度快、使用寿命长及安全环保等特点,可广泛应用于民用、军事及航空航天等领域。电极材料是影响超级电容器性能的重要指标。氧化锰电极材料具有理论容量大、电位窗口宽及储量丰富等优势,但其自身电导率较低,实际电化学性能表现仍需进一步提高。本文利用恒电流沉积技术在碳布基底上电沉积氧化锰电极材料,研究了制备液中Mn2+浓度对氧化锰电化学性能的影响。结果表明,当制备液中Mn2+浓度为0.15 mol/L时,沉积时间为10 min时,所制备的氧化锰具有多孔状的纳米纤维形貌,在1 mA/cm2电流密度下的面积比电容高达841.0 mF/cm2,在50 mA/cm2下的比电容维持率高达53.91%。Supercapacitors are a novel type of electrochemical energy storage device characterized by rapid charging and discharging, long service life, safety, and environmental friendliness. They can be broadly applied in civil, military, aerospace, and other fields. Electrode material is a crucial factor influencing the performance of supercapacitors. Manganese oxide electrode materials offer advantages such as high theoretical capacitance, wide potential window, and abundant reserves. However, their low intrinsic conductivity necessitates further enhancement of their actual electrochemical performance. In this paper, manganese oxide electrode materials were electrodeposited onto a carbon cloth substrate using galvanostatic deposition technology. The influence of Mn2+ concentration in the preparation solution on the electrochemical performance of manganese oxide was investigated. The results indicated that when the Mn2+ concentration in the preparation solution was 0.15 mol/L and the deposition time was 10 minutes, the prepared manganese oxide exhibited a porous nanofiber morphology. It achieved a high areal capacitance of 841.0 mF/cm2 at a current density of 1 mA/cm2 and maintained a high capacitance retention rate of 53.91% at 50 mA/cm2.
