Synthesis and electrochemical study of LiNi1/3Co1/3Mn1/3O2 cathode materials for lithium-ion batteries by polymer network gel method

The LiNi1/3Co1/3Mn1/3O2 material was successfully synthesized by the network gel method. Specifically, a prepared LiNi1/3Co1/3Mn1/3O2 material has a small uniform particle size while shows excellent electrochemical performance. The initially provided discharge capacity is 181.9 mAh.g(-1) at 0.5 C, and the capacity remains 60.6% after 100 cycles at 2.5-4.5 V. In addition, when the current density is 5 C, the excellent discharge capacity of 113.4 mAh.g(-1) and the capacity retention of 52.3% indicate that the LiNi1/3Co1/3Mn1/3O2 material has superior rate performance. This good electrochemical performance of the material can be attributed to the gel formed by polymerization to prevent the components in the solution from contacting each other. There are two advantages of this, obtained material, i.e. good dispersibility and small particle, thereby reducing the charge transfer resistance and increasing the lithium-ion diffusion ability.