本文通过简单的电荷吸附制备了高分散的氧化石墨烯含锰化合物(Mn-GO),利用高温驱动下氧化锰的生长以及热运动同时实现了GO的还原、刻蚀和纳米氧化锰的负载,即成功构筑了纳米氧化锰-多孔石墨烯复合材料(MnO-PGNSs).对影响GO分散性的Mn2+...本文通过简单的电荷吸附制备了高分散的氧化石墨烯含锰化合物(Mn-GO),利用高温驱动下氧化锰的生长以及热运动同时实现了GO的还原、刻蚀和纳米氧化锰的负载,即成功构筑了纳米氧化锰-多孔石墨烯复合材料(MnO-PGNSs).对影响GO分散性的Mn2+的添加量、影响GO层数的分散液浓度以及影响MnO热运动的烧结条件进行了详细的考察.研究发现,当Mn-GO同时满足优异的分散性、适合的片层厚度和烧结条件(>800oC,>2h),才能在GNSs表面刻蚀成孔制备得到MnO-PGNSs.本文进一步将MnO-PGNSs作为锂空气电池正极材料,结果表明在50 mA·g-1的电流密度下深度放电后容量达到5100 mA h·g-1,相比于GNSs和PGNSs,MnO-PGNSs具有更高的比容量.锂空气电池性能的提高得益于GNSs表面的多孔结构和MnO优异的催化活性.展开更多
Nickel-cobalt oxide nano-flakes materials are successfully synthesized by a facile chemical co-precipitation method followed by a simple calcination process. The studies show that the as-prepared nickel-cobalt oxides ...Nickel-cobalt oxide nano-flakes materials are successfully synthesized by a facile chemical co-precipitation method followed by a simple calcination process. The studies show that the as-prepared nickel-cobalt oxides with different Ni/Co ratio are composed of NiO and Co304 compounds. The Co0.56Nio.44 oxide material, which exhibits a mesoporous structure with a narrow distribution of pore size from 2 to 7 nm, possesses markedly enhanced charge-discharge properties at high current density compared with the pure NiO and pure CO304. The Co0.56Ni0.44 oxide electrode shows a specific capacitance value of 1227 F/g at 5 mA/cm2, which is nearly three times greater than that of the pure NiO electrode at the same current density.展开更多
文摘本文通过简单的电荷吸附制备了高分散的氧化石墨烯含锰化合物(Mn-GO),利用高温驱动下氧化锰的生长以及热运动同时实现了GO的还原、刻蚀和纳米氧化锰的负载,即成功构筑了纳米氧化锰-多孔石墨烯复合材料(MnO-PGNSs).对影响GO分散性的Mn2+的添加量、影响GO层数的分散液浓度以及影响MnO热运动的烧结条件进行了详细的考察.研究发现,当Mn-GO同时满足优异的分散性、适合的片层厚度和烧结条件(>800oC,>2h),才能在GNSs表面刻蚀成孔制备得到MnO-PGNSs.本文进一步将MnO-PGNSs作为锂空气电池正极材料,结果表明在50 mA·g-1的电流密度下深度放电后容量达到5100 mA h·g-1,相比于GNSs和PGNSs,MnO-PGNSs具有更高的比容量.锂空气电池性能的提高得益于GNSs表面的多孔结构和MnO优异的催化活性.
基金supported by The Top Hundred Talents Program of the Chinese Academy of SciencesNational Natural Science Foundations of China(No.51005225,No.21203223)
文摘Nickel-cobalt oxide nano-flakes materials are successfully synthesized by a facile chemical co-precipitation method followed by a simple calcination process. The studies show that the as-prepared nickel-cobalt oxides with different Ni/Co ratio are composed of NiO and Co304 compounds. The Co0.56Nio.44 oxide material, which exhibits a mesoporous structure with a narrow distribution of pore size from 2 to 7 nm, possesses markedly enhanced charge-discharge properties at high current density compared with the pure NiO and pure CO304. The Co0.56Ni0.44 oxide electrode shows a specific capacitance value of 1227 F/g at 5 mA/cm2, which is nearly three times greater than that of the pure NiO electrode at the same current density.
基金supported by the National Nature Science Foundations of China (Grant No. 21673263, and 51572247)the Shandong Province Natural Science Foundation (Grant No. ZR2014EMM003)the Independent Innovation Plan Foundations of Qingdao City of China (Grant No. 16-5-1-42-jch)
