Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating

Abstract

The poor electronic conductivity restricts the wide applications of Li4Ti5O12 as anode materials in Li‐ion batteries. We report a facile approach to fabricate nitrogen‐doped carbon‐coated Li4Ti5O12 through carbonizing pyrrole and pyridine at different temperatures. Comparative experiments demonstrated that the carbon content plays a key role in governing the cycling performance and rate capability of Li4Ti5O12. The composites with higher carbon content exhibited superior cycling performance, and the composite prepared at 600 °C using pyridine as the carbon source gave the best cycling and rate performance.

Low-cost and environmentally friendly synthesis of an Al3+and Mn4+co-doped Li4Ti5O12composite with carbon quantum dots as an anode for lithium-ion batteries

“…However, LTO has important shortcomings; for example, the theoretical specic capacity is only 175 mA h g À1 , and the intrinsic conductivity is only 10 À13 S cm À1 . [3][4][5][6][7] Thus, the commercial application of LTO in LIBs is hindered by these weaknesses.…”

Boosting Ultra-Fast Charge Battery Performance: Filling Porous nanoLi4Ti5O12 Particles with 3D Network of N-doped Carbons

“…The carbon painting was done by vapor deposition, resulting in a uniform carbon coating of the particles with high electronic conductivity 16 . Recently, few publications have reported the use of organic substances 42,43 or polymers 44 (folic acid, pyrrole, etc.) as the source for N-doped carbons; however, all are using classical mechanical mixing methods such as ball milling which does not allow the formation of a homogeneous coating.…”