纳米金属锂离子电池负极材料

Based on two patents, some nano-alloys of anode materials such as Sb、SnSb and CuSn have been synthesized. The variation of structure and micro-structure of the nano-alloys and other basic problem during charge/discharge cycling process have been systematiclly investigated by using Raman、FTIR、HRTEM and impedance methode. It should be emphasized that the electrochemical agglomeration of Nano-alloy particles during cycling has been observed and solved. A novel hard carbon spheres(HCS) with nano-pores has been synthesized fro sugur solution under hydrothermal condition. The HCS has many advantages compared with MCMB such as higher capacity for lithium storage, better rate performance, more safety and cheaper as well. This is a original creative result. A Nano-alloy/HCS composite anode material has been prepared by pinning nano-SbSn on the surfaces of HCS. The electrochemical agglomeration of nano-alloy material has been avoided.

本申请在我们两项发明的基础上，筛选出合适的纳米金属作为锂离子电池负极材料，用喇曼光谱，傅立叶变换红外光谱，高分辨电镜和阻抗谱等方法，研究和解决实用化中可能出现的基础问题。进而研制出有自主知识产权的新一代锂离子电池，使之具有更高的能量密度功率密度和更长的循环寿命。