Effect of PVP Coating on LiMnBO3 Cathodes for Li-Ion Batteries

Materials

Bolong Hong¹  Huihua Yi¹  Chenglin Hu¹  Xiangming He² 

[1] Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, School of Materials Science and Engineering, Hubei Polytechnic University, Huangshi 435003, China;Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;

关键词: lithium-ion batteries;    polyvinyl pyrrolidone;    carbon coating;    MnO;   

DOI  :  10.3390/ma13235528

来源: DOAJ

【 摘 要 】

LiMnBO₃ is a potential cathode for Li-ion batteries, but it suffers from a low electrochemical activity. To improve the electrochemical performance of LiMnBO₃, the effect of polyvinyl pyrrolidone (PVP) as carbon additive was studied. Monoclinic LiMnBO₃/C and LiMnBO₃-MnO/C materials were obtained by a solid-state method at 500 °C. The structure, morphology and electrochemical behavior of these materials are characterized and compared. The results show that carbon additives and ball-milling dispersants affect the formation of impurities in the final products, but MnO is beneficial for the performance of LiMnBO₃. The sample of LiMnBO₃-MnO/C delivered a high capacity of 162.1 mAh g⁻¹ because the synergistic effect of the MnO/C composite and the suppression of the PVP coating on particle growth facilitates charge transfer and lithium–ion diffusion.

【 授权许可】

Unknown