NiO-La0.3Ce0.7O2-δ(LDC30) novel anode was investigated for IT-SOFCs(Intermediate Temperature-Solid Oxide Fuel Cells) with LaGaO3-based electrolyte. The results showed that LDC30 has a suitable chemical compatibility ...NiO-La0.3Ce0.7O2-δ(LDC30) novel anode was investigated for IT-SOFCs(Intermediate Temperature-Solid Oxide Fuel Cells) with LaGaO3-based electrolyte. The results showed that LDC30 has a suitable chemical compatibility with NiO and NiO-LDC30 has a good thermal expansion matching with LDC30 interlayer and LSGM(La0.8Sr0.2Ga0.8Mg0.2O3-δ) electrolyte, so NiO-LDC30/LDC30 was considered as a feasible and novel anode system. It was also shown that NiO content plays a key role on polarization performance and morphology of the anode. When the content of NiO was 60%(mass fraction), the polarization loss of anode was the lowest. Next we will optimize the porosity and sintering procedure to modify the microstructure and performance of the anode.展开更多
采用化学共沉淀法预先合成球形前驱体Ni0.5Co0.2Mn0.3（OH）2,再与锂源共混后高温煅烧合成高容量正极材料Li Ni0.5Co0.3Mn0.2O2。探讨了不同烧结制度对材料结构性能的影响。X射线衍射（XRD）结果表明,产物结构为α-Na Fe O2型层状结构...采用化学共沉淀法预先合成球形前驱体Ni0.5Co0.2Mn0.3（OH）2,再与锂源共混后高温煅烧合成高容量正极材料Li Ni0.5Co0.3Mn0.2O2。探讨了不同烧结制度对材料结构性能的影响。X射线衍射（XRD）结果表明,产物结构为α-Na Fe O2型层状结构。扫描电子显微镜（SEM）显示材料具有良好的球形形貌。测试材料的电化学性能,在2.75~4.20 V和2.75~4.35 V充放电截止电压,0.5 C充放电电流下,首次放电比容量分别为162.2和172.6 m Ah/g,循环3周后容量保持率分别为96.73%和94.62%。材料还表现出良好的倍率性能。展开更多
采用共沉淀-高温固相法制备LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2锂离子正极材料,并使用X射线衍射仪(XRD)和扫描电镜(SEM)技术分别表征其结构和形貌.然后将所得LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2正极材料组装成扣式电池,并表征其电化学性能,探讨...采用共沉淀-高温固相法制备LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2锂离子正极材料,并使用X射线衍射仪(XRD)和扫描电镜(SEM)技术分别表征其结构和形貌.然后将所得LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2正极材料组装成扣式电池,并表征其电化学性能,探讨烧结温度和锂配量对其电化学性能的影响.结果表明:所得LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2正极材料的放电比容量随烧结温度的升高而增大,且在900℃时表现出最佳的电化学性能.室温下,1C倍率下,锂配量(n(Li)/n(Ni+Co+Mn)=1.09)时,正极材料的首次放电容量为143.7 m Ah/g,50次循环后,正极材料的放电比容量仍有141.3 m Ah/g,容量保持率为98.3%.展开更多
文摘NiO-La0.3Ce0.7O2-δ(LDC30) novel anode was investigated for IT-SOFCs(Intermediate Temperature-Solid Oxide Fuel Cells) with LaGaO3-based electrolyte. The results showed that LDC30 has a suitable chemical compatibility with NiO and NiO-LDC30 has a good thermal expansion matching with LDC30 interlayer and LSGM(La0.8Sr0.2Ga0.8Mg0.2O3-δ) electrolyte, so NiO-LDC30/LDC30 was considered as a feasible and novel anode system. It was also shown that NiO content plays a key role on polarization performance and morphology of the anode. When the content of NiO was 60%(mass fraction), the polarization loss of anode was the lowest. Next we will optimize the porosity and sintering procedure to modify the microstructure and performance of the anode.
文摘采用化学共沉淀法预先合成球形前驱体Ni0.5Co0.2Mn0.3（OH）2,再与锂源共混后高温煅烧合成高容量正极材料Li Ni0.5Co0.3Mn0.2O2。探讨了不同烧结制度对材料结构性能的影响。X射线衍射（XRD）结果表明,产物结构为α-Na Fe O2型层状结构。扫描电子显微镜（SEM）显示材料具有良好的球形形貌。测试材料的电化学性能,在2.75~4.20 V和2.75~4.35 V充放电截止电压,0.5 C充放电电流下,首次放电比容量分别为162.2和172.6 m Ah/g,循环3周后容量保持率分别为96.73%和94.62%。材料还表现出良好的倍率性能。
文摘采用共沉淀-高温固相法制备LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2锂离子正极材料,并使用X射线衍射仪(XRD)和扫描电镜(SEM)技术分别表征其结构和形貌.然后将所得LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2正极材料组装成扣式电池,并表征其电化学性能,探讨烧结温度和锂配量对其电化学性能的影响.结果表明:所得LiNi_(0.6)Co_(0.1)Mn_(0.3)O_2正极材料的放电比容量随烧结温度的升高而增大,且在900℃时表现出最佳的电化学性能.室温下,1C倍率下,锂配量(n(Li)/n(Ni+Co+Mn)=1.09)时,正极材料的首次放电容量为143.7 m Ah/g,50次循环后,正极材料的放电比容量仍有141.3 m Ah/g,容量保持率为98.3%.
