Layered solid solution material Lil.2Nio.2Mn0.602 is synthesized and the A1F3 is added to improve the electrochemical performance. X-ray diffraction （XRD） results show that the Lil.2Nio.2Mno.602 samples exhibit laye...Layered solid solution material Lil.2Nio.2Mn0.602 is synthesized and the A1F3 is added to improve the electrochemical performance. X-ray diffraction （XRD） results show that the Lil.2Nio.2Mno.602 samples exhibit layered characteristics. The A1F3 additive is detected by transmission electron microscope （TEM） technology. The electrochemical tests show that Lil.2Nio.2Mno.602 electrode with A1F3 added delivers better discharge capacity （240mA.h/g）, first coulomb efficiency 79.2%, cyclic performance （capacity retention ratio of 100.6% after 50 cycles）, and rate capacity （68 mA. h/g at 10 capacity （C）） than the pristine sample. Electrochemical impedance spectroscopy （EIS） results show that the charge transfer resistance of Lil.2Ni0.2Mno.602 electrode with A1F3 added increases slower than that of pristine Lil.2Ni0.2Mno.602 after cycling, which is responsible for better cyclic and rate performance.展开更多
基金the Postdoctoral Foundation of China (No.2012M511211)the Postdoctoral Foundation of Jiangsu Province(No.1102121C)
文摘Layered solid solution material Lil.2Nio.2Mn0.602 is synthesized and the A1F3 is added to improve the electrochemical performance. X-ray diffraction （XRD） results show that the Lil.2Nio.2Mno.602 samples exhibit layered characteristics. The A1F3 additive is detected by transmission electron microscope （TEM） technology. The electrochemical tests show that Lil.2Nio.2Mno.602 electrode with A1F3 added delivers better discharge capacity （240mA.h/g）, first coulomb efficiency 79.2%, cyclic performance （capacity retention ratio of 100.6% after 50 cycles）, and rate capacity （68 mA. h/g at 10 capacity （C）） than the pristine sample. Electrochemical impedance spectroscopy （EIS） results show that the charge transfer resistance of Lil.2Ni0.2Mno.602 electrode with A1F3 added increases slower than that of pristine Lil.2Ni0.2Mno.602 after cycling, which is responsible for better cyclic and rate performance.
