发表刊物：Chem. Electro. Chem
摘要：Lithium- and manganese-rich layered oxides face great challenges for practical applications, including gradual voltage decay upon normal charge/discharge cycling and the relatively low volumetric energy density. This series of materials generally suffer from a great reduction in reversible capacity with an increase of the current density and the loading density of the electrode, which can be attributed to the low Li+ conductivity of the material, as previously reported. Herein, BPO4 is proposed to encapsulate Li1.16(Ni0.25Mn0.75)0.84O2 (LNMO) particles and is expected to form a Li-doped LixBPO4+ x/2 (LBP) layer as a lithiumion conductor on the particle surface to facilitate the transportation of Li+ across the solidliquid interface. The results confirm that the LBP layer was formed, providing a lithium-ion diffusion path and suppressing the undesired interfacial reactions. A LNMO sample coated with 1.6 mol% LBP (LBP@LNMO) demonstrated excellent rate capability, retaining 90.2, 80.2, 61.2, and 43.5 % at 1, 2, 5, and 10 C rates of the capacity at the 0.5 C
论文类型：期刊论文
是否译文：否
发表时间：2017-01-01