Impact of carbon coating processing using sucrose for thick binder-free titanium niobium oxide lithium-ion battery anode

Journal of Electrochemical Science and Engineering

article

Chen Cai¹  Patrick McCormack¹  Ziyang Nie¹  Gary Koenig¹ 

[1] Department of Chemical Engineering, University of Virginia

关键词: Electronic conductivity;    mechanical stability;    cycle life;    discharge voltage;    rate capability;   

DOI  :  10.5599/jese.1655

学科分类：内科医学

来源: International Association of Physical Chemists (IAPC)

【 摘 要 】

Lithium-ion batteries are increasingly important for providing energy storage solutions. In the drive to improve the energy density at the cell level, optimizing the electrode architecture is crucial in addition to researching new materials. Binder-free (BF) electrodes include porous pellets only containing battery electroactive materials. These electrodes can provide advantages with regard to mechanical stability and alleviated ion transport limitations relative to composite approaches for very thick and energy-dense electrodes. However, the absence of conductive additives often limits suitable material candidates for BF battery electrodes. TiNb2O7 (TNO) is a promising BF electrode material from a gravimetric and volumetric capacity standpoint, but phase pure TNO has relatively low electronic conductivity. Herein, a sucrose precursor coating method for TNO materials was implemented to process the TNO materials into BF electrodes. The sucrose served as a source to generate carbon in the electrodes, where the carbon coating resulted in an increase in rate capability, discharge voltage, and cycle life.

【 授权许可】

CC BY