李艳博士论文"A novel layered Ni-rich cathode hierarchical architecture of densely integrating hydroxide nanoflakes onto oxide microspheres with superior lithium storage property"被Mater Chem Front接收发表
发布时间：2020-04-25
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李艳博士论文"A novel layered Ni-rich cathode hierarchical architecture of densely integrating hydroxide nanoflakes onto oxide microspheres with superior lithium storage property"被Mater Chem Front接收发表。
For the first time, a novel hierarchical architecture of Ni0.8Co0.1Mn0.1Ox@Ni0.8Co0.1Mn0.1(OH)2 is proposed herein by densely integrating co-precipitated Ni0.8Co0.1Mn0.1(OH)2 nanoflakes onto spray-pyrolyzed Ni0.8Co0.1Mn0.1Ox microsphere. The coprecipitated hydroxides layer can keep the Ni0.8Co0.1Mn0.1Ox microspheres from fragmenting during the sintering process, thus yielding uniform spherical LiNi0.8Co0.1Mn0.1O2 with a hollow interior morphology. Strikingly, the uniform spherical LiNi0.8Co0.1Mn0.1O2 cathode derived from the hierarchical precursor exhibits improved tap density and initial coulombic efficiency, as well as excellent cycling stability and superior rate capability. Discharge capacities of 169 mAh g-1 after 300 cycles at 1 C (180 mA g-1) between 2.8 and 4.3 V are consistently obtained, corresponding to 90.5% capacity retention. Of great significance, it is strongly envisioned that this novel hierarchical structure design concept holds great promise for the architectural construction of other energy storage materials.
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