随着科技的发展，锂离子电池因其优越的性能和高效的经济效益被人们应用于各

With the development of science and technology, lithium-ion batteries have been used in various fields due to their superior performance and high-efficiency economic benefits. At the same time, people have also conducted more in-depth research on lithium-ion batteries. Carbon has become a research hotspot for lithium storage materials because of its light weight, well-developed pore structure, good electrical conductivity, and high temperature and corrosion resistance. In this paper, sisal is used as a raw material, and the nitrogen-phosphorus-doped sisal fiber activated carbon is prepared by hydrothermal carbonization, and it is used as a substrate to compound with nano-molybdenum selenide to prepare a multi-level structure of N, P-SFAC / MoSe2 negative electrode material for lithium ion battery. Using XRD, SEM, Raman spectroscopy and other methods to characterize the structure and morphology of the resulting materials, and using electrochemical workstations and battery testers to test their electrochemical performance, the types of surfactants (CTAB and PVP) were studied ) And the influence of its content and substrate on the morphology, structure and electrochemical performance of N, P-SFAC / MoSe2 composites. <br>The research results show that the best preparation conditions of N, P-SFAC / MoSe2 are: PVP as 0.005 g content as a surfactant, N, P-SFAC as a substrate, N, P-SFAC / MoSe2 prepared under these conditions Has a specific surface area of ​​1456.30 m2 / g and an impedance of 40 Ω. At a high current density of 2 A / g, the first specific capacity is 2500 mAh / g. After 500 cycles, the specific capacity of 500 mAh / g is still maintained, corresponding to The charging and discharging efficiency has reached 100%.

With the development of science and technology, lithium-ion battery because of its superior performance and efficient economic benefits have been applied to various fields, at the same time, people also have more in-depth research on lithium-ion batteries, the expectation can be developed more superior performance of lithium-ion batteries, biochar because of its light quality, developed hole structure, good conductive properties, high temperature and corrosion resistance and so on, has become a hot spot for lithium storage materials. In this paper, the active carbon of nitrogen-phosphorus-doped sabre fiber is prepared by using hydrothermal carbonization method, and it is composited with nano-disselenium as a substrate, and the negative material of the multi-stage structure N, P-SFAC/MoSe2 lithium-ion battery is prepared. Using XRD, SEM, Raman spectroscopy and other means to characterize the structure, shape and so on of the resulting material, as well as electrochemical workstation silos and battery tester to test its electrochemical properties, the types of surfactants (CTAB and PVP) and their content, substrate, etc. on the shape, structure and electrochemical properties of N, P-SFAC/MoSe2 composite materials.<br>The results show that the best preparation conditions for N, P-SFAC/MoSe2 are: PVP with 0.005 g content as the surfactant, N, P-SFAC as the substrate, N, n, prepared under this condition, The ratio area of P-SFAC/MoSe2 is 1456.30 m2/g, the impedance is 40 o, at a high current density of 2 A/g, the first ratio capacity is 2500 mAh/g, after 500 cycles, still maintain the capacity ratio of 500 mAh/g, the corresponding charge and discharge efficiency also reached 100%.

With the development of science and technology, lithium-ion battery has been applied in various fields because of its superior performance and efficient economic benefits. At the same time, people also have more in-depth research on lithium-ion battery, expecting to develop a lithium battery with more superior performance. Biochar has become the research of lithium storage materials because of its light weight, developed pore structure, good conductivity, high temperature and corrosion resistance hotspot. In this paper, sisal fiber activated carbon doped with nitrogen and phosphorus was prepared by hydrothermal carbonization method, and it was used as the substrate to composite with nano molybdenum selenide to prepare n, p-sfac / MoSe2 lithium-ion battery anode material with multi-stage structure. The structure and morphology of the materials were characterized by XRD, SEM and Raman spectroscopy, and the electrochemical properties of the materials were tested by electrochemical workstation and battery tester. The effects of the kinds of surfactants (CTAB and PVP) and their contents, substrate, etc. on the morphology, structure and electrochemical properties of N, p-sfac / MoSe2 composites were studied.<br>The results show that the best preparation conditions of N, p-sfac / MoSe2 are as follows: 0.005 g PVP is used as surfactant, N, p-sfac is used as substrate, and N, p-sfac is prepared under these conditions, The specific surface area of p-sfac / MoSe2 is 1456.30 m2 / g, and the impedance is 40 Ω. At the high current density of 2 A / g, the first specific capacity is 2500 MAH / g. after 500 cycles, the specific capacity of 500 MAH / G is still maintained, and the corresponding charging and discharging efficiency is 100%.