A Carbon‐Free Li₂TiO₃/Li₂MTi₃O₈ (M═Zn_1/3Co_2/3) Nanocomposite as High‐Rate and Long‐Life Anode for Lithium‐Ion Batteries

Abstract

A carbon‐free biphasic Li2TiO3/Li2MTi3O8 (M═Zn1/3Co2/3) nanocomposite has been rationally designed and successfully synthesized via co‐precipitation and solid‐state reactions, which can effectively improve the Li+ kinetics of lithium titanium oxide anodes. The biphasic intergrowth is beneficial to the size decrease of primary grains and further shortens the Li+ migration path. Cyclic voltammetry (CV) analyses confirm the enhanced Li+ diffusion coefficient as high as 4.22 × 10−11 cm2 s−1. Furthermore, the biphasic nanocomposite delivers a large reversible capacity of ≈200 mAh g−1 at a rate of 0.1 C with a low average voltage of 0.8 V (vs Li/Li+) and an outstanding cycling stability of the capacity (≈100% retention even after 500 cycles at 0.5 C). Furthermore, a superior high‐rate capability, ≈133 mAh g−1 even at a high rate of 20 C, can be achieved. The biphasic intergrowth strategy gives a new insight into developing high‐rate and durable titanium‐based anode for lithium‐ion batteries.

Recent Progress in Research of Solid Tritium Breeder Materials Li2TiO3: A Review

“…A Li 2 TiO 3 /Li 2 MTi 3 O 8 (M = Zn 1/3 Co 2/3 ) nanocomposite was prepared by Hou et al using a co-precipitation method [66]. ZnSO 4 •7H 2 O and CoSO 4 •7H 2 O (with a Zn/Co cationic molar ratio of 1:2) were mixed in deionized water in Tank 1 to obtain a 0.1 M solution under stirring to form the initial aqueous solution.…”