Abstract:

Phosphorus@carbon composite anode material has high specific capacity, good safety and low cost. It is expected to be applied to high specific energy battery, but its large volume expansion during lithiation/delithiation shows a great challenge to electrodes process. In this paper, the application of polyacrylic acid (PAA) binder in high specific capacity phosphorous based anode electrodes of lithium ion battery was discussed. The results show that the PAA binder is superior to PVDF binder for phosphorus-carbon composite electrodes according to electrochemical performance evaluation. The first cycle efficiency of the electrodes can reach 85.5%, and the average cycle capacity efficiency is as high as 99.7%. In particular, the bonding strength between the binder and the current collector is the key issue for the electrode performance. This study is helpful to promote the application of the high-capacity phosphorus-based anode and enrich the technology development of high energy density battery.

Key words: anode materials of phosphorus-based, expansion of the electrode, PAA binder, electrochemical performance