The Preparation And Modification Of The Anode Materials For Li-ion Battery

Cobalt Oxide (Co3O4) has attracted an increasing amount of attention due to its hightheoretical capacity of890mA h g-1. We implement a hydrothermal route to prepare thedifferent morphologies of Co3O4products. It is found that the urea and the pH play a keyrole in controlling the formation of the different morphologies of Co3O4. Through SEM,CV, EIS, cycling performances and rate capability, we can conclude that the ultra-thinstructure facilitates the diffusion of lithium ions and electrons, which makes Co3O4owingthe best electrochemical performance.Ni0.5TiOPO4has higher energy densities, lower price and better thermal stability, so itattracts much attention for use as anode materials for LIBs. However, as many ofphosphates, Ni0.5TiOPO4exhibits a low electronic conductivity reducing notably itselectrochemical performances. In this paper, we modify the electronic conductivity bydoping the Cu2+ions and preparing the nanoparticle of the Ni0.5TiOPO4, which couldincrease the cycling performance and the rate capability. The result shows that the Cu2+doped and the nanoparticle can also improve the cycling performance and the ratecapability.LiTiOPO4is phosphate compound as well as Ni0.5TiOPO4, and there is no reportabout the use of LiTiOPO4as anode materials for LIBs. To investigate the similarities anddifferences from Ni0.5TiOPO4, we used LiTiOPO4as anode materials for LIBs. The lowelectronic conductivity also limited the development of LiTiOPO4. In this paper, we usedthe glucose and PVDF as carbon sources to increase the electronic conductivity ofLiTiOPO4. We concluded that the electrochemical performance can be improved greatlyby carbon-coated.