采用共沉淀-高温固相法制备出Ni-Mn固溶的LiNi_(0.9)Mn_(0.1)O_2正极材料,并对材料进行ZrO_2掺杂改性,提高其性能。结合X-射线衍射(XRD)、扫描电镜(SEM)、电化学性能测试分析对LiNi_(0.9)Mn_(0.1)O_2材料性能进行表征。研究表明:掺杂能...采用共沉淀-高温固相法制备出Ni-Mn固溶的LiNi_(0.9)Mn_(0.1)O_2正极材料,并对材料进行ZrO_2掺杂改性,提高其性能。结合X-射线衍射(XRD)、扫描电镜(SEM)、电化学性能测试分析对LiNi_(0.9)Mn_(0.1)O_2材料性能进行表征。研究表明:掺杂能改善材料的电化学性能,ZrO_2掺杂量为1.5%,在25℃、2.75～4.35 V下,材料的首次放电比容量为199.8 m Ah/g,循环50次后,容量保持率为89.79%,在-20℃低温下,放电效率为71.68%。同时分析了材料内阻随放电深度的变化,确定材料电化学阻抗值的变化规律。展开更多
A new method for increasing the three phase boundaries in anode of SOFC is reported. The results of the study show that the three phase boundaries in the SOFC anode Ni+YSZ are greatly increased by doping Ce 0.9 Ca 0.1...A new method for increasing the three phase boundaries in anode of SOFC is reported. The results of the study show that the three phase boundaries in the SOFC anode Ni+YSZ are greatly increased by doping Ce 0.9 Ca 0.1 O 2- δ particles , and the transportation of oxygen ion in the anode is improved as well. By adding Ce 0.9 Ca 0.1 O 2- δ particles, the composite anode is produced and the anode reaction is accelerated, resulting in an improvement of SOFC output properties. The highest power density of SOFC with the anode of Ni+YSZ doped by Ce 0.9 Ca 0.1 O 2- δ particles in a weight ratio of 15%, which is about 3 times higher than that of SOFC with the anode Ni+YSZ without doping, is obtained. [WT5HZ]展开更多
文摘采用共沉淀-高温固相法制备出Ni-Mn固溶的LiNi_(0.9)Mn_(0.1)O_2正极材料,并对材料进行ZrO_2掺杂改性,提高其性能。结合X-射线衍射(XRD)、扫描电镜(SEM)、电化学性能测试分析对LiNi_(0.9)Mn_(0.1)O_2材料性能进行表征。研究表明:掺杂能改善材料的电化学性能,ZrO_2掺杂量为1.5%,在25℃、2.75～4.35 V下,材料的首次放电比容量为199.8 m Ah/g,循环50次后,容量保持率为89.79%,在-20℃低温下,放电效率为71.68%。同时分析了材料内阻随放电深度的变化,确定材料电化学阻抗值的变化规律。
文摘A new method for increasing the three phase boundaries in anode of SOFC is reported. The results of the study show that the three phase boundaries in the SOFC anode Ni+YSZ are greatly increased by doping Ce 0.9 Ca 0.1 O 2- δ particles , and the transportation of oxygen ion in the anode is improved as well. By adding Ce 0.9 Ca 0.1 O 2- δ particles, the composite anode is produced and the anode reaction is accelerated, resulting in an improvement of SOFC output properties. The highest power density of SOFC with the anode of Ni+YSZ doped by Ce 0.9 Ca 0.1 O 2- δ particles in a weight ratio of 15%, which is about 3 times higher than that of SOFC with the anode Ni+YSZ without doping, is obtained. [WT5HZ]
