also studied the Mg-N alloy and found that Mg75N25 reacts with Li at room temperature, and the circulation is greatly improved compared to pure Mg. Conventional Cu6Sn5 preparation methods include mechanical alloying, gas atomization, and melt rapid quenching [13]. The graphite anode material has a special layered open structure. Used electron beam deposition of 1μm thick SnO as the negative electrode material of thin-film lithium-ion batteries. For now, the research on lithiation of metal compounds mainly focuses on Sn-based intermetallic compounds.
The solution is to prepare active materials with extremely fine particles so that they cannot form large atomic clusters.2 Soft carbon Soft carbon is easily graphitized carbon, which refers to amorphous carbon that can be graphitized at high temperatures above 2500 ° C. Kim et al. Carried out research on the synthesis and structure [1]; and there were many studies on Li3N as a solid electrolyte in the 1980s. However, it should also be noted that the reversible formation and decomposition of Li-M alloys are accompanied by huge volume changes, causing alloy splitting. [18] prepared SiAg alloys. At present, the nitride system materials that people have studied include Li7MnN4 and Li3FeN2 belonging to the anti-fluorite structure, and Li3-xCoxNoLi7MnN4 and Li3FeN2 belonging to Ultra high power Graphite Electrode the structure of Li3N, which have good reversibility and high specific capacity. Keywords: lithium ion battery; negative electrode material; non-carbon negative electrode material; research progress.
Therefore, Al-based intermetallic compounds have broad development prospects as lithium-ion battery anode materials. Thackeray [7] and D. 2 Non-carbon anode materials 2.40nm, which is beneficial to lithium Embedding-de-embedding, good cycle performance. Soft carbon has low crystallinity (ie, graphitization degree), small grain size, large interplanar spacing (d002), good compatibility with electrolyte, but high irreversible capacity for the first charge and discharge, and low output voltage , No obvious charge and discharge platform potential.D.
Therefore, while studying carbon negative electrodes, the work of finding other negative electrode materials with potentials similar to Li + / Li pairs has been paid attention to, such as At present, the main researches are SnO, WO2, MoO2, VO2, TiO2, LixFe2O3, Li4Mn2O12, Li4Ti5O12, etc
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